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Search results for: M. Loulou
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Loulou</title> <meta name="description" content="Search results for: M. Loulou"> <meta name="keywords" content="M. Loulou"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block d-lg-none navbar-toggler ml-auto" type="button" data-toggle="collapse" data-target="#navbarMenu" aria-controls="navbarMenu" aria-expanded="false" aria-label="Toggle navigation"> <span class="navbar-toggler-icon"></span> </button> <div class="w-100"> <div class="d-none d-lg-flex flex-row-reverse"> <form method="get" action="https://waset.org/search" class="form-inline my-2 my-lg-0"> <input class="form-control mr-sm-2" type="search" placeholder="Search Conferences" value="M. 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Loulou"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 5</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: M. Loulou</h1> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5</span> Design of Folded Cascode OTA in Different Regions of Operation through gm/ID Methodology</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=H.%20Daoud%20Dammak">H. Daoud Dammak</a>, <a href="https://publications.waset.org/search?q=S.%20Bensalem"> S. Bensalem</a>, <a href="https://publications.waset.org/search?q=S.%20Zouari"> S. Zouari</a>, <a href="https://publications.waset.org/search?q=M.%20Loulou"> M. Loulou</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents an optimized methodology to folded cascode operational transconductance amplifier (OTA) design. The design is done in different regions of operation, weak inversion, strong inversion and moderate inversion using the gm/ID methodology in order to optimize MOS transistor sizing. Using 0.35渭m CMOS process, the designed folded cascode OTA achieves a DC gain of 77.5dB and a unity-gain frequency of 430MHz in strong inversion mode. In moderate inversion mode, it has a 92dB DC gain and provides a gain bandwidth product of around 69MHz. The OTA circuit has a DC gain of 75.5dB and unity-gain frequency limited to 19.14MHZ in weak inversion region. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=CMOS%20IC%20design" title="CMOS IC design">CMOS IC design</a>, <a href="https://publications.waset.org/search?q=Folded%20Cascode%20OTA" title=" Folded Cascode OTA"> Folded Cascode OTA</a>, <a href="https://publications.waset.org/search?q=gm%2FID%0Amethodology" title=" gm/ID methodology"> gm/ID methodology</a>, <a href="https://publications.waset.org/search?q=optimization." title=" optimization."> optimization.</a> </p> <a href="https://publications.waset.org/7027/design-of-folded-cascode-ota-in-different-regions-of-operation-through-gmid-methodology" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/7027/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/7027/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/7027/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/7027/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/7027/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/7027/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/7027/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/7027/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/7027/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/7027/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/7027.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">11726</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4</span> High Level Characterization and Optimization of Switched-Current Sigma-Delta Modulators with VHDL-AMS</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=A.%20Fakhfakh">A. Fakhfakh</a>, <a href="https://publications.waset.org/search?q=N.%20Ksentini"> N. Ksentini</a>, <a href="https://publications.waset.org/search?q=M.%20Loulou"> M. Loulou</a>, <a href="https://publications.waset.org/search?q=N.%20Masmoudi"> N. Masmoudi</a>, <a href="https://publications.waset.org/search?q=J.%20J.%20Charlot"> J. J. Charlot</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Today, design requirements are extending more and more from electronic (analogue and digital) to multidiscipline design. These current needs imply implementation of methodologies to make the CAD product reliable in order to improve time to market, study costs, reusability and reliability of the design process. This paper proposes a high level design approach applied for the characterization and the optimization of Switched-Current Sigma- Delta Modulators. It uses the new hardware description language VHDL-AMS to help the designers to optimize the characteristics of the modulator at a high level with a considerably reduced CPU time before passing to a transistor level characterization. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=high%20level%20design" title="high level design">high level design</a>, <a href="https://publications.waset.org/search?q=optimization" title=" optimization"> optimization</a>, <a href="https://publications.waset.org/search?q=switched-Current%0ASigma-Delta%20Modulators" title=" switched-Current Sigma-Delta Modulators"> switched-Current Sigma-Delta Modulators</a>, <a href="https://publications.waset.org/search?q=VHDL-AMS." title=" VHDL-AMS."> VHDL-AMS.</a> </p> <a href="https://publications.waset.org/14977/high-level-characterization-and-optimization-of-switched-current-sigma-delta-modulators-with-vhdl-ams" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/14977/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/14977/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/14977/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/14977/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/14977/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/14977/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/14977/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/14977/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/14977/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/14977/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/14977.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">1518</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3</span> Design Optimization Methodology of CMOS Active Mixers for Multi-Standard Receivers</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=S.%20Douss">S. Douss</a>, <a href="https://publications.waset.org/search?q=F.%20Touati"> F. Touati</a>, <a href="https://publications.waset.org/search?q=M.%20Loulou"> M. Loulou</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A design flow of multi-standard down-conversion CMOS mixers for three modern standards: Global System Mobile, Digital Enhanced Cordless Telephone and Universal Mobile Telecommunication Systems is presented. Three active mixer-s structures are studied. The first is based on the Gilbert cell which gives a tolerable noise figure and linearity with a low conversion gain. The second and third structures use the current bleeding and charge injection techniques in order to increase the conversion gain. An improvement of about 2 dB of the conversion gain is achieved without a considerable degradation of the other characteristics. The models used for noise figure, conversion gain and IIP3 used are studied. This study describes the nature of trade-offs inherent in such structures and gives insights that help in identifying which structure is better for given conditions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=Active%20mixer" title="Active mixer">Active mixer</a>, <a href="https://publications.waset.org/search?q=Radio-frequency%20transceiver" title=" Radio-frequency transceiver"> Radio-frequency transceiver</a>, <a href="https://publications.waset.org/search?q=Multistandardfront%20end" title=" Multistandardfront end"> Multistandardfront end</a>, <a href="https://publications.waset.org/search?q=Gilbert%20cell" title=" Gilbert cell"> Gilbert cell</a>, <a href="https://publications.waset.org/search?q=current%20bleeding" title=" current bleeding"> current bleeding</a>, <a href="https://publications.waset.org/search?q=charge%20injection." title=" charge injection."> charge injection.</a> </p> <a href="https://publications.waset.org/1269/design-optimization-methodology-of-cmos-active-mixers-for-multi-standard-receivers" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/1269/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/1269/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/1269/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/1269/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/1269/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/1269/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/1269/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/1269/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/1269/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/1269/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/1269.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">2490</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2</span> High Order Cascade Multibit 危螖 Modulator for Wide Bandwidth Applications</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=S.%20Zouari">S. Zouari</a>, <a href="https://publications.waset.org/search?q=H.%20Daoud"> H. Daoud</a>, <a href="https://publications.waset.org/search?q=M.%20Loulou"> M. Loulou</a>, <a href="https://publications.waset.org/search?q=P.%20Loumeau"> P. Loumeau</a>, <a href="https://publications.waset.org/search?q=N.%20Masmoudi"> N. Masmoudi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A wideband 2-1-1 cascaded 危螖 modulator with a single-bit quantizer in the two first stages and a 4-bit quantizer in the final stage is developed. To reduce sensitivity of digital-to-analog converter (DAC) nonlinearities in the feedback of the last stage, dynamic element matching (DEM) is introduced. This paper presents two modelling approaches: The first is MATLAB description and the second is VHDL-AMS modelling of the proposed architecture and exposes some high-level-simulation results allowing a behavioural study. The detail of both ideal and non-ideal behaviour modelling are presented. Then, the study of the effect of building blocks nonidealities is presented; especially the influences of nonlinearity, finite operational amplifier gain, amplifier slew rate limitation and capacitor mismatch. A VHDL-AMS description presents a good solution to predict system-s performances and can provide sensitivity curves giving the impact of nonidealities on the system performance. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=behavioural%20study" title="behavioural study">behavioural study</a>, <a href="https://publications.waset.org/search?q=DAC%20nonlinearity" title=" DAC nonlinearity"> DAC nonlinearity</a>, <a href="https://publications.waset.org/search?q=DEM" title=" DEM"> DEM</a>, <a href="https://publications.waset.org/search?q=%CE%A3%CE%94%0Amodulator" title=" 危螖 modulator"> 危螖 modulator</a>, <a href="https://publications.waset.org/search?q=VHDL-AMS%20modelling." title=" VHDL-AMS modelling."> VHDL-AMS modelling.</a> </p> <a href="https://publications.waset.org/5283/high-order-cascade-multibit-sd-modulator-for-wide-bandwidth-applications" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/5283/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/5283/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/5283/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/5283/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/5283/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/5283/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/5283/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/5283/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/5283/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/5283/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/5283.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">4825</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1</span> A 24-Bit, 8.1-MS/s D/A Converter for Audio Baseband Channel Applications</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=N.%20Ben%20Ameur">N. Ben Ameur</a>, <a href="https://publications.waset.org/search?q=M.%20Loulou"> M. Loulou</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper study the high-level modelling and design of delta-sigma (螖危) noise shapers for audio Digital-to-Analog Converter (DAC) so as to eliminate the in-band Signal-to-Noise- Ratio (SNR) degradation that accompany one channel mismatch in audio signal. The converter combines a cascaded digital signal interpolation, a noise-shaping single loop delta-sigma modulator with a 5-bit quantizer resolution in the final stage. To reduce sensitivity of Digital-to-Analog Converter (DAC) nonlinearities of the last stage, a high pass second order Data Weighted Averaging (R2DWA) is introduced. This paper presents a MATLAB description modelling approach of the proposed DAC architecture with low distortion and swing suppression integrator designs. The 螖危 Modulator design can be configured as a 3rd-order and allows 24-bit PCM at sampling rate of 64 kHz for Digital Video Disc (DVD) audio application. The modeling approach provides 139.38 dB of dynamic range for a 32 kHz signal band at -1.6 dBFS input signal level. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=DVD-audio" title="DVD-audio">DVD-audio</a>, <a href="https://publications.waset.org/search?q=DAC" title=" DAC"> DAC</a>, <a href="https://publications.waset.org/search?q=Interpolator%20and%20Interpolation%0AFilter" title=" Interpolator and Interpolation Filter"> Interpolator and Interpolation Filter</a>, <a href="https://publications.waset.org/search?q=Single-Loop%20%CE%94%CE%A3%20Modulation" title=" Single-Loop 螖危 Modulation"> Single-Loop 螖危 Modulation</a>, <a href="https://publications.waset.org/search?q=R2DWA" title=" R2DWA"> R2DWA</a>, <a href="https://publications.waset.org/search?q=Clock%20Jitter" title=" Clock Jitter"> Clock Jitter</a> </p> <a href="https://publications.waset.org/12990/a-24-bit-81-mss-da-converter-for-audio-baseband-channel-applications" class="btn 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