CINXE.COM

<!DOCTYPE html> <html class="client-nojs vector-feature-language-in-header-enabled vector-feature-language-in-main-page-header-disabled vector-feature-page-tools-pinned-disabled vector-feature-toc-pinned-clientpref-1 vector-feature-main-menu-pinned-disabled vector-feature-limited-width-clientpref-1 vector-feature-limited-width-content-enabled vector-feature-custom-font-size-clientpref-1 vector-feature-appearance-pinned-clientpref-1 vector-feature-night-mode-enabled skin-theme-clientpref-day vector-sticky-header-enabled vector-toc-available" lang="en" dir="ltr"> <head> <meta charset="UTF-8"> <title>Specctra - Wikipedia</title> <script>(function(){var className="client-js vector-feature-language-in-header-enabled vector-feature-language-in-main-page-header-disabled vector-feature-page-tools-pinned-disabled vector-feature-toc-pinned-clientpref-1 vector-feature-main-menu-pinned-disabled vector-feature-limited-width-clientpref-1 vector-feature-limited-width-content-enabled vector-feature-custom-font-size-clientpref-1 vector-feature-appearance-pinned-clientpref-1 vector-feature-night-mode-enabled skin-theme-clientpref-day vector-sticky-header-enabled vector-toc-available";var cookie=document.cookie.match(/(?:^|; )enwikimwclientpreferences=([^;]+)/);if(cookie){cookie[1].split('%2C').forEach(function(pref){className=className.replace(new RegExp('(^| )'+pref.replace(/-clientpref-\w+$|[^\w-]+/g,'')+'-clientpref-\\w+( |$)'),'$1'+pref+'$2');});}document.documentElement.className=className;}());RLCONF={"wgBreakFrames":false,"wgSeparatorTransformTable":["",""],"wgDigitTransformTable":["",""],"wgDefaultDateFormat":"dmy", "wgMonthNames":["","January","February","March","April","May","June","July","August","September","October","November","December"],"wgRequestId":"0b7e24e9-fc71-4026-b925-5686525bc2d9","wgCanonicalNamespace":"","wgCanonicalSpecialPageName":false,"wgNamespaceNumber":0,"wgPageName":"Specctra","wgTitle":"Specctra","wgCurRevisionId":1258180675,"wgRevisionId":1258180675,"wgArticleId":58818794,"wgIsArticle":true,"wgIsRedirect":false,"wgAction":"view","wgUserName":null,"wgUserGroups":["*"],"wgCategories":["CS1 errors: missing periodical","Use dmy dates from January 2022","Use list-defined references from January 2022","Electronic design automation software"],"wgPageViewLanguage":"en","wgPageContentLanguage":"en","wgPageContentModel":"wikitext","wgRelevantPageName":"Specctra","wgRelevantArticleId":58818794,"wgIsProbablyEditable":true,"wgRelevantPageIsProbablyEditable":true,"wgRestrictionEdit":[],"wgRestrictionMove":[],"wgNoticeProject":"wikipedia","wgCiteReferencePreviewsActive":false, "wgFlaggedRevsParams":{"tags":{"status":{"levels":1}}},"wgMediaViewerOnClick":true,"wgMediaViewerEnabledByDefault":true,"wgPopupsFlags":0,"wgVisualEditor":{"pageLanguageCode":"en","pageLanguageDir":"ltr","pageVariantFallbacks":"en"},"wgMFDisplayWikibaseDescriptions":{"search":true,"watchlist":true,"tagline":false,"nearby":true},"wgWMESchemaEditAttemptStepOversample":false,"wgWMEPageLength":10000,"wgEditSubmitButtonLabelPublish":true,"wgULSPosition":"interlanguage","wgULSisCompactLinksEnabled":false,"wgVector2022LanguageInHeader":true,"wgULSisLanguageSelectorEmpty":false,"wgWikibaseItemId":"Q4049875","wgCheckUserClientHintsHeadersJsApi":["brands","architecture","bitness","fullVersionList","mobile","model","platform","platformVersion"],"GEHomepageSuggestedEditsEnableTopics":true,"wgGETopicsMatchModeEnabled":false,"wgGEStructuredTaskRejectionReasonTextInputEnabled":false,"wgGELevelingUpEnabledForUser":false};RLSTATE={"ext.globalCssJs.user.styles":"ready","site.styles":"ready", "user.styles":"ready","ext.globalCssJs.user":"ready","user":"ready","user.options":"loading","ext.cite.styles":"ready","skins.vector.search.codex.styles":"ready","skins.vector.styles":"ready","skins.vector.icons":"ready","jquery.makeCollapsible.styles":"ready","ext.wikimediamessages.styles":"ready","ext.visualEditor.desktopArticleTarget.noscript":"ready","ext.uls.interlanguage":"ready","wikibase.client.init":"ready","ext.wikimediaBadges":"ready"};RLPAGEMODULES=["ext.cite.ux-enhancements","site","mediawiki.page.ready","jquery.makeCollapsible","mediawiki.toc","skins.vector.js","ext.centralNotice.geoIP","ext.centralNotice.startUp","ext.gadget.ReferenceTooltips","ext.gadget.switcher","ext.urlShortener.toolbar","ext.centralauth.centralautologin","ext.popups","ext.visualEditor.desktopArticleTarget.init","ext.visualEditor.targetLoader","ext.echo.centralauth","ext.eventLogging","ext.wikimediaEvents","ext.navigationTiming","ext.uls.interface","ext.cx.eventlogging.campaigns", "ext.cx.uls.quick.actions","wikibase.client.vector-2022","ext.checkUser.clientHints","ext.growthExperiments.SuggestedEditSession"];</script> <script>(RLQ=window.RLQ||[]).push(function(){mw.loader.impl(function(){return["user.options@12s5i",function($,jQuery,require,module){mw.user.tokens.set({"patrolToken":"+\\","watchToken":"+\\","csrfToken":"+\\"}); }];});});</script> <link rel="stylesheet" href="/w/load.php?lang=en&modules=ext.cite.styles%7Cext.uls.interlanguage%7Cext.visualEditor.desktopArticleTarget.noscript%7Cext.wikimediaBadges%7Cext.wikimediamessages.styles%7Cjquery.makeCollapsible.styles%7Cskins.vector.icons%2Cstyles%7Cskins.vector.search.codex.styles%7Cwikibase.client.init&only=styles&skin=vector-2022"> <script async="" src="/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-2022"></script> <meta name="ResourceLoaderDynamicStyles" content=""> <link rel="stylesheet" href="/w/load.php?lang=en&modules=site.styles&only=styles&skin=vector-2022"> <meta name="generator" content="MediaWiki 1.44.0-wmf.16"> <meta name="referrer" content="origin"> <meta name="referrer" content="origin-when-cross-origin"> <meta name="robots" content="max-image-preview:standard"> <meta name="format-detection" content="telephone=no"> <meta name="viewport" content="width=1120"> <meta property="og:title" content="Specctra - Wikipedia"> <meta property="og:type" content="website"> <link rel="alternate" media="only screen and (max-width: 640px)" href="//en.m.wikipedia.org/wiki/Specctra"> <link rel="alternate" type="application/x-wiki" title="Edit this page" href="/w/index.php?title=Specctra&action=edit"> <link rel="apple-touch-icon" href="/static/apple-touch/wikipedia.png"> <link rel="icon" href="/static/favicon/wikipedia.ico"> <link rel="search" type="application/opensearchdescription+xml" href="/w/rest.php/v1/search" title="Wikipedia (en)"> <link rel="EditURI" type="application/rsd+xml" href="//en.wikipedia.org/w/api.php?action=rsd"> <link rel="canonical" href="https://en.wikipedia.org/wiki/Specctra"> <link rel="license" href="https://creativecommons.org/licenses/by-sa/4.0/deed.en"> <link rel="alternate" type="application/atom+xml" title="Wikipedia Atom feed" href="/w/index.php?title=Special:RecentChanges&feed=atom"> <link rel="dns-prefetch" href="//meta.wikimedia.org" /> <link rel="dns-prefetch" href="login.wikimedia.org"> </head> <body class="skin--responsive skin-vector skin-vector-search-vue mediawiki ltr sitedir-ltr mw-hide-empty-elt ns-0 ns-subject mw-editable page-Specctra rootpage-Specctra skin-vector-2022 action-view"><a class="mw-jump-link" href="#bodyContent">Jump to content</a> <div class="vector-header-container"> <header class="vector-header mw-header"> <div class="vector-header-start"> <nav class="vector-main-menu-landmark" aria-label="Site"> <div id="vector-main-menu-dropdown" class="vector-dropdown vector-main-menu-dropdown vector-button-flush-left vector-button-flush-right" title="Main menu" > <input type="checkbox" id="vector-main-menu-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-main-menu-dropdown" class="vector-dropdown-checkbox " aria-label="Main menu" > <label id="vector-main-menu-dropdown-label" for="vector-main-menu-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-menu mw-ui-icon-wikimedia-menu"></span> <span class="vector-dropdown-label-text">Main menu</span> </label> <div class="vector-dropdown-content"> <div id="vector-main-menu-unpinned-container" class="vector-unpinned-container"> <div id="vector-main-menu" class="vector-main-menu vector-pinnable-element"> <div class="vector-pinnable-header vector-main-menu-pinnable-header vector-pinnable-header-unpinned" data-feature-name="main-menu-pinned" data-pinnable-element-id="vector-main-menu" data-pinned-container-id="vector-main-menu-pinned-container" data-unpinned-container-id="vector-main-menu-unpinned-container" > <div class="vector-pinnable-header-label">Main menu</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-main-menu.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-main-menu.unpin">hide</button> </div> <div id="p-navigation" class="vector-menu mw-portlet mw-portlet-navigation" > <div class="vector-menu-heading"> Navigation </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-mainpage-description" class="mw-list-item"><a href="/wiki/Main_Page" title="Visit the main page [z]" accesskey="z"><span>Main page</span></a></li><li id="n-contents" class="mw-list-item"><a href="/wiki/Wikipedia:Contents" title="Guides to browsing Wikipedia"><span>Contents</span></a></li><li id="n-currentevents" class="mw-list-item"><a href="/wiki/Portal:Current_events" title="Articles related to current events"><span>Current events</span></a></li><li id="n-randompage" class="mw-list-item"><a href="/wiki/Special:Random" title="Visit a randomly selected article [x]" accesskey="x"><span>Random article</span></a></li><li id="n-aboutsite" class="mw-list-item"><a href="/wiki/Wikipedia:About" title="Learn about Wikipedia and how it works"><span>About Wikipedia</span></a></li><li id="n-contactpage" class="mw-list-item"><a href="//en.wikipedia.org/wiki/Wikipedia:Contact_us" title="How to contact Wikipedia"><span>Contact us</span></a></li> </ul> </div> </div> <div id="p-interaction" class="vector-menu mw-portlet mw-portlet-interaction" > <div class="vector-menu-heading"> Contribute </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-help" class="mw-list-item"><a href="/wiki/Help:Contents" title="Guidance on how to use and edit Wikipedia"><span>Help</span></a></li><li id="n-introduction" class="mw-list-item"><a href="/wiki/Help:Introduction" title="Learn how to edit Wikipedia"><span>Learn to edit</span></a></li><li id="n-portal" class="mw-list-item"><a href="/wiki/Wikipedia:Community_portal" title="The hub for editors"><span>Community portal</span></a></li><li id="n-recentchanges" class="mw-list-item"><a href="/wiki/Special:RecentChanges" title="A list of recent changes to Wikipedia [r]" accesskey="r"><span>Recent changes</span></a></li><li id="n-upload" class="mw-list-item"><a href="/wiki/Wikipedia:File_upload_wizard" title="Add images or other media for use on Wikipedia"><span>Upload file</span></a></li><li id="n-specialpages" class="mw-list-item"><a href="/wiki/Special:SpecialPages"><span>Special pages</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> <a href="/wiki/Main_Page" class="mw-logo"> <img class="mw-logo-icon" src="/static/images/icons/wikipedia.png" alt="" aria-hidden="true" height="50" width="50"> <span class="mw-logo-container skin-invert"> <img class="mw-logo-wordmark" alt="Wikipedia" src="/static/images/mobile/copyright/wikipedia-wordmark-en.svg" style="width: 7.5em; height: 1.125em;"> <img class="mw-logo-tagline" alt="The Free Encyclopedia" src="/static/images/mobile/copyright/wikipedia-tagline-en.svg" width="117" height="13" style="width: 7.3125em; height: 0.8125em;"> </span> </a> </div> <div class="vector-header-end"> <div id="p-search" role="search" class="vector-search-box-vue vector-search-box-collapses vector-search-box-show-thumbnail vector-search-box-auto-expand-width vector-search-box"> <a href="/wiki/Special:Search" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only search-toggle" title="Search Wikipedia [f]" accesskey="f"><span class="vector-icon mw-ui-icon-search mw-ui-icon-wikimedia-search"></span> <span>Search</span> </a> <div class="vector-typeahead-search-container"> <div class="cdx-typeahead-search cdx-typeahead-search--show-thumbnail cdx-typeahead-search--auto-expand-width"> <form action="/w/index.php" id="searchform" class="cdx-search-input cdx-search-input--has-end-button"> <div id="simpleSearch" class="cdx-search-input__input-wrapper" data-search-loc="header-moved"> <div class="cdx-text-input cdx-text-input--has-start-icon"> <input class="cdx-text-input__input" type="search" name="search" placeholder="Search Wikipedia" aria-label="Search Wikipedia" autocapitalize="sentences" title="Search Wikipedia [f]" accesskey="f" id="searchInput" > <span class="cdx-text-input__icon cdx-text-input__start-icon"></span> </div> <input type="hidden" name="title" value="Special:Search"> </div> <button class="cdx-button cdx-search-input__end-button">Search</button> </form> </div> </div> </div> <nav class="vector-user-links vector-user-links-wide" aria-label="Personal tools"> <div class="vector-user-links-main"> <div id="p-vector-user-menu-preferences" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-userpage" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <nav class="vector-appearance-landmark" aria-label="Appearance"> <div id="vector-appearance-dropdown" class="vector-dropdown " title="Change the appearance of the page's font size, width, and color" > <input type="checkbox" id="vector-appearance-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-appearance-dropdown" class="vector-dropdown-checkbox " aria-label="Appearance" > <label id="vector-appearance-dropdown-label" for="vector-appearance-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-appearance mw-ui-icon-wikimedia-appearance"></span> <span class="vector-dropdown-label-text">Appearance</span> </label> <div class="vector-dropdown-content"> <div id="vector-appearance-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <div id="p-vector-user-menu-notifications" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-overflow" class="vector-menu mw-portlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="https://donate.wikimedia.org/?wmf_source=donate&wmf_medium=sidebar&wmf_campaign=en.wikipedia.org&uselang=en" class=""><span>Donate</span></a> </li> <li id="pt-createaccount-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Special:CreateAccount&returnto=Specctra" title="You are encouraged to create an account and log in; however, it is not mandatory" class=""><span>Create account</span></a> </li> <li id="pt-login-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Special:UserLogin&returnto=Specctra" title="You're encouraged to log in; however, it's not mandatory. [o]" accesskey="o" class=""><span>Log in</span></a> </li> </ul> </div> </div> </div> <div id="vector-user-links-dropdown" class="vector-dropdown vector-user-menu vector-button-flush-right vector-user-menu-logged-out" title="Log in and more options" > <input type="checkbox" id="vector-user-links-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-user-links-dropdown" class="vector-dropdown-checkbox " aria-label="Personal tools" > <label id="vector-user-links-dropdown-label" for="vector-user-links-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-ellipsis mw-ui-icon-wikimedia-ellipsis"></span> <span class="vector-dropdown-label-text">Personal tools</span> </label> <div class="vector-dropdown-content"> <div id="p-personal" class="vector-menu mw-portlet mw-portlet-personal user-links-collapsible-item" title="User menu" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport" class="user-links-collapsible-item mw-list-item"><a href="https://donate.wikimedia.org/?wmf_source=donate&wmf_medium=sidebar&wmf_campaign=en.wikipedia.org&uselang=en"><span>Donate</span></a></li><li id="pt-createaccount" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Special:CreateAccount&returnto=Specctra" title="You are encouraged to create an account and log in; however, it is not mandatory"><span class="vector-icon mw-ui-icon-userAdd mw-ui-icon-wikimedia-userAdd"></span> <span>Create account</span></a></li><li id="pt-login" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Special:UserLogin&returnto=Specctra" title="You're encouraged to log in; however, it's not mandatory. [o]" accesskey="o"><span class="vector-icon mw-ui-icon-logIn mw-ui-icon-wikimedia-logIn"></span> <span>Log in</span></a></li> </ul> </div> </div> <div id="p-user-menu-anon-editor" class="vector-menu mw-portlet mw-portlet-user-menu-anon-editor" > <div class="vector-menu-heading"> Pages for logged out editors <a href="/wiki/Help:Introduction" aria-label="Learn more about editing"><span>learn more</span></a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/Special:MyContributions" title="A list of edits made from this IP address [y]" accesskey="y"><span>Contributions</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Special:MyTalk" title="Discussion about edits from this IP address [n]" accesskey="n"><span>Talk</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Site"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Contents" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Contents</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">hide</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">(Top)</div> </a> </li> <li id="toc-List_of_EDA_tools_supporting_Specctra" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#List_of_EDA_tools_supporting_Specctra"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>List of EDA tools supporting Specctra</span> </div> </a> <ul id="toc-List_of_EDA_tools_supporting_Specctra-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Further_reading" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Further_reading"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Further reading</span> </div> </a> <ul id="toc-Further_reading-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-External_links" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#External_links"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>External links</span> </div> </a> <ul id="toc-External_links-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" title="Table of Contents" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toggle the table of contents" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Toggle the table of contents</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Specctra</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Go to an article in another language. Available in 2 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-2" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">2 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/Specctra" title="Specctra – Russian" lang="ru" hreflang="ru" data-title="Specctra" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/Allegro_PCB_Router" title="Allegro PCB Router – Ukrainian" lang="uk" hreflang="uk" data-title="Allegro PCB Router" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q4049875#sitelinks-wikipedia" title="Edit interlanguage links" class="wbc-editpage">Edit links</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Namespaces"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Specctra" title="View the content page [c]" accesskey="c"><span>Article</span></a></li><li id="ca-talk" class="vector-tab-noicon mw-list-item"><a href="/wiki/Talk:Specctra" rel="discussion" title="Discuss improvements to the content page [t]" accesskey="t"><span>Talk</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Change language variant" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">English</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="Views"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Specctra"><span>Read</span></a></li><li id="ca-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Specctra&action=edit" title="Edit this page [e]" accesskey="e"><span>Edit</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Specctra&action=history" title="Past revisions of this page [h]" accesskey="h"><span>View history</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="Page tools"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="Tools" > <label id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Tools</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Tools</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">hide</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="More options" > <div class="vector-menu-heading"> Actions </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/Specctra"><span>Read</span></a></li><li id="ca-more-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Specctra&action=edit" title="Edit this page [e]" accesskey="e"><span>Edit</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Specctra&action=history"><span>View history</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> General </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Special:WhatLinksHere/Specctra" title="List of all English Wikipedia pages containing links to this page [j]" accesskey="j"><span>What links here</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Special:RecentChangesLinked/Specctra" rel="nofollow" title="Recent changes in pages linked from this page [k]" accesskey="k"><span>Related changes</span></a></li><li id="t-upload" class="mw-list-item"><a href="//en.wikipedia.org/wiki/Wikipedia:File_Upload_Wizard" title="Upload files [u]" accesskey="u"><span>Upload file</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Specctra&oldid=1258180675" title="Permanent link to this revision of this page"><span>Permanent link</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=Specctra&action=info" title="More information about this page"><span>Page information</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Special:CiteThisPage&page=Specctra&id=1258180675&wpFormIdentifier=titleform" title="Information on how to cite this page"><span>Cite this page</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Special:UrlShortener&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FSpecctra"><span>Get shortened URL</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Special:QrCode&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FSpecctra"><span>Download QR code</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> Print/export </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Special:DownloadAsPdf&page=Specctra&action=show-download-screen" title="Download this page as a PDF file"><span>Download as PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=Specctra&printable=yes" title="Printable version of this page [p]" accesskey="p"><span>Printable version</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> In other projects </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q4049875" title="Structured data on this page hosted by Wikidata [g]" accesskey="g"><span>Wikidata item</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Page tools"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Appearance"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Appearance</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">hide</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><p class="mw-empty-elt"> </p> <style data-mw-deduplicate="TemplateStyles:r1257001546">.mw-parser-output .infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox vevent"><caption class="infobox-title summary">Specctra / Allegro PCB Router</caption><tbody><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Programmer" title="Programmer">Original author(s)</a></th><td class="infobox-data">Cooper & Chyan Technology, Inc.</td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Programmer" title="Programmer">Developer(s)</a></th><td class="infobox-data"><a href="/wiki/Cadence_Design_Systems" title="Cadence Design Systems">Cadence Design Systems</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;">Initial release</th><td class="infobox-data">1989</td></tr><tr style="display: none;"><td colspan="2" class="infobox-full-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1257001546"></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Software_release_life_cycle" title="Software release life cycle">Stable release</a></th><td class="infobox-data"><div style="margin:0px;">17.4 – 22.1 / 20 October 2022<sup id="cite_ref-R5_1-0" class="reference"><a href="#cite_note-R5-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></div></td></tr><tr style="display:none"><td colspan="2"> </td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Operating_system" title="Operating system">Operating system</a></th><td class="infobox-data"><a href="/wiki/Unix" title="Unix">Unix</a>, <a href="/wiki/Windows" class="mw-redirect" title="Windows">Windows</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Software_categories#Categorization_approaches" title="Software categories">Type</a></th><td class="infobox-data">САD</td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Software_license" title="Software license">License</a></th><td class="infobox-data"><a href="/wiki/Proprietary_software" title="Proprietary software">Proprietary</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;">Website</th><td class="infobox-data"><a rel="nofollow" class="external free" href="http://www.cadence.com/">http://www.cadence.com/</a></td></tr></tbody></table> <p><b>Specctra</b> is a commercial PCB <a href="/wiki/Auto-router" class="mw-redirect" title="Auto-router">auto-router</a> originally developed by <a href="/w/index.php?title=John_F._Cooper&action=edit&redlink=1" class="new" title="John F. Cooper (page does not exist)">John F. Cooper</a> and <a href="/w/index.php?title=David_Chyan&action=edit&redlink=1" class="new" title="David Chyan (page does not exist)">David Chyan</a> of <a href="/w/index.php?title=Cooper_%26_Chyan_Technology,_Inc.&action=edit&redlink=1" class="new" title="Cooper & Chyan Technology, Inc. (page does not exist)">Cooper & Chyan Technology, Inc.</a> (CCT) in 1989.<sup id="cite_ref-R0_2-0" class="reference"><a href="#cite_note-R0-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> The company and product were taken over by <a href="/wiki/Cadence_Design_Systems" title="Cadence Design Systems">Cadence Design Systems</a> in May 1997.<sup id="cite_ref-R4_3-0" class="reference"><a href="#cite_note-R4-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-R0_2-1" class="reference"><a href="#cite_note-R0-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-R1_4-0" class="reference"><a href="#cite_note-R1-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> Since its integration into Cadence's Allegro PCB Editor, the name of the router is <b>Allegro PCB Router</b>. The latest version is 17.4 – 22.1 (20 October 2022). </p><p>Specctra routes boards by presenting graphical data using a "shape-based" technology which represents graphical objects not as a set of points-coordinates but more compact. This increases the efficiency of routing printed circuit boards with a high density of components, provides automatic routing of the same chain of tracks of different widths, and more. </p><p>Specctra uses adaptive algorithms implemented in multiple trace runs. The routing is carried out in three stages: </p> <ol><li>preview routing</li> <li>autoroute</li> <li>additional processing of autoroute results</li></ol> <p>On the first pass, the connection of all conductors is performed, regardless of the presence of conflicts, which consist in crossing the conductors on one layer and breaking the gaps. On each subsequent pass, the auto-router tries to reduce the number of conflicts by breaking and re-building connections (the <a href="/wiki/Ripup-and-retry_router" class="mw-redirect" title="Ripup-and-retry router">ripup-and-retry router</a> method) and pushing the conductors by pushing the neighboring ones (the <a href="/wiki/Push-and-shove_router" class="mw-redirect" title="Push-and-shove router">push-and-shove router</a> method). Electromagnetic compatibility can be tested in Specctra through the "SPECCTRAQuest SI Expert" module.<sup id="cite_ref-R2_5-0" class="reference"><a href="#cite_note-R2-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p><p>The program is compatible with many <a href="/wiki/Computer-aided_design" title="Computer-aided design">design systems</a> for printed circuit boards, thanks to the use of industrial-standard DSN design file format for project description and Do-files to specify routing strategies.<sup id="cite_ref-R3_6-0" class="reference"><a href="#cite_note-R3-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> The results are returned to the board editor via SES session files as well as RTE files. Protocol command execution is recorded in Did-file, which after editing can be used as new Do-files. </p><p>The DSN/SES file formats are also supported by a number of other auto-routers including <a href="/w/index.php?title=KONEKT_ELECTRA&action=edit&redlink=1" class="new" title="KONEKT ELECTRA (page does not exist)">KONEKT ELECTRA</a>,<sup id="cite_ref-ELECTRA_2017_7-0" class="reference"><a href="#cite_note-ELECTRA_2017-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> <a href="/wiki/Eremex_TopoR" class="mw-redirect" title="Eremex TopoR">Eremex TopoR</a>,<sup id="cite_ref-TopoR_2017_History_8-0" class="reference"><a href="#cite_note-TopoR_2017_History-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> Alfons Wirtz's <a href="/w/index.php?title=FreeRouting&action=edit&redlink=1" class="new" title="FreeRouting (page does not exist)">FreeRouting</a><sup id="cite_ref-FreeRouting_2014_9-0" class="reference"><a href="#cite_note-FreeRouting_2014-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> and <a href="/wiki/Reinforcement_learning" title="Reinforcement learning">RL</a>-based DeepPCB.<sup id="cite_ref-DeepPCB_10-0" class="reference"><a href="#cite_note-DeepPCB-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="List_of_EDA_tools_supporting_Specctra">List of EDA tools supporting Specctra</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Specctra&action=edit&section=1" title="Edit section: List of EDA tools supporting Specctra"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li>ACCEL PCB</li> <li><a href="/wiki/Cadence_Allegro" class="mw-redirect" title="Cadence Allegro">Cadence Allegro</a></li> <li>Cadnetix</li> <li>CADVANCE V / α</li> <li>DK-/DK-Magic</li> <li>DREAM CAD</li> <li><a href="/wiki/EAGLE_(program)" title="EAGLE (program)">EAGLE</a> (via BRD_TO_DSN.ULP etc.<sup id="cite_ref-EAGLE_2014_DSN_11-0" class="reference"><a href="#cite_note-EAGLE_2014_DSN-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Starr_2006_12-0" class="reference"><a href="#cite_note-Starr_2006-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup>)</li> <li>Easy-PC (via an optional interface)</li> <li><a href="/wiki/KiCad" title="KiCad">KiCad</a></li> <li><a href="/wiki/Mentor_BoardStation" class="mw-redirect" title="Mentor BoardStation">Mentor BoardStation</a></li> <li>MyPCB</li> <li><a href="/wiki/OrCAD_Layout" class="mw-redirect" title="OrCAD Layout">OrCAD Layout</a></li> <li>PADS Perform / PowerPCB</li> <li>PLANET</li> <li>PLASMA</li> <li><a href="/wiki/Protel_Advanced_PCB" class="mw-redirect" title="Protel Advanced PCB">Protel Advanced PCB</a></li> <li>Providence</li> <li>SCS-1</li> <li><a href="/wiki/TARGET_3001!" class="mw-redirect" title="TARGET 3001!">TARGET 3001!</a></li> <li>U-Art</li> <li><a href="/wiki/ULTIboard" class="mw-redirect" title="ULTIboard">ULTIboard</a></li> <li>Vanguard PCB</li> <li><a href="/wiki/Zuken_CR-3000" class="mw-redirect" title="Zuken CR-3000">Zuken CR-3000</a> / <a href="/wiki/CR-5000" title="CR-5000">CR-5000</a></li> <li><a href="/wiki/Zuken_Visula" class="mw-redirect" title="Zuken Visula">Zuken Visula</a> / <a href="/wiki/Zuken_CadStar" class="mw-redirect" title="Zuken CadStar">Zuken CadStar</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Specctra&action=edit&section=2" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/OrCAD" title="OrCAD">OrCAD</a></li> <li><a href="/wiki/Proteus_(EDA_tool)" class="mw-redirect" title="Proteus (EDA tool)">Proteus</a></li> <li><a href="/wiki/P-CAD" title="P-CAD">P-CAD</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Specctra&action=edit&section=3" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-R5-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-R5_1-0">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://community.cadence.com/cadence_blogs_8/b/pcb/posts/cadence-orcad-and-allegro-22-1-is-now-available">"Version 17.4 - 22.1 Released"</a>. <i>Cadence</i><span class="reference-accessdate">. Retrieved <span class="nowrap">2022-12-09</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Cadence&rft.atitle=Version+17.4+-+22.1+Released&rft_id=https%3A%2F%2Fcommunity.cadence.com%2Fcadence_blogs_8%2Fb%2Fpcb%2Fposts%2Fcadence-orcad-and-allegro-22-1-is-now-available&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASpecctra" class="Z3988"></span></span> </li> <li id="cite_note-R0-2"><span class="mw-cite-backlink">^ <a href="#cite_ref-R0_2-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-R0_2-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFGoering2005" class="citation web cs1">Goering, Richard (2005-08-22). <a rel="nofollow" class="external text" href="https://web.archive.org/web/20181022033510/https://www.embedded.com/print/4054945">"EDA pioneer takes startup to new routing ground"</a>. Archived from <a rel="nofollow" class="external text" href="https://www.embedded.com/print/4054945">the original</a> on 2018-10-22.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=EDA+pioneer+takes+startup+to+new+routing+ground&rft.date=2005-08-22&rft.aulast=Goering&rft.aufirst=Richard&rft_id=https%3A%2F%2Fwww.embedded.com%2Fprint%2F4054945&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASpecctra" class="Z3988"></span></span> </li> <li id="cite_note-R4-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-R4_3-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFEDN_staff1996" class="citation web cs1">EDN staff (1996-11-21). <a rel="nofollow" class="external text" href="https://www.edn.com/electronics-news/4340410/Cadence-Cooper--Chyan-to-merge">"Cadence, Cooper & Chyan to merge"</a>. <i>EDN</i><span class="reference-accessdate">. Retrieved <span class="nowrap">2022-11-14</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=EDN&rft.atitle=Cadence%2C+Cooper+%26+Chyan+to+merge&rft.date=1996-11-21&rft.au=EDN+staff&rft_id=https%3A%2F%2Fwww.edn.com%2Felectronics-news%2F4340410%2FCadence-Cooper--Chyan-to-merge&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASpecctra" class="Z3988"></span></span> </li> <li id="cite_note-R1-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-R1_4-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.cadence.com/products/pcb/pcb_design/pages/default.aspx">"Allegro PCB Designer - Constraint-driven PCB design"</a>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20221114154417/https://www.cadence.com/en_US/home/tools/pcb-design-and-analysis.html">Archived</a> from the original on 2022-11-14<span class="reference-accessdate">. Retrieved <span class="nowrap">2022-11-14</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Allegro+PCB+Designer+-+Constraint-driven+PCB+design&rft_id=http%3A%2F%2Fwww.cadence.com%2Fproducts%2Fpcb%2Fpcb_design%2Fpages%2Fdefault.aspx&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASpecctra" class="Z3988"></span></span> </li> <li id="cite_note-R2-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-R2_5-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFYolshin2006" class="citation journal cs1">Yolshin, Y. (2006). "Specctra-practical experience system. Tracer Cadence Specctra expert // Components and Technologies" (58).</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=Specctra-practical+experience+system.+Tracer+Cadence+Specctra+expert+%2F%2F+Components+and+Technologies&rft.issue=58&rft.date=2006&rft.aulast=Yolshin&rft.aufirst=Y.&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASpecctra" class="Z3988"></span> <span class="cs1-visible-error citation-comment"><code class="cs1-code">{{<a href="/wiki/Template:Cite_journal" title="Template:Cite journal">cite journal</a>}}</code>: </span><span class="cs1-visible-error citation-comment">Cite journal requires <code class="cs1-code">|journal=</code> (<a href="/wiki/Help:CS1_errors#missing_periodical" title="Help:CS1 errors">help</a>)</span></span> </li> <li id="cite_note-R3-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-R3_6-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://plmpedia.ru/wiki/Spectra">"Spectra PLMpedia"</a>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20200223210806/http://plmpedia.ru/wiki/Spectra">Archived</a> from the original on 2020-02-23<span class="reference-accessdate">. Retrieved <span class="nowrap">2022-11-14</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Spectra+PLMpedia&rft_id=http%3A%2F%2Fplmpedia.ru%2Fwiki%2FSpectra&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASpecctra" class="Z3988"></span></span> </li> <li id="cite_note-ELECTRA_2017-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-ELECTRA_2017_7-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://konekt.com/c5/index.php/resources/">"KONEKT Shape Based PCB Autorouting - ELECTRA PCB AutoRouting"</a>. KONEKT. 2017. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20170923224640/http://konekt.com/c5/index.php">Archived</a> from the original on 2017-09-23<span class="reference-accessdate">. Retrieved <span class="nowrap">2017-09-24</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=KONEKT+Shape+Based+PCB+Autorouting+-+ELECTRA+PCB+AutoRouting&rft.pub=KONEKT&rft.date=2017&rft_id=http%3A%2F%2Fkonekt.com%2Fc5%2Findex.php%2Fresources%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASpecctra" class="Z3988"></span></span> </li> <li id="cite_note-TopoR_2017_History-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-TopoR_2017_History_8-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://eda.eremex.com/support/versionhistory.html">"TopoR Version History - What's New in TopoR version 6.2"</a>. <a href="/wiki/Eremex" class="mw-redirect" title="Eremex">Eremex</a>. 2017-09-24. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20170924125515/http://eda.eremex.com/support/versionhistory.html">Archived</a> from the original on 2017-09-24<span class="reference-accessdate">. Retrieved <span class="nowrap">2017-09-24</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=TopoR+Version+History+-+What%27s+New+in+TopoR+version+6.2&rft.pub=Eremex&rft.date=2017-09-24&rft_id=http%3A%2F%2Feda.eremex.com%2Fsupport%2Fversionhistory.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASpecctra" class="Z3988"></span> (NB. Includes a list of new features since TopoR 3.0.)</span> </li> <li id="cite_note-FreeRouting_2014-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-FreeRouting_2014_9-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFWirtz2014" class="citation web cs1">Wirtz, Alfons (2014-03-08) [2004]. <a rel="nofollow" class="external text" href="https://github.com/nikropht/FreeRouting">"FreeRouting - Printed Circuit Board Routing Software from FreeRouting.net"</a>. <i><a href="/wiki/GitHub" title="GitHub">GitHub</a></i>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20170923230146/https://github.com/nikropht/FreeRouting">Archived</a> from the original on 2017-09-23<span class="reference-accessdate">. Retrieved <span class="nowrap">2017-09-24</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=GitHub&rft.atitle=FreeRouting+-+Printed+Circuit+Board+Routing+Software+from+FreeRouting.net&rft.date=2014-03-08&rft.aulast=Wirtz&rft.aufirst=Alfons&rft_id=https%3A%2F%2Fgithub.com%2Fnikropht%2FFreeRouting&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASpecctra" class="Z3988"></span></span> </li> <li id="cite_note-DeepPCB-10"><span class="mw-cite-backlink"><b><a href="#cite_ref-DeepPCB_10-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://deeppcb.ai">"DeepPCB: Pure AI-Powered Cloud Native PCB Routing"</a>. <i>DeepPCB</i>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20220827022616/https://deeppcb.ai/">Archived</a> from the original on 2022-08-27<span class="reference-accessdate">. Retrieved <span class="nowrap">2022-11-14</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=DeepPCB&rft.atitle=DeepPCB%3A+Pure+AI-Powered+Cloud+Native+PCB+Routing&rft_id=https%3A%2F%2Fdeeppcb.ai&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASpecctra" class="Z3988"></span></span> </li> <li id="cite_note-EAGLE_2014_DSN-11"><span class="mw-cite-backlink"><b><a href="#cite_ref-EAGLE_2014_DSN_11-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFElco2014" class="citation web cs1">Elco (2014-03-08) [2013-06-04, 2011-12-15]. <a rel="nofollow" class="external text" href="http://eagle.autodesk.com/eagle/ulp?utf8=%E2%9C%93&q%5Btitle_or_author_or_description_cont%5D=dsn&button=">"eagle2freerouter-8-march-2014.zip / eagle2freerouter.ulp / brd_to_dsn_v6.ulp"</a>. EAGLE Support: User Language Programs (ULP). <a href="/wiki/Autodesk" title="Autodesk">Autodesk</a>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20210428095319/http://eagle.autodesk.com/eagle/ulp?utf8=%E2%9C%93&q%5btitle_or_author_or_description_cont%5d=dsn&button=">Archived</a> from the original on 2021-04-28<span class="reference-accessdate">. Retrieved <span class="nowrap">2022-01-01</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=eagle2freerouter-8-march-2014.zip+%2F+eagle2freerouter.ulp+%2F+brd_to_dsn_v6.ulp&rft.pub=Autodesk&rft.date=2014-03-08&rft.au=Elco&rft_id=http%3A%2F%2Feagle.autodesk.com%2Feagle%2Fulp%3Futf8%3D%25E2%259C%2593%26q%255Btitle_or_author_or_description_cont%255D%3Ddsn%26button%3D&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASpecctra" class="Z3988"></span></span> </li> <li id="cite_note-Starr_2006-12"><span class="mw-cite-backlink"><b><a href="#cite_ref-Starr_2006_12-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFStarr2006" class="citation web cs1">Starr, Robert (2006-02-22). <a rel="nofollow" class="external text" href="https://github.com/robertstarr/ulp_user/blob/master/brd_to_dsn.ulp">"ulp_user/brd_to_dsn.ulp"</a>. <i><a href="/wiki/GitHub" title="GitHub">GitHub</a></i>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20210422181554/https://github.com/robertstarr/ulp_user/blob/master/brd_to_dsn.ulp">Archived</a> from the original on 2021-04-22<span class="reference-accessdate">. Retrieved <span class="nowrap">2022-01-01</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=GitHub&rft.atitle=ulp_user%2Fbrd_to_dsn.ulp&rft.date=2006-02-22&rft.aulast=Starr&rft.aufirst=Robert&rft_id=https%3A%2F%2Fgithub.com%2Frobertstarr%2Fulp_user%2Fblob%2Fmaster%2Fbrd_to_dsn.ulp&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASpecctra" class="Z3988"></span></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="Further_reading">Further reading</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Specctra&action=edit&section=4" title="Edit section: Further reading"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20181021232440/http://quote.morningstar.com/stock-filing/Annual-Report/1997/12/28/t.aspx?t=XNAS:CDNS&ft=10-K&d=0e64b5a67b2c7b4d">"XNAS:CDNS Cadence Design Systems Inc Annual Report"</a>. <i>Morning Star</i>. 1997-12-28. Archived from <a rel="nofollow" class="external text" href="http://quote.morningstar.com/stock-filing/Annual-Report/1997/12/28/t.aspx?t=XNAS:CDNS&ft=10-K&d=0e64b5a67b2c7b4d">the original</a> on 2018-10-21.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Morning+Star&rft.atitle=XNAS%3ACDNS+Cadence+Design+Systems+Inc+Annual+Report&rft.date=1997-12-28&rft_id=http%3A%2F%2Fquote.morningstar.com%2Fstock-filing%2FAnnual-Report%2F1997%2F12%2F28%2Ft.aspx%3Ft%3DXNAS%3ACDNS%26ft%3D10-K%26d%3D0e64b5a67b2c7b4d&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASpecctra" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://semiengineering.com/entities/cooper-and-chyan-technology-inc/">"Cooper and Chyan Technology Inc. - -Shape-based autorouter for PCB"</a>. 2014-05-07. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20200530060719/https://semiengineering.com/entities/cooper-and-chyan-technology-inc/">Archived</a> from the original on 2020-05-30<span class="reference-accessdate">. Retrieved <span class="nowrap">2022-11-14</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Cooper+and+Chyan+Technology+Inc.+-+-Shape-based+autorouter+for+PCB&rft.date=2014-05-07&rft_id=https%3A%2F%2Fsemiengineering.com%2Fentities%2Fcooper-and-chyan-technology-inc%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASpecctra" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.adapticom1.net/web/cooper-chyan-router.html">"David Chyan of Cadence Receives Gene Marsh Award for Technical Innovation at PCB Design Conference East"</a>. San Jose, California, USA. 1999-10-29. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20221114155657/http://www.adapticom1.net/web/cooper-chyan-router.html">Archived</a> from the original on 2022-11-14<span class="reference-accessdate">. Retrieved <span class="nowrap">2022-11-14</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=David+Chyan+of+Cadence+Receives+Gene+Marsh+Award+for+Technical+Innovation+at+PCB+Design+Conference+East&rft.place=San+Jose%2C+California%2C+USA&rft.date=1999-10-29&rft_id=http%3A%2F%2Fwww.adapticom1.net%2Fweb%2Fcooper-chyan-router.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASpecctra" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.jlab.org/accel/eecad/manuals/Interface.pdf">"Interface for SPECCTRA"</a> <span class="cs1-format">(PDF)</span>. <i>p-cad 2002</i>. <a href="/wiki/Altium_Limited" class="mw-redirect" title="Altium Limited">Altium Limited</a>. 2002. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20181023032225/https://www.jlab.org/accel/eecad/manuals/Interface.pdf">Archived</a> <span class="cs1-format">(PDF)</span> from the original on 2018-10-23<span class="reference-accessdate">. Retrieved <span class="nowrap">2022-11-14</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=p-cad+2002&rft.atitle=Interface+for+SPECCTRA&rft.date=2002&rft_id=https%3A%2F%2Fwww.jlab.org%2Faccel%2Feecad%2Fmanuals%2FInterface.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASpecctra" class="Z3988"></span> (16 pages)</li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://community.cadence.com/cfs-file/__key/telligent-evolution-components-attachments/00-27-01-00-00-00-51-96/specctraWN.pdf">"Allegro PCB Router: What's New in Release 15.5.1"</a> <span class="cs1-format">(PDF)</span>. 15.5.1. December 2005. <a rel="nofollow" class="external text" href="https://archive.today/20181101192747/https://community.cadence.com/cfs-file/__key/telligent-evolution-components-attachments/00-27-01-00-00-00-51-96/specctraWN.pdf">Archived</a> <span class="cs1-format">(PDF)</span> from the original on 2018-11-01<span class="reference-accessdate">. Retrieved <span class="nowrap">2022-11-14</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Allegro+PCB+Router%3A+What%27s+New+in+Release+15.5.1&rft.series=15.5.1&rft.date=2005-12&rft_id=https%3A%2F%2Fcommunity.cadence.com%2Fcfs-file%2F__key%2Ftelligent-evolution-components-attachments%2F00-27-01-00-00-00-51-96%2FspecctraWN.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASpecctra" class="Z3988"></span></li></ul> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Specctra&action=edit&section=5" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external free" href="http://www.cadence.com/products/pcb/pcb_design/pages/default.aspx">http://www.cadence.com/products/pcb/pcb_design/pages/default.aspx</a> Official website</li> <li><a rel="nofollow" class="external free" href="http://www.dsioffe.narod.ru/myspecctra">http://www.dsioffe.narod.ru/myspecctra</a></li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl ul,.mw-parser-output .hlist ol dl,.mw-parser-output .hlist ol ol,.mw-parser-output .hlist ol ul,.mw-parser-output .hlist ul dl,.mw-parser-output .hlist ul ol,.mw-parser-output .hlist ul ul{display:inline}.mw-parser-output .hlist .mw-empty-li{display:none}.mw-parser-output .hlist dt::after{content:": "}.mw-parser-output .hlist dd::after,.mw-parser-output .hlist li::after{content:" · ";font-weight:bold}.mw-parser-output .hlist dd:last-child::after,.mw-parser-output .hlist dt:last-child::after,.mw-parser-output .hlist li:last-child::after{content:none}.mw-parser-output .hlist dd dd:first-child::before,.mw-parser-output .hlist dd dt:first-child::before,.mw-parser-output .hlist dd li:first-child::before,.mw-parser-output .hlist dt dd:first-child::before,.mw-parser-output .hlist dt dt:first-child::before,.mw-parser-output .hlist dt li:first-child::before,.mw-parser-output .hlist li dd:first-child::before,.mw-parser-output .hlist li dt:first-child::before,.mw-parser-output .hlist li li:first-child::before{content:" (";font-weight:normal}.mw-parser-output .hlist dd dd:last-child::after,.mw-parser-output .hlist dd dt:last-child::after,.mw-parser-output .hlist dd li:last-child::after,.mw-parser-output .hlist dt dd:last-child::after,.mw-parser-output .hlist dt dt:last-child::after,.mw-parser-output .hlist dt li:last-child::after,.mw-parser-output .hlist li dd:last-child::after,.mw-parser-output .hlist li dt:last-child::after,.mw-parser-output .hlist li li:last-child::after{content:")";font-weight:normal}.mw-parser-output .hlist ol{counter-reset:listitem}.mw-parser-output .hlist ol>li{counter-increment:listitem}.mw-parser-output .hlist ol>li::before{content:" "counter(listitem)"\a0 "}.mw-parser-output .hlist dd ol>li:first-child::before,.mw-parser-output .hlist dt ol>li:first-child::before,.mw-parser-output .hlist li ol>li:first-child::before{content:" ("counter(listitem)"\a0 "}</style><style data-mw-deduplicate="TemplateStyles:r1236075235">.mw-parser-output .navbox{box-sizing:border-box;border:1px solid #a2a9b1;width:100%;clear:both;font-size:88%;text-align:center;padding:1px;margin:1em auto 0}.mw-parser-output .navbox .navbox{margin-top:0}.mw-parser-output .navbox+.navbox,.mw-parser-output .navbox+.navbox-styles+.navbox{margin-top:-1px}.mw-parser-output .navbox-inner,.mw-parser-output .navbox-subgroup{width:100%}.mw-parser-output .navbox-group,.mw-parser-output .navbox-title,.mw-parser-output .navbox-abovebelow{padding:0.25em 1em;line-height:1.5em;text-align:center}.mw-parser-output .navbox-group{white-space:nowrap;text-align:right}.mw-parser-output .navbox,.mw-parser-output .navbox-subgroup{background-color:#fdfdfd}.mw-parser-output .navbox-list{line-height:1.5em;border-color:#fdfdfd}.mw-parser-output .navbox-list-with-group{text-align:left;border-left-width:2px;border-left-style:solid}.mw-parser-output tr+tr>.navbox-abovebelow,.mw-parser-output tr+tr>.navbox-group,.mw-parser-output tr+tr>.navbox-image,.mw-parser-output tr+tr>.navbox-list{border-top:2px solid #fdfdfd}.mw-parser-output .navbox-title{background-color:#ccf}.mw-parser-output .navbox-abovebelow,.mw-parser-output .navbox-group,.mw-parser-output .navbox-subgroup .navbox-title{background-color:#ddf}.mw-parser-output .navbox-subgroup .navbox-group,.mw-parser-output .navbox-subgroup .navbox-abovebelow{background-color:#e6e6ff}.mw-parser-output .navbox-even{background-color:#f7f7f7}.mw-parser-output .navbox-odd{background-color:transparent}.mw-parser-output .navbox .hlist td dl,.mw-parser-output .navbox .hlist td ol,.mw-parser-output .navbox .hlist td ul,.mw-parser-output .navbox td.hlist dl,.mw-parser-output .navbox td.hlist ol,.mw-parser-output .navbox td.hlist ul{padding:0.125em 0}.mw-parser-output .navbox .navbar{display:block;font-size:100%}.mw-parser-output .navbox-title .navbar{float:left;text-align:left;margin-right:0.5em}body.skin--responsive .mw-parser-output .navbox-image img{max-width:none!important}@media print{body.ns-0 .mw-parser-output .navbox{display:none!important}}</style></div><div role="navigation" class="navbox" aria-labelledby="Computer-aided_design_(CAD)_software385" style="padding:3px"><table class="nowraplinks mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><style data-mw-deduplicate="TemplateStyles:r1239400231">.mw-parser-output .navbar{display:inline;font-size:88%;font-weight:normal}.mw-parser-output .navbar-collapse{float:left;text-align:left}.mw-parser-output .navbar-boxtext{word-spacing:0}.mw-parser-output .navbar ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:"[ "}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:" ]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini abbr{font-variant:small-caps;border-bottom:none;text-decoration:none;cursor:inherit}.mw-parser-output .navbar-ct-full{font-size:114%;margin:0 7em}.mw-parser-output .navbar-ct-mini{font-size:114%;margin:0 4em}html.skin-theme-clientpref-night .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:CAD_software" title="Template:CAD software"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:CAD_software" title="Template talk:CAD software"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:CAD_software" title="Special:EditPage/Template:CAD software"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Computer-aided_design_(CAD)_software385" style="font-size:114%;margin:0 4em"><a href="/wiki/Computer-aided_design" title="Computer-aided design">Computer-aided design</a> (CAD) software</div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Free_and_open-source_software" title="Free and open-source software">Free and<br />open-source</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Mechanical_systems_drawing" title="Mechanical systems drawing">Mechanical</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/BRL-CAD" title="BRL-CAD">BRL-CAD</a></li> <li><a href="/wiki/FreeCAD" title="FreeCAD">FreeCAD</a></li> <li><a href="/wiki/HeeksCAD" title="HeeksCAD">HeeksCAD</a></li> <li><a href="/wiki/LibreCAD" title="LibreCAD">LibreCAD</a></li> <li><a href="/wiki/Open_Cascade_Technology" title="Open Cascade Technology">Open Cascade Technology</a></li> <li><a href="/wiki/OpenSCAD" title="OpenSCAD">OpenSCAD</a></li> <li><a href="/wiki/OpenVSP" title="OpenVSP">OpenVSP</a></li> <li><a href="/wiki/QCAD" title="QCAD">QCAD</a></li> <li><a href="/wiki/RattleCAD" title="RattleCAD">rattleCAD</a></li> <li><a href="/wiki/Salome_(software)" title="Salome (software)">Salome</a></li> <li><a href="/wiki/SolveSpace" title="SolveSpace">SolveSpace</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Electronic_design_automation" title="Electronic design automation">Electrical</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Electric_(software)" title="Electric (software)">Electric</a></li> <li><a href="/wiki/FreePCB" title="FreePCB">FreePCB</a></li> <li><a href="/wiki/Fritzing" title="Fritzing">Fritzing</a></li> <li><a href="/wiki/GEDA" title="GEDA">gEDA</a></li> <li>Horizon EDA</li> <li><a href="/wiki/KiCad" title="KiCad">KiCad</a></li> <li><a href="/wiki/KTechLab" title="KTechLab">kTechLab</a></li> <li><a href="/wiki/Magic_(software)" title="Magic (software)">Magic</a></li> <li><a href="/wiki/Ngspice" title="Ngspice">ngspice</a></li> <li><a href="/wiki/Oregano_(software)" title="Oregano (software)">Oregano</a></li> <li><a href="/wiki/Pcb-rnd" title="Pcb-rnd">pcb-rnd</a></li> <li><a href="/wiki/Quite_Universal_Circuit_Simulator" title="Quite Universal Circuit Simulator">QUCS</a></li> <li><a href="/wiki/SPICE" title="SPICE">SPICE</a></li> <li><a href="/wiki/XCircuit" title="XCircuit">XCircuit</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Proprietary_software" title="Proprietary software">Proprietary</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Mechanical_systems_drawing" title="Mechanical systems drawing">Mechanical</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/ABViewer" title="ABViewer">ABViewer</a></li> <li><a href="/wiki/Alibre_Design" title="Alibre Design">Alibre Design</a></li> <li><a href="/wiki/Archicad" title="Archicad">Archicad</a></li> <li><a href="/wiki/AutoCAD" title="AutoCAD">AutoCAD</a></li> <li><a href="/wiki/Autodesk_Alias" title="Autodesk Alias">Autodesk Alias</a></li> <li><a href="/wiki/Autodesk_Inventor" title="Autodesk Inventor">Autodesk Inventor</a></li> <li><a href="/wiki/Autodesk_Revit" title="Autodesk Revit">Autodesk Revit</a></li> <li><a href="/wiki/AutoTURN" title="AutoTURN">AutoTURN</a></li> <li><a href="/wiki/BricsCAD" title="BricsCAD">BricsCAD</a></li> <li><a href="/wiki/CATIA" title="CATIA">CATIA</a></li> <li><a href="/wiki/Cimatron" title="Cimatron">Cimatron</a></li> <li><a href="/wiki/Cobalt_(CAD_program)" title="Cobalt (CAD program)">Cobalt</a></li> <li><a href="/wiki/PTC_Creo_Elements/Direct_Drafting" title="PTC Creo Elements/Direct Drafting">Creo Elements/Direct Drafting</a>, <a href="/wiki/Creo_Parametric" title="Creo Parametric">Creo Parametric</a></li> <li><a href="/wiki/DesignSpark_Mechanical" title="DesignSpark Mechanical">DesignSpark Mechanical</a></li> <li><a href="/wiki/FastCAD" title="FastCAD">FastCAD</a> (EasyCAD)</li> <li><a href="/wiki/FINE_MEP" title="FINE MEP">FINE</a></li> <li><a href="/wiki/FORAN_System" title="FORAN System">FORAN</a></li> <li><a href="/wiki/Fusion_360" title="Fusion 360">Fusion 360</a></li> <li><a href="/wiki/GstarCAD" title="GstarCAD">GstarCAD</a></li> <li><a href="/wiki/IRONCAD" title="IRONCAD">IRONCAD</a></li> <li><a href="/wiki/KeyCreator" title="KeyCreator">KeyCreator</a> (<i><a href="/wiki/CADKEY" title="CADKEY">CADKEY</a></i>)</li> <li><a href="/wiki/MEDUSA4" title="MEDUSA4">MEDUSA4</a></li> <li><a href="/wiki/MicroStation" title="MicroStation">MicroStation</a></li> <li><a href="/wiki/Siemens_NX" title="Siemens NX">NX</a></li> <li><a href="/wiki/Onshape" title="Onshape">Onshape</a></li> <li><a href="/wiki/PDMS_(software)" title="PDMS (software)">PDMS</a></li> <li><a href="/wiki/Pro/DESKTOP" title="Pro/DESKTOP">Pro/DESKTOP</a></li> <li><a href="/wiki/Rhinoceros_3D" title="Rhinoceros 3D">Rhinoceros 3D</a> <ul><li><a href="/wiki/Grasshopper_3D" title="Grasshopper 3D">Grasshopper 3D</a></li></ul></li> <li><a href="/wiki/RattleCAD#Source_closing" title="RattleCAD">rattleCAD 4.0</a></li> <li><a href="/wiki/Shapr3D" title="Shapr3D">Shapr3D</a></li> <li><a href="/wiki/Solid_Edge" title="Solid Edge">Solid Edge</a></li> <li><a href="/wiki/SolidWorks" title="SolidWorks">SolidWorks</a></li> <li><i><a href="/wiki/Sonata_(building_design_software)" title="Sonata (building design software)">Sonata</a></i> (<i><a href="/wiki/RUCAPS" title="RUCAPS">RUCAPS</a></i>)</li> <li><a href="/wiki/SpaceClaim" title="SpaceClaim">SpaceClaim</a></li> <li><a href="/wiki/T-FLEX_CAD" title="T-FLEX CAD">T-FLEX CAD</a></li> <li><a href="/wiki/Tinkercad" title="Tinkercad">Tinkercad</a></li> <li><a href="/wiki/TurboCAD" title="TurboCAD">TurboCAD</a></li> <li><a href="/wiki/VariCAD" title="VariCAD">VariCAD</a></li> <li><a href="/wiki/ZWCAD" title="ZWCAD">ZWCAD</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Electronic_design_automation" title="Electronic design automation">Electrical</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Allegro_(CAD_software)" class="mw-redirect" title="Allegro (CAD software)">Allegro</a> (<i><a href="/wiki/OrCAD" title="OrCAD">OrCAD</a></i>)</li> <li><a href="/wiki/Altium_Designer" title="Altium Designer">Altium Designer</a> (<i><a href="/wiki/Altium#History" title="Altium">Protel</a></i> (<i><a href="/wiki/Autotrax" title="Autotrax">Autotrax</a></i> (<i>Easytrax</i>, <i>Tango PCB</i>)), <i><a href="/wiki/P-CAD" title="P-CAD">P-CAD</a></i>)</li> <li><a href="/wiki/AutoCAD" title="AutoCAD">AutoCAD</a> Electrical</li> <li><a href="/wiki/Mentor_Graphics" title="Mentor Graphics">BoardStation, IntegraStation, PADS, Xpedition</a></li> <li><a href="/wiki/CADSTAR" title="CADSTAR">CADSTAR</a></li> <li><a href="/wiki/CircuitMaker" title="CircuitMaker">CircuitMaker</a></li> <li><a href="/wiki/Zuken" title="Zuken">CR-2000, CR-3000</a>, <a href="/wiki/CR-5000" title="CR-5000">CR-5000</a>, <a href="/wiki/CR-8000" title="CR-8000">CR-8000</a></li> <li><a href="/wiki/DesignSpark_PCB" title="DesignSpark PCB">DesignSpark PCB</a></li> <li><a href="/wiki/DipTrace" title="DipTrace">DipTrace</a></li> <li><a href="/wiki/EAGLE_(program)" title="EAGLE (program)">EAGLE</a></li> <li><a href="/wiki/EasyEDA" title="EasyEDA">EasyEDA</a></li> <li><a href="/wiki/LTspice" title="LTspice">LTspice</a></li> <li><i><a href="/wiki/Micro-Cap" title="Micro-Cap">Micro-Cap</a></i></li> <li><a href="/wiki/NI_Multisim" title="NI Multisim">Multisim</a></li> <li><a href="/wiki/PCB_(software)" title="PCB (software)">PCB</a></li> <li><a href="/wiki/Proteus_Design_Suite" title="Proteus Design Suite">Proteus</a></li> <li><a href="/wiki/Pulsonix" title="Pulsonix">Pulsonix</a></li> <li><a href="/wiki/SolidWorks" title="SolidWorks">SolidWorks</a> Electrical</li> <li><a href="/wiki/TARGET_(CAD_software)" title="TARGET (CAD software)">TARGET</a></li> <li><a href="/wiki/TopoR" title="TopoR">TopoR</a> (<a href="/wiki/TopoR#Features" title="TopoR">Delta Design</a>, <i><a href="/wiki/TopoR#History" title="TopoR">FreeStyle</a></i>)</li> <li><a href="/wiki/NI_Ultiboard" title="NI Ultiboard">Ultiboard</a></li> <li><a href="/wiki/Upverter" title="Upverter">Upverter</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/File_format" title="File format">File formats</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/3D_Manufacturing_Format" title="3D Manufacturing Format">3MF</a></li> <li><a href="/wiki/ACIS#File_format" title="ACIS">ACIS</a></li> <li><a href="/wiki/Additive_manufacturing_file_format" title="Additive manufacturing file format">AMF</a></li> <li><a href="/wiki/C3D_Toolkit" title="C3D Toolkit">C3D</a></li> <li><a href="/wiki/KeyCreator" title="KeyCreator">CKD</a></li> <li><a class="mw-selflink selflink">DSN</a></li> <li><a href="/wiki/Design_Web_Format" title="Design Web Format">DWF</a></li> <li><a href="/wiki/Open_Packaging_Conventions" title="Open Packaging Conventions">DWFX</a></li> <li><a href="/wiki/.dwg" title=".dwg">DWG</a></li> <li><a href="/wiki/AutoCAD_DXF" title="AutoCAD DXF">DXF</a></li> <li><a href="/wiki/IGES" title="IGES">IGES</a></li> <li><a href="/wiki/Wavefront_.obj_file" title="Wavefront .obj file">OBJ</a></li> <li><a href="/wiki/Open_Design_Alliance" title="Open Design Alliance">OpenDWG</a></li> <li><a href="/wiki/PLY_(file_format)" title="PLY (file format)">PLY</a></li> <li><a href="/wiki/OrCAD#OrCAD_PSpice" title="OrCAD">PSpice</a></li> <li><a class="mw-selflink selflink">SES</a></li> <li><a href="/wiki/ISO_10303" title="ISO 10303">STEP</a></li> <li><a href="/wiki/STL_(file_format)" title="STL (file format)">STL</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Geometric_modeling_kernel" title="Geometric modeling kernel">Modeling<br />kernels</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/ACIS" title="ACIS">ACIS</a></li> <li><a href="/wiki/C3D_Toolkit" title="C3D Toolkit">C3D</a></li> <li><a href="/wiki/Digital_Geometric_Kernel" title="Digital Geometric Kernel">Digital Geometric Kernel</a> (<i>KernelCAD</i>)</li> <li><a href="/wiki/IntelliCAD" title="IntelliCAD">IntelliCAD</a></li> <li><a href="/wiki/Open_Cascade_Technology" title="Open Cascade Technology">Open Cascade Technology</a></li> <li><a href="/wiki/Open_Design_Alliance" title="Open Design Alliance">Open Design Alliance</a> (<i>Teigha</i>)</li> <li><a href="/wiki/Romulus_(modelling_kernel)" title="Romulus (modelling kernel)">Romulus</a> (<a href="/wiki/Parasolid" title="Parasolid">Parasolid</a>)</li> <li><a href="/wiki/Russian_Geometric_Kernel" title="Russian Geometric Kernel">RGK</a></li> <li><a href="/wiki/ShapeManager" title="ShapeManager">ShapeManager</a></li> <li><a href="/wiki/Solid_Modeling_Solutions" title="Solid Modeling Solutions">SMLib</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Historic</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><i><a href="/wiki/DAC-1" title="DAC-1">DAC-1</a></i> (1963)</li> <li><i><a href="/wiki/Sketchpad" title="Sketchpad">Sketchpad</a></i> (1963)</li> <li><a href="/wiki/UNISURF" title="UNISURF">UNISURF</a> (1968)</li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div><i>Italics</i> <b>= discontinued</b><br /><a href="/wiki/Computer-aided_industrial_design" title="Computer-aided industrial design">Computer-aided industrial design</a> • <a href="/wiki/Comparison_of_computer-aided_design_software" title="Comparison of computer-aided design software">Comparison</a> • <a href="/wiki/History_of_CAD_software" title="History of CAD software">History</a></div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?useformat=desktop&type=1x1&usesul3=0" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=Specctra&oldid=1258180675">https://en.wikipedia.org/w/index.php?title=Specctra&oldid=1258180675</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Help:Category" title="Help:Category">Category</a>: <ul><li><a href="/wiki/Category:Electronic_design_automation_software" title="Category:Electronic design automation software">Electronic design automation software</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Hidden categories: <ul><li><a href="/wiki/Category:CS1_errors:_missing_periodical" title="Category:CS1 errors: missing periodical">CS1 errors: missing periodical</a></li><li><a href="/wiki/Category:Use_dmy_dates_from_January_2022" title="Category:Use dmy dates from January 2022">Use dmy dates from January 2022</a></li><li><a href="/wiki/Category:Use_list-defined_references_from_January_2022" title="Category:Use list-defined references from January 2022">Use list-defined references from January 2022</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> This page was last edited on 18 November 2024, at 15:41<span class="anonymous-show"> (UTC)</span>.</li> <li id="footer-info-copyright">Text is available under the <a href="/wiki/Wikipedia:Text_of_the_Creative_Commons_Attribution-ShareAlike_4.0_International_License" title="Wikipedia:Text of the Creative Commons Attribution-ShareAlike 4.0 International License">Creative Commons Attribution-ShareAlike 4.0 License</a>; additional terms may apply. By using this site, you agree to the <a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Terms_of_Use" class="extiw" title="foundation:Special:MyLanguage/Policy:Terms of Use">Terms of Use</a> and <a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Privacy_policy" class="extiw" title="foundation:Special:MyLanguage/Policy:Privacy policy">Privacy Policy</a>. Wikipedia® is a registered trademark of the <a rel="nofollow" class="external text" href="https://wikimediafoundation.org/">Wikimedia Foundation, Inc.</a>, a non-profit organization.</li> </ul> <ul id="footer-places"> <li id="footer-places-privacy"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Privacy_policy">Privacy policy</a></li> <li id="footer-places-about"><a href="/wiki/Wikipedia:About">About Wikipedia</a></li> <li id="footer-places-disclaimers"><a href="/wiki/Wikipedia:General_disclaimer">Disclaimers</a></li> <li id="footer-places-contact"><a href="//en.wikipedia.org/wiki/Wikipedia:Contact_us">Contact Wikipedia</a></li> <li id="footer-places-wm-codeofconduct"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Universal_Code_of_Conduct">Code of Conduct</a></li> <li id="footer-places-developers"><a href="https://developer.wikimedia.org">Developers</a></li> <li id="footer-places-statslink"><a href="https://stats.wikimedia.org/#/en.wikipedia.org">Statistics</a></li> <li id="footer-places-cookiestatement"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Cookie_statement">Cookie statement</a></li> <li id="footer-places-mobileview"><a href="//en.m.wikipedia.org/w/index.php?title=Specctra&mobileaction=toggle_view_mobile" class="noprint stopMobileRedirectToggle">Mobile view</a></li> </ul> <ul id="footer-icons" class="noprint"> <li id="footer-copyrightico"><a href="https://wikimediafoundation.org/" class="cdx-button cdx-button--fake-button cdx-button--size-large cdx-button--fake-button--enabled"><img src="/static/images/footer/wikimedia-button.svg" width="84" height="29" alt="Wikimedia Foundation" lang="en" loading="lazy"></a></li> <li id="footer-poweredbyico"><a href="https://www.mediawiki.org/" class="cdx-button cdx-button--fake-button cdx-button--size-large cdx-button--fake-button--enabled"><picture><source media="(min-width: 500px)" srcset="/w/resources/assets/poweredby_mediawiki.svg" width="88" height="31"><img src="/w/resources/assets/mediawiki_compact.svg" alt="Powered by MediaWiki" width="25" height="25" loading="lazy"></picture></a></li> </ul> </footer> </div> </div> </div> <div class="vector-header-container vector-sticky-header-container"> <div id="vector-sticky-header" class="vector-sticky-header"> <div class="vector-sticky-header-start"> <div class="vector-sticky-header-icon-start vector-button-flush-left vector-button-flush-right" aria-hidden="true"> <button class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-sticky-header-search-toggle" tabindex="-1" data-event-name="ui.vector-sticky-search-form.icon"><span class="vector-icon mw-ui-icon-search mw-ui-icon-wikimedia-search"></span> <span>Search</span> </button> </div> <div role="search" class="vector-search-box-vue vector-search-box-show-thumbnail vector-search-box"> <div class="vector-typeahead-search-container"> <div class="cdx-typeahead-search cdx-typeahead-search--show-thumbnail"> <form action="/w/index.php" id="vector-sticky-search-form" class="cdx-search-input cdx-search-input--has-end-button"> <div class="cdx-search-input__input-wrapper" data-search-loc="header-moved"> <div class="cdx-text-input cdx-text-input--has-start-icon"> <input class="cdx-text-input__input" type="search" name="search" placeholder="Search Wikipedia"> <span class="cdx-text-input__icon cdx-text-input__start-icon"></span> </div> <input type="hidden" name="title" value="Special:Search"> </div> <button class="cdx-button cdx-search-input__end-button">Search</button> </form> </div> </div> </div> <div class="vector-sticky-header-context-bar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-sticky-header-toc" class="vector-dropdown mw-portlet mw-portlet-sticky-header-toc vector-sticky-header-toc vector-button-flush-left" > <input type="checkbox" id="vector-sticky-header-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-sticky-header-toc" class="vector-dropdown-checkbox " aria-label="Toggle the table of contents" > <label id="vector-sticky-header-toc-label" for="vector-sticky-header-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Toggle the table of contents</span> </label> <div class="vector-dropdown-content"> <div id="vector-sticky-header-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <div class="vector-sticky-header-context-bar-primary" aria-hidden="true" ><span class="mw-page-title-main">Specctra</span></div> </div> </div> <div class="vector-sticky-header-end" aria-hidden="true"> <div class="vector-sticky-header-icons"> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-talk-sticky-header" tabindex="-1" data-event-name="talk-sticky-header"><span class="vector-icon mw-ui-icon-speechBubbles mw-ui-icon-wikimedia-speechBubbles"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-subject-sticky-header" tabindex="-1" data-event-name="subject-sticky-header"><span class="vector-icon mw-ui-icon-article mw-ui-icon-wikimedia-article"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-history-sticky-header" tabindex="-1" data-event-name="history-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-history mw-ui-icon-wikimedia-wikimedia-history"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only mw-watchlink" id="ca-watchstar-sticky-header" tabindex="-1" data-event-name="watch-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-star mw-ui-icon-wikimedia-wikimedia-star"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-edit-sticky-header" tabindex="-1" data-event-name="wikitext-edit-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-wikiText mw-ui-icon-wikimedia-wikimedia-wikiText"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-ve-edit-sticky-header" tabindex="-1" data-event-name="ve-edit-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-edit mw-ui-icon-wikimedia-wikimedia-edit"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-viewsource-sticky-header" tabindex="-1" data-event-name="ve-edit-protected-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-editLock mw-ui-icon-wikimedia-wikimedia-editLock"></span> <span></span> </a> </div> <div class="vector-sticky-header-buttons"> <button class="cdx-button cdx-button--weight-quiet mw-interlanguage-selector" id="p-lang-btn-sticky-header" tabindex="-1" data-event-name="ui.dropdown-p-lang-btn-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-language mw-ui-icon-wikimedia-wikimedia-language"></span> <span>2 languages</span> </button> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive" id="ca-addsection-sticky-header" tabindex="-1" data-event-name="addsection-sticky-header"><span class="vector-icon mw-ui-icon-speechBubbleAdd-progressive mw-ui-icon-wikimedia-speechBubbleAdd-progressive"></span> <span>Add topic</span> </a> </div> <div class="vector-sticky-header-icon-end"> <div class="vector-user-links"> </div> </div> </div> </div> </div> <div class="vector-settings" id="p-dock-bottom"> <ul></ul> </div><script>(RLQ=window.RLQ||[]).push(function(){mw.config.set({"wgHostname":"mw-web.codfw.main-7dfdf5498-2tb2l","wgBackendResponseTime":124,"wgPageParseReport":{"limitreport":{"cputime":"0.436","walltime":"0.542","ppvisitednodes":{"value":1648,"limit":1000000},"postexpandincludesize":{"value":62963,"limit":2097152},"templateargumentsize":{"value":1622,"limit":2097152},"expansiondepth":{"value":18,"limit":100},"expensivefunctioncount":{"value":5,"limit":500},"unstrip-depth":{"value":1,"limit":20},"unstrip-size":{"value":64138,"limit":5000000},"entityaccesscount":{"value":1,"limit":400},"timingprofile":["100.00% 476.677 1 -total"," 45.81% 218.367 1 Template:Reflist"," 42.66% 203.345 16 Template:Cite_web"," 26.46% 126.116 2 Template:Infobox"," 19.16% 91.355 1 Template:Infobox_software"," 19.05% 90.813 3 Template:Navbox"," 19.02% 90.648 1 Template:CAD_software"," 10.33% 49.260 1 Template:Infobox_software/simple"," 8.13% 38.760 1 Template:Use_dmy_dates"," 3.60% 17.156 2 Template:DMCA"]},"scribunto":{"limitreport-timeusage":{"value":"0.280","limit":"10.000"},"limitreport-memusage":{"value":4345200,"limit":52428800}},"cachereport":{"origin":"mw-web.eqiad.next-7fcc864f7d-bn69x","timestamp":"20250206093852","ttl":2592000,"transientcontent":false}}});});</script> <script type="application/ld+json">{"@context":"https:\/\/schema.org","@type":"Article","name":"Specctra","url":"https:\/\/en.wikipedia.org\/wiki\/Specctra","sameAs":"http:\/\/www.wikidata.org\/entity\/Q4049875","mainEntity":"http:\/\/www.wikidata.org\/entity\/Q4049875","author":{"@type":"Organization","name":"Contributors to Wikimedia projects"},"publisher":{"@type":"Organization","name":"Wikimedia Foundation, Inc.","logo":{"@type":"ImageObject","url":"https:\/\/www.wikimedia.org\/static\/images\/wmf-hor-googpub.png"}},"datePublished":"2018-10-19T09:29:40Z","dateModified":"2024-11-18T15:41:28Z"}</script> </body> </html>