Amplificadores de instrumentação integrados de baixo consumo e baixo ruído para aplicações portáteis voltadas ao tratamento de biosinais
This work presents some proposals for low-power and low-noise instrumentation amplifiers aimed at biopotential conditioning, using 0.5 µm CMOS technology. Firstly a theoretical framework about the treatment of biopotentials for wearable and/or portable applications is presented. Following is done...
Na minha lista:
| Autor principal: | |
|---|---|
| Outros Autores: | |
| Formato: | Dissertação |
| Idioma: | pt_BR |
| Publicado em: |
Brasil
|
| Assuntos: | |
| Endereço do item: | https://repositorio.ufrn.br/jspui/handle/123456789/27781 |
| Tags: |
Adicionar Tag
Sem tags, seja o primeiro a adicionar uma tag!
|
| Resumo: | This work presents some proposals for low-power and low-noise instrumentation amplifiers aimed at biopotential conditioning, using 0.5 µm CMOS technology. Firstly a
theoretical framework about the treatment of biopotentials for wearable and/or portable
applications is presented. Following is done a state of the art review for low power and
low noise instrumentation amplifier architectures. A study about the types of pseudoresistors presented in the literature is also performed. Once this is done, the methodology
used to perform this work is presented. Two OTA (Transconductance Operational Amplifier) architectures were selected to compare noise and consumption, namely: FoldedCascode and Current-Mirror. Current-Mirror topology showed better behavior related
to consumption and gain, while Folded-Cascode behaved better related to the noise. It
is also proposed a methodology for comparative analysis of pseudo resistors, in order
to choose one that optimally meets the requirements of high resistance and low variability. Three instrumentation amplifiers have been implemented: two one-stage amplifiers
(single-ended and fully-differential), and one with two-stages, in order to meet gain and
frequency requirements for the entire range of the biopotentials. The results shown that
the three configurations meet the specifications for use in low power and low noise acquisition systems for portable biosignal applications. |
|---|