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Dissertations / Theses on the topic 'Conversor A/D'

Author: Grafiati

Published: 11 September 2021

Last updated: 30 July 2025

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1

Ossa, Wilmar Carvajal. "Projeto de um conversor analógico-digital para um receptor Bluetooth em tecnologia CMOS." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/3/3140/tde-01032011-124050/.

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Neste trabalho aborda-se o projeto de um conversor analógico-digital (ADC) que deve atingir as especificações do padrão Bluetooth. Este bloco faz parte do estágio de recepção de um transceptor sem fio integrado em tecnologia CMOS. Inicialmente é feita a análise do ADC como sistema, ao mesmo tempo que as especificações nesse nível são desenvolvidas. A arquitetura adaptada da literatura é conhecida como time-interleaved pipeline. Os seus principais blocos, o S&H e o estágio básico incluindo o sub-ADC e o MDAC, são explicados posteriormente junto com a estratégia de correção digital através do bi

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Oliveira, Claudia Almerindo de Souza. "Estudo e projeto de um conversor D/A de alta velocidade em tecnologia CMOS." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/3/3140/tde-06082005-105902/.

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Neste trabalho é descrito o projeto e testes de um conversor digital/analógico de alta velocidade fabricado em tecnologia CMOS. O conversor pojetado possui resolução de 6 bits, trabalha em freqüência de 200 MSample/s, e foi fabricado na tecnologia CMOS de 0,35 µm da AMS (Austriamicrosystems), com quatro níveis de metal e 2 de silício policristalino. Uma das principais aplicações dos conversores D/A de alta velocidade é no processamento digital de sinais de vídeo, utilizado em sistemas de vídeo tais como os de TV digital e TVs de alta definição. Nestes sistemas, conversores D/A em tecnologia CM

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LIOY, Paola Karelys Matute. "Uma metodologia de projeto de conversor A/D SAR-PWM híbrido." reponame:Repositório Institucional da UNIFEI, 2017. http://repositorio.unifei.edu.br/xmlui/handle/123456789/1080.

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Submitted by repositorio repositorio (repositorio@unifei.edu.br) on 2018-02-16T22:38:06Z No. of bitstreams: 1 dissertacao_lioy_2017.pdf: 4051324 bytes, checksum: 997cfb22b020ebc9040813ad94f0e423 (MD5)<br>Made available in DSpace on 2018-02-16T22:38:06Z (GMT). No. of bitstreams: 1 dissertacao_lioy_2017.pdf: 4051324 bytes, checksum: 997cfb22b020ebc9040813ad94f0e423 (MD5) Previous issue date: 2017-11<br>Este trabalho propõe uma metodologia de projeto para o desenho de uma nova arquitetura de conversão analógico digital A/D por aproximação sucessiva, com o uso de um circuito modulador de pulso (

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4

Bezerra, Thiago Brito. "DESENVOLVIMENTO DE UM CONVERSOR A/D INTEGRADOR COM FAIXA DE ENTRADA E RESOLUÇÃO PROGRAMÁVEL A CAPACITOR CHAVEADO." Universidade Federal do Maranhão, 2012. http://tedebc.ufma.br:8080/jspui/handle/tede/486.

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Made available in DSpace on 2016-08-17T14:53:20Z (GMT). No. of bitstreams: 1 Tiago Brito Bezerra.pdf: 3848907 bytes, checksum: 09c5f40ad1ac5ce43a253e0335d491da (MD5) Previous issue date: 2012-04-13<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Programmable integrated circuits enable its adjustment after fabrication to fit more than one application within a certain set of applications. A programmable measurement system can be applied to the measurement of different quantities involving a set of sensors with different signal characteristics and employing a single analog-t

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Silva, Verônica Maria Lima. "Conversor A/D com amostragem não-uniforme e passo de quantização adaptativo." Universidade Federal da Paraíba, 2014. http://tede.biblioteca.ufpb.br:8080/handle/tede/5298.

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Made available in DSpace on 2015-05-08T14:57:18Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 3795959 bytes, checksum: 7a11a6cf0b41c67297d55642c2b80df3 (MD5) Previous issue date: 2014-02-21<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>In this work, we analyse different architectures of analog-to-digital converters (ADC) and propose an architecture based on sampling by crossing levels and adaptive quantization step, aiming at reducing the energy required to convert and process specific signals. The proposed architecture has parameters which can be dynamicall

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6

Botura, Junior Galdenoro. "Desenvolvimento de um conversor D/A, não linear, usando o principio da multiplicação/divisão." [s.n.], 1991. http://repositorio.unicamp.br/jspui/handle/REPOSIP/260607.

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Orientador: Alberto Martins Jorge<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica<br>Made available in DSpace on 2018-07-13T22:52:00Z (GMT). No. of bitstreams: 1 BoturaJunior_Galdenoro_D.pdf: 7610299 bytes, checksum: 99e4ac14db7dfa4f0ccafe34071fdb1a (MD5) Previous issue date: 1991<br>Resumo: Não informado<br>Abstract: Not informed.<br>Doutorado<br>Doutor em Engenharia Elétrica

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7

Pinheiro, Marcos Aurélio de Andrade, and Instituto de Engenharia Nuclear. "Análise de imperfeições de bancos QMF e CQF com aplicação a conversão A/D." Instituto de Engenharia Nuclear, 1996. http://carpedien.ien.gov.br:8080/handle/ien/1939.

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Submitted by Marcele Costal de Castro (costalcastro@gmail.com) on 2017-09-27T18:13:29Z No. of bitstreams: 1 MARCOS AURELIO DE ANDRADE PINHEIRO M.pdf: 5114516 bytes, checksum: ad29d339e79cc52aa2257fc4931109af (MD5)<br>Made available in DSpace on 2017-09-27T18:13:29Z (GMT). No. of bitstreams: 1 MARCOS AURELIO DE ANDRADE PINHEIRO M.pdf: 5114516 bytes, checksum: ad29d339e79cc52aa2257fc4931109af (MD5) Previous issue date: 1996-01<br>Sistemas multitaxas e bancos QMF e CQF são estudados como requisito a compreensão do trabalho. E proposta uma fórmula capaz de determinar a relação sinal ruído dos b

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Dias, José Antonio Siqueira 1954. "Projeto de um conversor D/A não linear integrado (Lei A-128) em tecnologia bipolar." [s.n.], 1985. http://repositorio.unicamp.br/jspui/handle/REPOSIP/260605.

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Orientador: Alberto Martins Jorge<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Campinas<br>Made available in DSpace on 2018-07-14T23:39:49Z (GMT). No. of bitstreams: 1 Dias_JoseAntonioSiqueira_D.pdf: 2350996 bytes, checksum: 9501666c0f18757af83a1af1a354e492 (MD5) Previous issue date: 1985<br>Resumo: Neste trabalho apresetamos o projeto completo de um conversor D/A não-linear integrado (Lei A-128), em tecnologia I2L/Linear, que visa atender às especificações dos sistema de transmissão telefônica por modulação de código de pulsos (MCP). O projeto é dividi

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9

Costa, Marcus Vinicius Silveria. "Controladores robustos D-LQI e D-alocaÃÃo de polos otimizados via LMI aplicados a um conversor boost alto ganho com cÃlula de comutaÃÃo trÃs estados." Universidade Federal do CearÃ, 2012. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=8407.

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Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico<br>Este trabalho visa a aplicaÃÃo dos controles robustos D-LQI e D-AlocaÃÃo de polos otimizados via LMIs em um conversor boost de alto ganho de tensÃo com cÃlula de comutaÃÃo de trÃs estados. Este conversor consiste numa topologia moderna derivada do conversor boost clÃssico. O boost Ã considerado um elevador de tensÃo, o qual converte uma entrada na faixa de 42-54V Ã 400 V. O conversor boost proposto Ã reduzido ao modelo de um conversor equivalente e Ã modelado no espaÃo de estados mÃdio, em que Ã observado que a matriz D diferente

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10

Costa, Marcus Vinicius Silvério. "Controladores robustos D-LQI e D-Alocação de polos otimizados via LMI aplicados a um conversor boost alto ganho com célula de comutação três estados." reponame:Repositório Institucional da UFC, 2012. http://www.repositorio.ufc.br/handle/riufc/3975.

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COSTA, M. V. C. Controladores robustos D-LQI e D-Alocação de polos otimizados via LMI aplicados a um conversor boost alto ganho com célula de comutação três estados. 2012. 120 f. Dissertação (Mestrado em Engenharia Elétrica) - Centro de Tecnologia, Universidade Federal do Ceará, Fortaleza, 2012.<br>Submitted by Marlene Sousa (mmarlene@ufc.br) on 2012-10-22T17:40:49Z No. of bitstreams: 1 2012_dis_mvscosta.pdf: 6395955 bytes, checksum: a9bf24496f422ed4b77578ed372aaf7c (MD5)<br>Approved for entry into archive by Marlene Sousa(mmarlene@ufc.br) on 2012-10-22T17:43:31Z (GMT) No. of bitstreams: 1 201

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Dutra, S?lvio Cesar Antunes. "Estudo do conversor D : an?lises qualitativa e quantitativa, crit?rios de dimensionamento e modelagem em espa?o de estados." Pontif?cia Universidade Cat?lica do Rio Grande do Sul, 2018. http://tede2.pucrs.br/tede2/handle/tede/8339.

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Submitted by PPG Engenharia El?trica (engenharia.pg.eletrica@pucrs.br) on 2018-10-31T13:57:50Z No. of bitstreams: 1 SILVIO CESAR ANTUNES DUTRA_DIS.pdf: 2550584 bytes, checksum: 3dae5cef4ef20b66d5c7a4db79ae5cad (MD5)<br>Approved for entry into archive by Sheila Dias (sheila.dias@pucrs.br) on 2018-11-01T11:50:43Z (GMT) No. of bitstreams: 1 SILVIO CESAR ANTUNES DUTRA_DIS.pdf: 2550584 bytes, checksum: 3dae5cef4ef20b66d5c7a4db79ae5cad (MD5)<br>Made available in DSpace on 2018-11-01T12:00:28Z (GMT). No. of bitstreams: 1 SILVIO CESAR ANTUNES DUTRA_DIS.pdf: 2550584 bytes, checksum: 3dae5cef4ef20b66d5

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Rodrigues, Pedro Miguel Oliveira. "Conversão D/A no domínio ótico, aplicações em iluminação e comunicação." Master's thesis, Universidade de Aveiro, 2015. http://hdl.handle.net/10773/16314.

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Mestrado em Engenharia Eletrónica e Telecomunicações<br>A evolução ao longo do tempo dos dispositivos usados para a iluminação torna possível novas soluções quer no âmbito da iluminação quer agora nas comunicações. Assim a presente dissertação pretende tratar a temática dos circuitos de controlo de fluxo luminoso para sistemas de comunicação por luz visível. Esta dissertação insere-se num projeto que pretende delinear e implementar um sistema de comunicação por luz visível desde a camada tratamento de dados, códigos de correcção de erros, emissor (onde esta se insere) e modulação de dad

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Toledo, Yuri Cesar Rosa de. "Projeto de uma nova arquitetura para conversores de sinais analógicos para digitais." reponame:Repositório Institucional da UnB, 2015. http://dx.doi.org/10.26512/2015.03.D.20097.

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Dissertação (mestrado)—Universidade de Brasília, Faculdade de Tecnologia, Departamento de Engenharia Elétrica, Programa de Pós-graduação em Engenharia Elétrica, 2015.<br>Submitted by Fernanda Percia França (fernandafranca@bce.unb.br) on 2015-12-15T16:02:30Z No. of bitstreams: 1 2015_YuriCesarRosadeToledo.pdf: 6155328 bytes, checksum: 3210a42c4e0be7b53fc6874fc8293d47 (MD5)<br>Approved for entry into archive by Marília Freitas(marilia@bce.unb.br) on 2016-05-04T12:54:49Z (GMT) No. of bitstreams: 1 2015_YuriCesarRosadeToledo.pdf: 6155328 bytes, checksum: 3210a42c4e0be7b53fc6874fc8293d47 (MD5)<

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Fox, Brian L. "Analysis and Dynamic Range Enhancement of the Analog-to-Digital Interface in Multimode Radio Receivers." Thesis, Virginia Tech, 1997. http://hdl.handle.net/10919/35868.

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The rapidly developing wireless market has spawned a multitude of different standards for cellular, PCS, and wireless data. To allow users the ability to access services conforming to disparate standards, multimode handsets capable of software reconfiguration are needed. These "software radios" are distinguished from their traditional counterparts by their strong reliance on digital channel filtering and demodulation which may be reprogrammed to receive different standards. In these radios, higher dynamic range is required from the analog portion, most notably, the analog-to-digital co

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Karlsson, Magnus. "Direktsamplande digital transciever." Thesis, Linköping University, Department of Science and Technology, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1658.

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<p>Master thesis work at ITN (Department of Science and Technology) in the areas of A/D-construction and RF-circuit design. Major goal of project were to research suitable possibilities for implementations of direct conversion in transceivers operating in the 160MHz band, theoretic study followed by development of components in the construction environment Cadence. Suitable A/D- converter and other important parts were selected at the end of the theoretic study. Subsampling technique was applied to make A/D sample requirements more realistic to achieve. Besides lowering requirements on A/D-con

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Špaček, Jan. "D/A převodník pro audio s externím ovládáním pomocí mikrokontroléru." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219725.

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This diploma thesis is devoted to the design of a laboratory measurement tool with DAC converter for audio and low frequency signals. In the introduction part a theoretical background of the ADC and DAC conversions are outlined. In the next chapters the technical solution of the laboratory converter is presented, including DAC with integrated circuit AD1852 and completed with digital audio receiver CS8416. This circuit secures compatibility with external audio devices with digital interfaces, like SPDIF or AES3. The digital receiver and audio DAC are added with serial communication interface f

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Panáček, Jiří. "Měřicí pracoviště pro simulaci a testování převodníků AD a DA." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218686.

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The objective of this thesis is a design of a development kit, which is used in laboratories during the lessons of Theory of analog to digital conversion subject. This device is adapted for basic measuring and understanding of digital to analog (D/A) and analog to digital (A/D) converters and contains sigma-delta A/D converter made of basic elements, D/A converter with R-2R resistor net, active low pass frequency filter (Sallen-Key), PWM generator, SAR A/D converter with 16 b resolution, reference voltage source and module for measuring integral and differential nonlinearity of A/D converters.

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Docef, Alen. "Efficient structures for oversampling A/D conversion." Thesis, Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/14975.

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West, Adrian G. "Psych D in clinical psychology conversion programme." Thesis, University of Surrey, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326498.

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Coady, Edmond Patrick. "Pipelined multi-step interpolating A/D converter." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/36029.

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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.<br>Includes bibliographical references (p. 97-98).<br>by Edmond Patrick Coady.<br>M.S.

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Jakobs, Béatrice [Verfasser]. "›Conversio‹ im Zeitalter von Reformation und Konfessionalisierung. : ›Écrit de conversion‹ als neue literarische Form. / Béatrice Jakobs." Berlin : Duncker & Humblot, 2014. http://d-nb.info/1238433413/34.

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Brukner, Jan. "Non-Parallel Voice Conversion." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2020. http://www.nusl.cz/ntk/nusl-417207.

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Cílem konverze hlasu (voice conversion, VC) je převést hlas zdrojového řečníka na hlas cílového řečníka. Technika je populární je u vtipných internetových videí, ale má také řadu seriózních využití, jako je dabování audiovizuálního materiálu a anonymizace hlasu (například pro ochranu svědků). Vzhledem k tomu, že může sloužit pro spoofing systémů identifikace hlasu, je také důležitým nástrojem pro vývoj detektorů spoofingu a protiopatření. Modely VC byly dříve trénovány převážně na paralelních (tj. dva řečníci čtou stejný text) a na vysoce kvalitních audio materiálech. Cílem této práce bylo

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Hiorns, R. E. "D.S.P. of circuit design for P.W.M. D/A conversion." Thesis, King's College London (University of London), 1994. https://kclpure.kcl.ac.uk/portal/en/theses/dsp-of-circuit-design-for-pwm-da-conversion(5da641f8-747f-42ff-be70-c0e0bed22676).html.

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Chew, Tung Shen. "A 19-bit monolithic charge-balancing A/D converter." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/84880.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2013.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 93-94).<br>Existing high-resolution ADC topologies are expensive, complicated and vulnerable to switch leakage at high temperature. This thesis introduces the Modified Landsburg ADC, a high-resolution converter optimized for minimum cost and die area. Switch resistance cancellation, charge-injection compensation and auto-zero methods are used to build a simple and robust ADC which will op

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Wnorowski, James J. "Increasing A/D conversion resolution by dynamic scale adjustment." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/46536.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2008.<br>Includes bibliographical references (p. 37).<br>Dual-Ranging analog-to-digital systems create performance gains by exploiting the dynamic range of certain classes of signals. This thesis explores the improvements possible when using a dual-ranging system to gain resolution when digitizing audio waveforms. Experiments indicate between 3 to 6 dB of possible improvement, results comparable to gains attainable through other techniques.<br>by James J. Wnorowski.<br>M.Eng.

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Jimenez, David. "Two problems in signal quantization and A/D conversion." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/24637.

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Thesis (Ph.D.)--Mathematics, Georgia Institute of Technology, 2008.<br>Committee Chair: Yang Wang; Committee Member: Christopher Heil; Committee Member: Doron Lubinsky; Committee Member: Guillermo Goldsztein; Committee Member: Steven W. McLaughlin

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Kim, Jintae. "Multi-level design optimizations of pipelined A/D converter." Diss., Restricted to subscribing institutions, 2008. http://proquest.umi.com/pqdweb?did=1790313751&sid=9&Fmt=2&clientId=1564&RQT=309&VName=PQD.

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Hu, Jason. "Low-power dynamic amplifiers for pipelined A/D conversion /." May be available electronically:, 2008. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.

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Bougan, Timothy B. "“DATA DIGITIZING UNIT” ELIMINATES THE NEED FOR ANALOG RECORDERS." International Foundation for Telemetering, 1996. http://hdl.handle.net/10150/608382.

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International Telemetering Conference Proceedings / October 28-31, 1996 / Town and Country Hotel and Convention Center, San Diego, California<br>Today’s telemetry environment is becoming increasingly digital. Highly reliable and relatively inexpensive digital recorders readily available, and most telemetry facilities are migrating away from the older analog recorders which are difficult to calibrate and expensive to maintain. Unfortunately, most site managers find they still have one or more “legacy” signals (such as FM-FM, PAM, and pre-detect PCM) that still require analog recording. To

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Korhonen, E. (Esa). "On-chip testing of A/D and D/A converters:static linearity testing without statistically known stimulus." Doctoral thesis, University of Oulu, 2010. http://urn.fi/urn:isbn:9789514263064.

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Abstract The static linearity testing of analog-to-digital and digital-to-analog converters (ADCs and DACs) has traditionally required test instruments with higher linearity and resolution than that of the device under test. In this thesis ways to test converters without expensive precision instruments are studied. A novel calculation algorithm for the ADC differential non-linearity (DNL) and integral non-linearity (INL) estimation is proposed. The algorithm assumes that two stimuli with constant offset between them are applied to the ADC under test and that the code density histograms for bot

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Bečková, Zuzana. "Návrh AD převodníku pro senzorové aplikace." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-242185.

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Diplomová práce obsahuje stručný teoretický základ pro designéra/ku A/D převodníku v technologii CMOS a přehled architektur A/D převodníků používaných v automobilovém průmyslu. Volba vhodné architektury pro konkrétní aplikaci byla zásadním úkolem zpra- covaným v semestrálním projektu předcházejícím tuto práci a je rovněž součástí této práce. Analýza v Matlabu, ze které by mělo vyplynout, je-li třeba zahrnout do architek- tury podblok Sample and Hold, je také součástí práce. Klíčovou částí práce je dokumen- tace návrhu jednotlivých podbloků A/D převodníku – operačního zesilovače, kompará- toru

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Carillon, Thierry. "Valorisation d'hydrolysats de matière végétale : procédé de séparation du D-xylose et du D-mannose." Toulouse, INPT, 1987. http://www.theses.fr/1987INPT007G.

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Un procede de separation chromatographique du d-xylose et du d-mannose est mis au point. Une analyse bibliographique des differentes methodes de separation des monosaccharides a permis de choisir la chromatographie d'echange de ligand sur resines echangeuses de cations. Les mecanismes de complexation sont discutes en relation avec le choix du contre ion et la structure des sucres. L'influence des differents facteurs est etudiee a l'aide de plans d'experiences. Un modele de separation chromatographique est propose et adapte au cas du d-xylose et du d-mannose. La modelisation a permis le dimensi

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Ertan, Sevgi 1976. "Comparison of two bandpass delta-sigma A/D converter architectures." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/86435.

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Li, Jason C. (Jason Chianse). "Integration of an imaging system and A/D converter system." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/43381.

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Lau, Yanlok Charlotte 1979. "A high-speed cascaded folding and interpolating A/D converter." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/29683.

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Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2003.<br>Includes bibliographical references (p. 85-86).<br>The folding and interpolating technique has been introduced to CMOS analog-to- digital converter (ADC) in the 1980's. It has successfully reduced the number of comparators required while preserving the benefits of a flash ADC. However, similar to flash ADC, folding and interpolating ADC is also limited to low resolution, due to its complication in the folding operation. Cascaded folding and interpolating architecture is then a

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Maňas, Stanislav. "Adaptabilní obrazový A/D převodník." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219829.

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Master's Thesis deals with the complete proposal of light adaptability A/D converter. In the second chapter there are describes types of sensors. Third one describes the most used methods of light adaptability. In the fourth chapter there is describe the adaptability A/D conversion. Chapter 5 describes the block diagram. In the sixth chapter there is the design of all blocks of A/D converter. Finally in the chapter 7 there are construction documents for realization.

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Silva, Alexandre Herculano Mendes. "Pipelined analog-to-digital conversion using current-mode reference shifting." Master's thesis, Faculdade de Ciências e Tecnologia, 2012. http://hdl.handle.net/10362/8265.

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Dissertação para obtenção do grau de Mestre em Engenharia Electrotécnica e de Computadores<br>Pipeline Analog-to-digital converters (ADCs) are the most popular architecture for high-speed medium-to-high resolution applications. A fundamental, but often unreferenced building block of pipeline ADCs are the reference voltage circuits. They are required to maintain a stable reference with low output impedance to drive large internal switched capacitor loads quickly. Achieving this usually leads to a scheme that consumes a large portion of the overall power and area. A review of the literature sho

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Menouni, Rachid. "Maintien des prophages dans les génomes d' entérobactéries." Thesis, Aix-Marseille, 2014. http://www.theses.fr/2014AIXM4008.

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Les bactériophages sont les virus spécifiques des bactéries. Ils sont considérés comme les entités biologiques les plus abondantes de la biosphère (1031 au total). Une grande partie des bactériophages sont dits tempérés de part leur propriété à intégrer leur génome dans celui de leur hôte et à s'y maintenir en état de réplication passive appelé lysogénie. Les gènes de prophages apportent de nouvelles propriétés à l'hôte via la conversion lysogénique. De nombreux prophages défectifs et fonctionnels sont maintenus dans les génomes bactériens. Nous avons émis l'hypothèse que des stratégies de mai

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Bao, Zhihao. "Conversion of 3-D nanostructured biosilica templates into non-oxide replicas." Diss., Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/33983.

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Diatoms possess characteristics such as abundance, diversity, and high reproductivity, which make their nano-structured frustules (diatom frustules) attractive for a wide range of applications. To overcome the limitation of their silica based frustule composition, diatom frustules have been converted into a variety of materials including silicon, silicon carbide, silver, gold, palladium and carbon in the present study. The compositions and the extent of shape preservation of the replicas are examined and evaluated with different characterization methods such as X-ray diffraction, SEM, TEM and

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Zavari, Rod. "A high-speed CMOS A/D converter employing variable nonuniform quantization." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0024/MQ34143.pdf.

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Sculley, Terry Lee. "Achieving high speed, high precision A/D conversion using nonlinearity correction." Diss., Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/13424.

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Silva, Pedro Miguel Cunha da. "Design of A/D converter for a CMOS-based Magnetic Imaging Sensor." Master's thesis, 2016. http://hdl.handle.net/1822/46655.

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Dissertação de mestrado integrado em Engenharia Electrónica Industrial e de Computadores<br>Este trabalho tem como principal objetivo o desenvolvimento de um Conversor Analógico Digital (ADC), desde a definição da arquitetura, simulação de alto e baixo nível e implementação em CMOS. O ADC a ser desenvolvido faz parte de um sistema que tem como objetivo principal o mapeamento magnético de diferentes corpos através de diversos sensores analógicos concebidos para o efeito, de maneira a que essa mesma imagem magnética possa ser posteriormente processada e analisada num sistema computorizado.

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Querido, Fábio Emanuel Ferreira. "Projeto de um altifalante digital." Master's thesis, 2014. http://hdl.handle.net/10362/14095.

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Devido ao crescente desenvolvimento das nanotecnologias, estando associadas a melhoria da eficiência energética assim como mais processamento de dados e a redução dos custos, esta dissertação possibilita todo o enquadramento com sistemas modernos ao nível do áudio digital. Tendo como base esta perspetiva, esta dissertação apresenta um sistema de áudio completo desde a fonte do sinal digital no PC até ao sinal analógico no altifalante. O sistema é constituído pelos seguintes módulos: a interface do utilizador no PC, o Processador Digital de Sinais (DSP), o amplificador digital e os altif

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Gomes, Rosário Domingos. "Desenvolvimento de uma scooter elétrica." Master's thesis, 2019. http://hdl.handle.net/10198/22971.

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Este projeto apresenta a conceção de um conjunto de circuitos eletrónicos de controlo de potência para acionar um motor de corrente contínua de uma Scooter Elétrica, com base num micro-controlador. O acionamento do Motor da Scooter é feito através de um sinal PWM, com base na plataforma Arduino. O sinal PWM é utilizado para controlar o MOSFET da ponte-H (acionador), corrigindo a velocidade para a desejada. Os sinais provenientes dos sensores de corrente, tensão e temperatura, são processados pelos seus circuitos de condicionamento de sinal e são adquiridos para o microcontrolador que convert

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Gupta, Shivani. "A 1-m W, 14-bit [sigma] [delta] A/D converter with 10-KHz conversion rate." Thesis, 1995. http://hdl.handle.net/1957/35324.

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Tseng, Jiunn-Chin, and 曾俊欽. "A 8-bit 280MS/s Multiple Sampling Single Conversion CMOS A/D Converter for IQ Demodulation." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/58317040590469174874.

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碩士<br>國立交通大學<br>電子研究所<br>84<br>In this thesis, a CMOS 70 MHz IF Quadrature demodulator is presented. This IFdemodulator uses the sample-and-hold ckt operated at 4 times IF frequency,280MHz The IF modulated signal is sampled successively to different capacitors in samplingcapacitor array of I and Q channel(The capacitor ratios in sampling capacitor arrayrepresent the coefficient of IQ channel filter).The filter function is achievedby analog charge addition in sampling capacitors.The resulta

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Wu, Lei. "Low-voltage pipeline A/D converter." Thesis, 1999. http://hdl.handle.net/1957/33270.

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Continuous process scale-down and emerging markets for low-power/low-voltage mobile systems call for low-voltage analog integrated circuits. Switched-capacitor (SC) circuits are the building blocks for analog signal processing and will encounter severe overdrive problems when operating at low voltage conditions. There exist three techniques to solve the problem, but with their own limitations. Multi-threshold process increases cost. Boosted clock will cause life time reliability issues. Switched-opamp slows down the speed of operation. A new low-voltage SC technique without special process and

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Chang, Shan-Wen, and 張獻文. "Current-Mode Pipelined A/D Converter." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/88821925942456651374.

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碩士<br>逢甲大學<br>電機工程所<br>91<br>In recent days, the CMOS digital integrated circuits have been successfully utilized in many applications. It is highly relied on the data converters to improve the overall systems performance. In this thesis, a current-mode pipelined A/D converter (IADC) without sample-and-hold circuit is designed and analyzed. In the IADC architecture, each 1-bit pipelined stage consists of current-mirror circuits, one current comparator, and delay elements. This architecture can achieve a very high conversion rate due to the lack of sample/hold circuit. From HSPICE simulation re

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Wu, Wen-Hsiang, and 吳文祥. "Pipelined A/D Converter Design Automation." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/6j64e5.

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碩士<br>國立臺北科技大學<br>電腦與通訊研究所<br>97<br>Pipelined A/D converter Design Automation from system to circuit is presented inthis paper. The pipelined A/D converter design flow can be separated into the system and circuit level design. It often adopts Matlab Simulink for the system level design ,makes simulation modules to realize a current system and simulates non-idea effects.Besides, we used simulated annealing algorithm to find the system parameters out and to achieve design optimization.We utilizes circuit simulator like Cadence Spectre for the circuit level design,apples software Neocircuit to de

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Wu, Chia-Hasn, and 吳佳勳. "High-Efficiency D-Type Resonant Converter." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/px77gq.

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碩士<br>崑山科技大學<br>電機工程研究所<br>102<br>This paper proposed a high efficiency power converter in which the class D resonant converter as the main structure, with a simple circuit structure, small size, light weight, low switching losses, low cost price advantages.The use of resonant slots are composed of inductance and capacitance to produce resonant voltage and current required by zero voltage or zero current switching to achieve soft switching technique to reduce switching loss caused in the switch,to obtain the desired output voltage and output current. The paper also analyzed the operating chara

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