Design of switched-capacitor filters using low gain amplifiers

Detalhes bibliográficos
Autor(a) principal: Serra, Hugo Alexandre de Andrade
Data de Publicação: 2012
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10362/8214
Resumo: Dissertação para obtenção do Grau de Mestre em Engenharia Electrotécnica e de Computadores
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spelling Design of switched-capacitor filters using low gain amplifiersFully-differential voltage combinerParasitic capacitances compensationSallen-Key topologiesSource follower with gds compensationSwitched-capacitor circuitsDissertação para obtenção do Grau de Mestre em Engenharia Electrotécnica e de ComputadoresAnalog filters are extremely important blocks in several electronic systems such as RF transceivers or sigma delta modulators. They allow selecting between signals with different frequency and eliminating unwanted signals. In modern deep-submicron CMOS technologies the intrinsic gain of the transistors is low and has a large variability, making the design of moderate and high gain amplifiers extremely difficult. The objective of this thesis is to study switched-capacitor (SC) circuits based on the low-pass and band-pass Sallen-Key topologies, since they do not require high gain amplifiers. The strategy used to achieve this objective is to replace the operational amplifier (opamp) with a voltage buffer. Doing this simplifies the design of the amplifier although it also eliminates the virtual ground node from the circuit. Without this node parasitic insensitive SC networks cannot be used. Due to modern parasitic extraction software that can reliably predict the values of parasitic capacitances, the historical disadvantage of parasitic sensitive SC networks (parallel SC) is no longer critical, allowing its influence to be compensated during the design process. Different types of switches were simulated to determine the one with the least nonlinear effects. Two techniques (common mode voltage adjustment and source degeneration) were used to reduce the distortion introduced by the buffers. Low-pass (second and sixth order) and band-pass (second and fourth order) SC filters were simulated in differential configuration in standard 130 nm CMOS technology, having obtained for the low-pass filter a distortion of -62 dB for the biquad section and -54 dB for the sixth-order filter, for a cutoff frequency of 1MHz and when operating at 100 MHz of clock frequency. The total power consumption was 986 W and 5.838 mW, respectively.Faculdade de Ciências e TecnologiaPaulino, NunoRUNSerra, Hugo Alexandre de Andrade20122012-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10362/8214enginfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-10T15:27:44ZPortal AgregadorONG
dc.title.none.fl_str_mv Design of switched-capacitor filters using low gain amplifiers
title Design of switched-capacitor filters using low gain amplifiers
spellingShingle Design of switched-capacitor filters using low gain amplifiers
Serra, Hugo Alexandre de Andrade
Fully-differential voltage combiner
Parasitic capacitances compensation
Sallen-Key topologies
Source follower with gds compensation
Switched-capacitor circuits
title_short Design of switched-capacitor filters using low gain amplifiers
title_full Design of switched-capacitor filters using low gain amplifiers
title_fullStr Design of switched-capacitor filters using low gain amplifiers
title_full_unstemmed Design of switched-capacitor filters using low gain amplifiers
title_sort Design of switched-capacitor filters using low gain amplifiers
author Serra, Hugo Alexandre de Andrade
author_facet Serra, Hugo Alexandre de Andrade
author_role author
dc.contributor.none.fl_str_mv Paulino, Nuno
RUN
dc.contributor.author.fl_str_mv Serra, Hugo Alexandre de Andrade
dc.subject.por.fl_str_mv Fully-differential voltage combiner
Parasitic capacitances compensation
Sallen-Key topologies
Source follower with gds compensation
Switched-capacitor circuits
topic Fully-differential voltage combiner
Parasitic capacitances compensation
Sallen-Key topologies
Source follower with gds compensation
Switched-capacitor circuits
description Dissertação para obtenção do Grau de Mestre em Engenharia Electrotécnica e de Computadores
publishDate 2012
dc.date.none.fl_str_mv 2012
2012-01-01T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10362/8214
url http://hdl.handle.net/10362/8214
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Faculdade de Ciências e Tecnologia
publisher.none.fl_str_mv Faculdade de Ciências e Tecnologia
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv
repository.mail.fl_str_mv
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