High Voltage Amplifier | Forum for Electronics

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It may not display this or other websites correctly.<br />You should upgrade or use an <a href="https://www.google.com/chrome/" target="_blank" rel="noopener">alternative browser</a>.</div> <div class="p-body-header"> <div class="p-title "> <h1 class="p-title-value">High Voltage Amplifier</h1> </div> <div class="p-description"> <ul class="listInline listInline--bullet"> <li> <i class="fa--xf fal fa-user" aria-hidden="true" title="Thread starter"></i> <span class="u-srOnly">Thread starter</span> <a href="/members/tek-no-logical.12903/" class="username u-concealed" dir="auto" data-user-id="12903" data-xf-init="member-tooltip">tek-no-logical</a> </li> <li> <i class="fa--xf fal fa-clock" aria-hidden="true" title="Start date"></i> <span class="u-srOnly">Start date</span> <a href="/threads/high-voltage-amplifier.14110/" class="u-concealed"><time class="u-dt" dir="auto" datetime="2004-01-12T01:03:33+0000" data-time="1073869413" data-date-string="Jan 12, 2004" data-time-string="1:03 AM" title="Jan 12, 2004 at 1:03 AM">Jan 12, 2004</time></a> </li> </ul> </div> </div> <div class="p-body-main p-body-main--withSidebar "> <div class="p-body-contentCol"></div> <div class="p-body-sidebarCol"></div> <div class="p-body-content">  <div id='div-gpt-eda_wallpaper'> <script> googletag.cmd.push(function() { googletag.display('div-gpt-eda_wallpaper'); }); </script> </div> <div class="p-body-pageContent"> <div class="block block--messages" data-xf-init="" data-type="post" data-href="/inline-mod/" data-search-target="*"> <span class="u-anchorTarget" id="posts"></span> <div class="block-outer"> <dl class="blockStatus"> <dt>Status</dt> <dd class="blockStatus-message blockStatus-message--locked"> Not open for further replies. </dd> </dl> </div> <div class="block-outer"></div> <div class="block-outer js-threadStatusField"></div> <div class="block-container lbContainer" data-xf-init="lightbox select-to-quote" data-message-selector=".js-post" data-lb-id="thread-14110" data-lb-universal="0"> <div class="block-body js-replyNewMessageContainer"> <article class="message message--post js-post js-inlineModContainer " data-author="tek-no-logical" data-content="post-57239" id="js-post-57239" > <span class="u-anchorTarget" id="post-57239"></span> <div class="message-header"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <a href="/threads/high-voltage-amplifier.14110/post-57239" rel="nofollow" > <time class="u-dt" dir="auto" datetime="2004-01-12T01:03:33+0000" data-time="1073869413" data-date-string="Jan 12, 2004" data-time-string="1:03 AM" title="Jan 12, 2004 at 1:03 AM">Jan 12, 2004</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/threads/high-voltage-amplifier.14110/post-57239" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/posts/57239/share" aria-label="Share" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </a> </li> <li> <a href="/threads/high-voltage-amplifier.14110/post-57239" rel="nofollow"> #1 </a> </li> </ul> </header> </div> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" > <div class="message-avatar "> <div class="message-avatar-wrapper"> <a href="/members/tek-no-logical.12903/" class="avatar avatar--m avatar--default avatar--default--dynamic" data-user-id="12903" data-xf-init="member-tooltip" style="background-color: #ebadcc; color: #b82e73"> <span class="avatar-u12903-m" role="img" aria-label="tek-no-logical">T</span> </a> </div> </div> <div class="message-userDetails"> <h4 class="message-name"><a href="/members/tek-no-logical.12903/" class="username " dir="auto" data-user-id="12903" data-xf-init="member-tooltip">tek-no-logical</a></h4> <h5 class="userTitle message-userTitle" dir="auto">Newbie level 3</h5> </div> <img src="/styles/images/ranks/alevel3.gif" alt="Newbie level 3"> <div class="message-userExtras"> <dl class="pairs pairs--justified joinedBlock"> <dt>Joined</dt> <dd>Jan 7, 2004</dd> </dl> <dl class="pairs pairs--justified pairs--xbBoxed"> <dt>Messages</dt> <dd>4</dd> </dl> <dl class="pairs pairs--justified"> <dt> Helped</dt> <dd>0</dd> </dl> <dl class="pairs pairs--justified"> <dt>Reputation </dt> <dd> <a href="/reputation/authors/tek-no-logical.12903" class="fauxBlockLink-linkRow u-concealed">0</a> </dd> </dl> <dl class="pairs pairs--justified"> <dt>Reaction score</dt> <dd>0</dd> </dl> <dl class="pairs pairs--justified pairs--xbBoxed trophyBlock"> <dt>Trophy points</dt> <dd>1,281</dd> </dl> <dl class="pairs pairs--justified creditBlock"> <dt title="Activity points">Activity points</dt> <dd> <a href="/activity/" data-xf-click="overlay" class="fauxBlockLink-blockLink u-concealed"> 43 </a> </dd> </dl> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-57239" data-lb-caption-desc="tek-no-logical · Jan 12, 2004 at 1:03 AM"> <article class="message-body js-selectToQuote"> <div > <div class="bbWrapper"><b>high voltage amplifier</b><br /> <br /> Hello.<br /> I need to build some strange amplifier:<br /> input range +-10V<br /> output +- 3kV<br /> BW DC..few kHz<br /> Its output should be able to sink/source current approx. of few mA.<br /> Can anyone give me some directions on output stage?<br /> Or maybe some useful links?<br /> <br /> Thank you for reply.</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> </div> <footer class="message-footer"> <div class="reactionsBar js-reactionsList "> </div> <br/> <div class="js-historyTarget message-historyTarget toggleTarget" data-href="trigger-href"></div> </footer> </div> </div> </div> </article> <article class="message message--post js-post js-inlineModContainer " data-author="sutapanaki" data-content="post-57380" id="js-post-57380" itemscope itemtype="https://schema.org/Comment" itemid="https://www.edaboard.com/posts/57380/"> <meta itemprop="parentItem" itemscope itemid="https://www.edaboard.com/threads/high-voltage-amplifier.14110/" /> <span class="u-anchorTarget" id="post-57380"></span> <div class="message-header"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <a href="/threads/high-voltage-amplifier.14110/post-57380" rel="nofollow" itemprop="url"> <time class="u-dt" dir="auto" datetime="2004-01-12T19:22:12+0000" data-time="1073935332" data-date-string="Jan 12, 2004" data-time-string="7:22 PM" title="Jan 12, 2004 at 7:22 PM" itemprop="datePublished">Jan 12, 2004</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/threads/high-voltage-amplifier.14110/post-57380" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/posts/57380/share" aria-label="Share" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </a> </li> <li> <a href="/threads/high-voltage-amplifier.14110/post-57380" rel="nofollow"> #2 </a> </li> </ul> </header> </div> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" itemprop="author" itemscope itemtype="https://schema.org/Person" itemid="https://www.edaboard.com/members/sutapanaki.1196/"> <meta itemprop="url" content="https://www.edaboard.com/members/sutapanaki.1196/" /> <div class="message-avatar "> <div class="message-avatar-wrapper"> <a href="/members/sutapanaki.1196/" class="avatar avatar--m avatar--default avatar--default--dynamic" data-user-id="1196" data-xf-init="member-tooltip" style="background-color: #3b2b2b; color: #9d7b7b"> <span class="avatar-u1196-m" role="img" aria-label="sutapanaki">S</span> </a> </div> </div> <div class="message-userDetails"> <h4 class="message-name"><a href="/members/sutapanaki.1196/" class="username " dir="auto" data-user-id="1196" data-xf-init="member-tooltip"><span itemprop="name">sutapanaki</span></a></h4> <h5 class="userTitle message-userTitle" dir="auto" itemprop="jobTitle">Advanced Member level 4</h5> </div> <img src="/styles/images/ranks/hlevel1.gif" alt="Advanced Member level 4"> <div class="message-userExtras"> <dl class="pairs pairs--justified joinedBlock"> <dt>Joined</dt> <dd>Nov 2, 2001</dd> </dl> <dl class="pairs pairs--justified pairs--xbBoxed"> <dt>Messages</dt> <dd>1,346</dd> </dl> <dl class="pairs pairs--justified"> <dt> Helped</dt> <dd>524</dd> </dl> <dl class="pairs pairs--justified"> <dt>Reputation </dt> <dd> <a href="/reputation/authors/sutapanaki.1196" class="fauxBlockLink-linkRow u-concealed">1,050</a> </dd> </dl> <dl class="pairs pairs--justified"> <dt>Reaction score</dt> <dd>489</dd> </dl> <dl class="pairs pairs--justified pairs--xbBoxed trophyBlock"> <dt>Trophy points</dt> <dd>1,363</dd> </dl> <dl class="pairs pairs--justified locationBlock"> <dt>Location</dt> <dd> <a href="/misc/location-info?location=US" rel="nofollow noreferrer" target="_blank" class="u-concealed">US</a> </dd> </dl> <dl class="pairs pairs--justified creditBlock"> <dt title="Activity points">Activity points</dt> <dd> <a href="/activity/" data-xf-click="overlay" class="fauxBlockLink-blockLink u-concealed"> 11,154 </a> </dd> </dl> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-57380" data-lb-caption-desc="sutapanaki · Jan 12, 2004 at 7:22 PM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper"><b>high voltage amplifier schematics</b><br /> <br /> what is the supply for this beast? Not sure if transistors can handle this voltage, even if you stack them. May be use vacuum tubes.</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta itemprop="userInteractionCount" content="0" /> <meta itemprop="interactionType" content="https://schema.org/LikeAction" /> </div> <div class="reactionsBar js-reactionsList "> </div> <br/> <div class="js-historyTarget message-historyTarget toggleTarget" data-href="trigger-href"></div> </footer> </div> </div> </div> </article> <article class="message message--post js-post js-inlineModContainer " data-author="flatulent" data-content="post-57382" id="js-post-57382" itemscope itemtype="https://schema.org/Comment" itemid="https://www.edaboard.com/posts/57382/"> <meta itemprop="parentItem" itemscope itemid="https://www.edaboard.com/threads/high-voltage-amplifier.14110/" /> <span class="u-anchorTarget" id="post-57382"></span> <div class="message-header"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <a href="/threads/high-voltage-amplifier.14110/post-57382" rel="nofollow" itemprop="url"> <time class="u-dt" dir="auto" datetime="2004-01-12T19:46:30+0000" data-time="1073936790" data-date-string="Jan 12, 2004" data-time-string="7:46 PM" title="Jan 12, 2004 at 7:46 PM" itemprop="datePublished">Jan 12, 2004</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/threads/high-voltage-amplifier.14110/post-57382" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/posts/57382/share" aria-label="Share" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </a> </li> <li> <a href="/threads/high-voltage-amplifier.14110/post-57382" rel="nofollow"> #3 </a> </li> </ul> </header> </div> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" itemprop="author" itemscope itemtype="https://schema.org/Person" itemid="https://www.edaboard.com/members/flatulent.3599/"> <meta itemprop="url" content="https://www.edaboard.com/members/flatulent.3599/" /> <div class="message-avatar "> <div class="message-avatar-wrapper"> <a href="/members/flatulent.3599/" class="avatar avatar--m" data-user-id="3599" data-xf-init="member-tooltip"> <img src="/data/avatars/m/3/3599.jpg?1591248332" alt="flatulent" class="avatar-u3599-m" width="96" height="96" loading="lazy" itemprop="image" /> </a> </div> </div> <div class="message-userDetails"> <h4 class="message-name"><a href="/members/flatulent.3599/" class="username " dir="auto" data-user-id="3599" data-xf-init="member-tooltip"><span itemprop="name">flatulent</span></a></h4> <h5 class="userTitle message-userTitle" dir="auto" itemprop="jobTitle">Advanced Member level 6</h5> </div> <img src="/styles/images/ranks/hlevel3.gif" alt="Advanced Member level 6"> <div class="message-userExtras"> <dl class="pairs pairs--justified joinedBlock"> <dt>Joined</dt> <dd>Jul 19, 2002</dd> </dl> <dl class="pairs pairs--justified pairs--xbBoxed"> <dt>Messages</dt> <dd>4,624</dd> </dl> <dl class="pairs pairs--justified"> <dt> Helped</dt> <dd>489</dd> </dl> <dl class="pairs pairs--justified"> <dt>Reputation </dt> <dd> <a href="/reputation/authors/flatulent.3599" class="fauxBlockLink-linkRow u-concealed">980</a> </dd> </dl> <dl class="pairs pairs--justified"> <dt>Reaction score</dt> <dd>151</dd> </dl> <dl class="pairs pairs--justified pairs--xbBoxed trophyBlock"> <dt>Trophy points</dt> <dd>1,343</dd> </dl> <dl class="pairs pairs--justified locationBlock"> <dt>Location</dt> <dd> <a href="/misc/location-info?location=Middle+Earth" rel="nofollow noreferrer" target="_blank" class="u-concealed">Middle Earth</a> </dd> </dl> <dl class="pairs pairs--justified creditBlock"> <dt title="Activity points">Activity points</dt> <dd> <a href="/activity/" data-xf-click="overlay" class="fauxBlockLink-blockLink u-concealed"> 46,689 </a> </dd> </dl> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-57382" data-lb-caption-desc="flatulent · Jan 12, 2004 at 7:46 PM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper">You will have to use transistors rated at 7 kV. One method is to use two current mirrors facing each other across the output connection. One from the + supply and one from the - supply. These mirrors are driven from variable current sources referenced to ground. This makes their input voltage range within the +-15V output capability of op amps. Then sense the output voltage through a resistor (that is rated at 7 kV) and use an inverting op amp circuit with the inputs diode clamped to the +-15V supply to protect the op amp.</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta itemprop="userInteractionCount" content="0" /> <meta itemprop="interactionType" content="https://schema.org/LikeAction" /> </div> <div class="reactionsBar js-reactionsList "> </div> <br/> <div class="js-historyTarget message-historyTarget toggleTarget" data-href="trigger-href"></div> </footer> </div> </div> </div> </article> <article class="message message--post js-post js-inlineModContainer " data-author="tek-no-logical" data-content="post-57395" id="js-post-57395" itemscope itemtype="https://schema.org/Comment" itemid="https://www.edaboard.com/posts/57395/"> <meta itemprop="parentItem" itemscope itemid="https://www.edaboard.com/threads/high-voltage-amplifier.14110/" /> <span class="u-anchorTarget" id="post-57395"></span> <div class="message-header"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <a href="/threads/high-voltage-amplifier.14110/post-57395" rel="nofollow" itemprop="url"> <time class="u-dt" dir="auto" datetime="2004-01-12T23:58:43+0000" data-time="1073951923" data-date-string="Jan 12, 2004" data-time-string="11:58 PM" title="Jan 12, 2004 at 11:58 PM" itemprop="datePublished">Jan 12, 2004</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/threads/high-voltage-amplifier.14110/post-57395" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/posts/57395/share" aria-label="Share" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </a> </li> <li> <a href="/threads/high-voltage-amplifier.14110/post-57395" rel="nofollow"> #4 </a> </li> </ul> </header> </div> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" itemprop="author" itemscope itemtype="https://schema.org/Person" itemid="https://www.edaboard.com/members/tek-no-logical.12903/"> <meta itemprop="url" content="https://www.edaboard.com/members/tek-no-logical.12903/" /> <div class="message-avatar "> <div class="message-avatar-wrapper"> <a href="/members/tek-no-logical.12903/" class="avatar avatar--m avatar--default avatar--default--dynamic" data-user-id="12903" data-xf-init="member-tooltip" style="background-color: #ebadcc; color: #b82e73"> <span class="avatar-u12903-m" role="img" aria-label="tek-no-logical">T</span> </a> </div> </div> <div class="message-userDetails"> <h4 class="message-name"><a href="/members/tek-no-logical.12903/" class="username " dir="auto" data-user-id="12903" data-xf-init="member-tooltip"><span itemprop="name">tek-no-logical</span></a></h4> <h5 class="userTitle message-userTitle" dir="auto" itemprop="jobTitle">Newbie level 3</h5> </div> <img src="/styles/images/ranks/alevel3.gif" alt="Newbie level 3"> <div class="message-userExtras"> <dl class="pairs pairs--justified joinedBlock"> <dt>Joined</dt> <dd>Jan 7, 2004</dd> </dl> <dl class="pairs pairs--justified pairs--xbBoxed"> <dt>Messages</dt> <dd>4</dd> </dl> <dl class="pairs pairs--justified"> <dt> Helped</dt> <dd>0</dd> </dl> <dl class="pairs pairs--justified"> <dt>Reputation </dt> <dd> <a href="/reputation/authors/tek-no-logical.12903" class="fauxBlockLink-linkRow u-concealed">0</a> </dd> </dl> <dl class="pairs pairs--justified"> <dt>Reaction score</dt> <dd>0</dd> </dl> <dl class="pairs pairs--justified pairs--xbBoxed trophyBlock"> <dt>Trophy points</dt> <dd>1,281</dd> </dl> <dl class="pairs pairs--justified creditBlock"> <dt title="Activity points">Activity points</dt> <dd> <a href="/activity/" data-xf-click="overlay" class="fauxBlockLink-blockLink u-concealed"> 43 </a> </dd> </dl> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-57395" data-lb-caption-desc="tek-no-logical · Jan 12, 2004 at 11:58 PM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper">Thank you.<br /> <blockquote data-attributes="" data-quote="sutapanaki" data-source="" class="bbCodeBlock bbCodeBlock--expandable bbCodeBlock--quote js-expandWatch"> <div class="bbCodeBlock-title"> sutapanaki said: </div> <div class="bbCodeBlock-content"> <div class="bbCodeBlock-expandContent js-expandContent "> what is the supply for this beast? </div> <div class="bbCodeBlock-expandLink js-expandLink"><a role="button" tabindex="0">Click to expand...</a></div> </div> </blockquote>Supply is not a problem, I'll use some multiplier or HF DC/DC transformer.<br /> <blockquote data-attributes="" data-quote="sutapanaki" data-source="" class="bbCodeBlock bbCodeBlock--expandable bbCodeBlock--quote js-expandWatch"> <div class="bbCodeBlock-title"> sutapanaki said: </div> <div class="bbCodeBlock-content"> <div class="bbCodeBlock-expandContent js-expandContent "> Not sure if transistors can handle this voltage, even if you stack them. May be use vacuum tubes. </div> <div class="bbCodeBlock-expandLink js-expandLink"><a role="button" tabindex="0">Click to expand...</a></div> </div> </blockquote>I was looking for HV transistors, and easy available are max. about 1000V.<br /> With RF power tubes it probably can be done, but I can't use tubes<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3" alt=":(" title="Frown :(" loading="lazy" data-shortname=":(" /><br /> <blockquote data-attributes="" data-quote="flatulent" data-source="" class="bbCodeBlock bbCodeBlock--expandable bbCodeBlock--quote js-expandWatch"> <div class="bbCodeBlock-title"> flatulent said: </div> <div class="bbCodeBlock-content"> <div class="bbCodeBlock-expandContent js-expandContent "> You will have to use transistors rated at 7 kV </div> <div class="bbCodeBlock-expandLink js-expandLink"><a role="button" tabindex="0">Click to expand...</a></div> </div> </blockquote>I'd love to use them, but were to find it?<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /><br /> <blockquote data-attributes="" data-quote="flatulent" data-source="" class="bbCodeBlock bbCodeBlock--expandable bbCodeBlock--quote js-expandWatch"> <div class="bbCodeBlock-title"> flatulent said: </div> <div class="bbCodeBlock-content"> <div class="bbCodeBlock-expandContent js-expandContent "> One method is to use two current mirrors facing each other across the output connection. One from the + supply and one from the - supply. These mirrors are driven from variable current sources referenced to ground. This makes their input voltage range within the +-15V output capability of op amps. Then sense the output voltage through a resistor (that is rated at 7 kV) and use an inverting op amp circuit with the inputs diode clamped to the +-15V supply to protect the op amp. </div> <div class="bbCodeBlock-expandLink js-expandLink"><a role="button" tabindex="0">Click to expand...</a></div> </div> </blockquote> Thank you very much.<br /> How about serial connected transistors rated for 1KV ( they are easy available ). Probably there will be a problem with 'dynamic voltage dividing' ( transistors will have slightly different parameters )<br /> And one more question:<br /> -is it ok to make supply ( DC/DC converter running at say about 1 MHz) which is tracking input signal, to provide dynamic supply (+-)?</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta itemprop="userInteractionCount" content="0" /> <meta itemprop="interactionType" content="https://schema.org/LikeAction" /> </div> <div class="reactionsBar js-reactionsList "> </div> <br/> <div class="js-historyTarget message-historyTarget toggleTarget" data-href="trigger-href"></div> </footer> </div> </div> </div> </article> <article class="message message--post js-post js-inlineModContainer " data-author="flatulent" data-content="post-57402" id="js-post-57402" itemscope itemtype="https://schema.org/Comment" itemid="https://www.edaboard.com/posts/57402/"> <meta itemprop="parentItem" itemscope itemid="https://www.edaboard.com/threads/high-voltage-amplifier.14110/" /> <span class="u-anchorTarget" id="post-57402"></span> <div class="message-header"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <a href="/threads/high-voltage-amplifier.14110/post-57402" rel="nofollow" itemprop="url"> <time class="u-dt" dir="auto" datetime="2004-01-13T01:39:31+0000" data-time="1073957971" data-date-string="Jan 13, 2004" data-time-string="1:39 AM" title="Jan 13, 2004 at 1:39 AM" itemprop="datePublished">Jan 13, 2004</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/threads/high-voltage-amplifier.14110/post-57402" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/posts/57402/share" 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data-user-id="3599" data-xf-init="member-tooltip"><span itemprop="name">flatulent</span></a></h4> <h5 class="userTitle message-userTitle" dir="auto" itemprop="jobTitle">Advanced Member level 6</h5> </div> <img src="/styles/images/ranks/hlevel3.gif" alt="Advanced Member level 6"> <div class="message-userExtras"> <dl class="pairs pairs--justified joinedBlock"> <dt>Joined</dt> <dd>Jul 19, 2002</dd> </dl> <dl class="pairs pairs--justified pairs--xbBoxed"> <dt>Messages</dt> <dd>4,624</dd> </dl> <dl class="pairs pairs--justified"> <dt> Helped</dt> <dd>489</dd> </dl> <dl class="pairs pairs--justified"> <dt>Reputation </dt> <dd> <a href="/reputation/authors/flatulent.3599" class="fauxBlockLink-linkRow u-concealed">980</a> </dd> </dl> <dl class="pairs pairs--justified"> <dt>Reaction score</dt> <dd>151</dd> </dl> <dl class="pairs pairs--justified pairs--xbBoxed trophyBlock"> <dt>Trophy points</dt> <dd>1,343</dd> </dl> <dl class="pairs pairs--justified locationBlock"> <dt>Location</dt> <dd> <a href="/misc/location-info?location=Middle+Earth" rel="nofollow noreferrer" target="_blank" class="u-concealed">Middle Earth</a> </dd> </dl> <dl class="pairs pairs--justified creditBlock"> <dt title="Activity points">Activity points</dt> <dd> <a href="/activity/" data-xf-click="overlay" class="fauxBlockLink-blockLink u-concealed"> 46,689 </a> </dd> </dl> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-57402" data-lb-caption-desc="flatulent · Jan 13, 2004 at 1:39 AM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper">It is possible to stack up the transistors and equalize their Vce by using the classical method of putting their bases to taps on a voltage divider. <br /> <br /> This method goes back to the early days of transistor power audio amplifiers.</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta itemprop="userInteractionCount" content="0" /> <meta itemprop="interactionType" content="https://schema.org/LikeAction" /> </div> <div class="reactionsBar js-reactionsList "> </div> <br/> <div class="js-historyTarget message-historyTarget toggleTarget" data-href="trigger-href"></div> </footer> </div> </div> </div> </article> <article class="message message--post js-post js-inlineModContainer " data-author="tek-no-logical" data-content="post-57403" id="js-post-57403" itemscope itemtype="https://schema.org/Comment" itemid="https://www.edaboard.com/posts/57403/"> <meta itemprop="parentItem" itemscope itemid="https://www.edaboard.com/threads/high-voltage-amplifier.14110/" /> <span class="u-anchorTarget" 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class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-57403" data-lb-caption-desc="tek-no-logical · Jan 13, 2004 at 1:42 AM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper">Thanks again<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /><br /> Can you, please, point me to some sites?</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta itemprop="userInteractionCount" content="0" /> <meta 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data-time="1073963735" data-date-string="Jan 13, 2004" data-time-string="3:15 AM" title="Jan 13, 2004 at 3:15 AM" itemprop="datePublished">Jan 13, 2004</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/threads/high-voltage-amplifier.14110/post-57414" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/posts/57414/share" aria-label="Share" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </a> </li> <li> <a href="/threads/high-voltage-amplifier.14110/post-57414" rel="nofollow"> #7 </a> </li> </ul> </header> </div> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" itemprop="author" itemscope itemtype="https://schema.org/Person" itemid="https://www.edaboard.com/members/flatulent.3599/"> <meta itemprop="url" content="https://www.edaboard.com/members/flatulent.3599/" /> <div class="message-avatar "> <div 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<dl class="pairs pairs--justified"> <dt>Reputation </dt> <dd> <a href="/reputation/authors/flatulent.3599" class="fauxBlockLink-linkRow u-concealed">980</a> </dd> </dl> <dl class="pairs pairs--justified"> <dt>Reaction score</dt> <dd>151</dd> </dl> <dl class="pairs pairs--justified pairs--xbBoxed trophyBlock"> <dt>Trophy points</dt> <dd>1,343</dd> </dl> <dl class="pairs pairs--justified locationBlock"> <dt>Location</dt> <dd> <a href="/misc/location-info?location=Middle+Earth" rel="nofollow noreferrer" target="_blank" class="u-concealed">Middle Earth</a> </dd> </dl> <dl class="pairs pairs--justified creditBlock"> <dt title="Activity points">Activity points</dt> <dd> <a href="/activity/" data-xf-click="overlay" class="fauxBlockLink-blockLink u-concealed"> 46,689 </a> </dd> </dl> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-57414" data-lb-caption-desc="flatulent · Jan 13, 2004 at 3:15 AM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper">After saying all of the above, there are some serious safety and legal issues to face. Parts have to be special high voltage rated and the construction practices have some restrictions. If you are not supervised by someone with high voltage experience you should not risk the safety of your self and your customers. Not getting the income from the job is well worth the absence of killing yourself or your customer with the resulting legal actions. <br /> <br /> One further thing is that the feedback resistor should be a divider reducing the 7 kV to 15 V so that there is absolutely no danger of damaging the op amp. You will have to use special test probes as well. <br /> <br /> **broken link removed**<br /> also try zetex and supertex companies. Zetex makes 500 V bipolars and supertex makes 500 V MOS.<br /> <br /> You might try talking with people in the physics department at a near by university for device suggestions.</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta itemprop="userInteractionCount" content="0" /> <meta itemprop="interactionType" content="https://schema.org/LikeAction" /> </div> <div class="reactionsBar js-reactionsList "> </div> <br/> <div class="js-historyTarget message-historyTarget toggleTarget" data-href="trigger-href"></div> </footer> </div> </div> </div> </article> <article class="message message--post js-post js-inlineModContainer " data-author="tek-no-logical" data-content="post-57863" id="js-post-57863" itemscope itemtype="https://schema.org/Comment" itemid="https://www.edaboard.com/posts/57863/"> <meta 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</li> <li> <a href="/threads/high-voltage-amplifier.14110/post-57863" rel="nofollow"> #8 </a> </li> </ul> </header> </div> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" itemprop="author" itemscope itemtype="https://schema.org/Person" itemid="https://www.edaboard.com/members/tek-no-logical.12903/"> <meta itemprop="url" content="https://www.edaboard.com/members/tek-no-logical.12903/" /> <div class="message-avatar "> <div class="message-avatar-wrapper"> <a href="/members/tek-no-logical.12903/" class="avatar avatar--m avatar--default avatar--default--dynamic" data-user-id="12903" data-xf-init="member-tooltip" style="background-color: #ebadcc; color: #b82e73"> <span class="avatar-u12903-m" role="img" aria-label="tek-no-logical">T</span> </a> </div> </div> <div class="message-userDetails"> <h4 class="message-name"><a href="/members/tek-no-logical.12903/" class="username " dir="auto" data-user-id="12903" data-xf-init="member-tooltip"><span itemprop="name">tek-no-logical</span></a></h4> <h5 class="userTitle message-userTitle" dir="auto" itemprop="jobTitle">Newbie level 3</h5> </div> <img src="/styles/images/ranks/alevel3.gif" alt="Newbie level 3"> <div class="message-userExtras"> <dl class="pairs pairs--justified joinedBlock"> <dt>Joined</dt> <dd>Jan 7, 2004</dd> </dl> <dl class="pairs pairs--justified pairs--xbBoxed"> <dt>Messages</dt> <dd>4</dd> </dl> <dl class="pairs pairs--justified"> <dt> Helped</dt> <dd>0</dd> </dl> <dl class="pairs pairs--justified"> <dt>Reputation </dt> <dd> <a href="/reputation/authors/tek-no-logical.12903" class="fauxBlockLink-linkRow u-concealed">0</a> </dd> </dl> <dl class="pairs pairs--justified"> <dt>Reaction score</dt> <dd>0</dd> </dl> <dl class="pairs pairs--justified pairs--xbBoxed trophyBlock"> <dt>Trophy points</dt> <dd>1,281</dd> </dl> <dl class="pairs pairs--justified creditBlock"> <dt title="Activity points">Activity points</dt> <dd> <a 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class="bbCodeBlock-expandLink js-expandLink"><a role="button" tabindex="0">Click to expand...</a></div> </div> </blockquote>I promis not kill anyone using this amp<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /><br /> <br /> Thanks again.<br /> <br /> Anyone have some more suggestions...?</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta itemprop="userInteractionCount" content="0" /> <meta itemprop="interactionType" content="https://schema.org/LikeAction" /> </div> <div class="reactionsBar js-reactionsList "> </div> <br/> <div class="js-historyTarget message-historyTarget toggleTarget" data-href="trigger-href"></div> </footer> </div> </div> </div> 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Are you sure you want to submit this form?", attach: "Attach files", rich_text_box: "Rich text box", close: "Close", link_copied_to_clipboard: "Link copied to clipboard.", text_copied_to_clipboard: "Text copied to clipboard.", loading: "Loading…", you_have_exceeded_maximum_number_of_selectable_items: "You have exceeded the maximum number of selectable items.", processing: "Processing", 'processing...': "Processing…", showing_x_of_y_items: "Showing {count} of {total} items", showing_all_items: "Showing all items", no_items_to_display: "No items to display", number_button_up: "Increase", number_button_down: "Decrease", push_enable_notification_title: "Push notifications enabled successfully at Forum for Electronics", push_enable_notification_body: "Thank you for enabling push notifications!", pull_down_to_refresh: "Pull down to refresh", release_to_refresh: "Release to refresh", refreshing: "Refreshing…" , "svStandardLib_time.day": "{count} day", "svStandardLib_time.days": "{count} days", "svStandardLib_time.hour": "{count} hour", "svStandardLib_time.hours": "{count} hours", "svStandardLib_time.minute": "{count} minutes", "svStandardLib_time.minutes": "{count} minutes", "svStandardLib_time.month": "{count} month", "svStandardLib_time.months": "{count} months", "svStandardLib_time.second": "{count} second", "svStandardLib_time.seconds": "{count} seconds", "svStandardLib_time.week": "time.week", "svStandardLib_time.weeks": "{count} weeks", "svStandardLib_time.year": "{count} year", "svStandardLib_time.years": "{count} years" }); </script> <form style="display:none" hidden="hidden"> <input type="text" name="_xfClientLoadTime" value="" id="_xfClientLoadTime" title="_xfClientLoadTime" tabindex="-1" /> </form>  <script type="application/ld+json"> { "@context": "https://schema.org", "@type": "WebPage", "url": "https://www.edaboard.com/threads/high-voltage-amplifier.14110/", "mainEntity": { "@type": "DiscussionForumPosting", "@id": "https://www.edaboard.com/threads/high-voltage-amplifier.14110/", "headline": "High Voltage Amplifier", "datePublished": "2004-01-12T01:03:33+00:00", "url": "https://www.edaboard.com/threads/high-voltage-amplifier.14110/", "articleSection": "Analog Circuit Design", "author": { "@type": "Person", "@id": "https://www.edaboard.com/members/tek-no-logical.12903/", "name": "tek-no-logical", "url": "https://www.edaboard.com/members/tek-no-logical.12903/" }, "interactionStatistic": [ { "@type": "InteractionCounter", "interactionType": "https://schema.org/ViewAction", "userInteractionCount": 6673 }, { "@type": "InteractionCounter", "interactionType": "https://schema.org/CommentAction", "userInteractionCount": 7 }, { "@type": "InteractionCounter", "interactionType": "https://schema.org/LikeAction", "userInteractionCount": 0 } ], "articleBody": "high voltage amplifier\n\nHello.\nI need to build some strange amplifier:\ninput range +-10V\noutput +- 3kV\nBW DC..few kHz\nIts output should be able to sink/source current approx. of few mA.\nCan anyone give me some directions on output stage?\nOr maybe some useful links?\n\nThank you for reply." }, "publisher": { "@type": "Organization", "name": "Forum for Electronics", "description": "International Electronics Discussion Forum: EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals", "url": "https://www.edaboard.com" } } </script> <script> $(function(){ var notice = $('.xb-welcome-notice'); if(notice.length){ var cookie = XF.Cookie.get('hide_welcome_notice'); if(!cookie){ XF.Cookie.set('hide_welcome_notice', Date.now()); notice.show(); } else if ((Date.now() - cookie) > 8.64e+7){ XF.Cookie.set('hide_welcome_notice', Date.now()); notice.show(); } else { notice.hide(); } } }); </script> </div> </body> </html>

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