Design of switched-capacitor filters using low gain amplifiers
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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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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 |
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repository.mail.fl_str_mv |
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_version_ |
1777302888121368576 |