A design method for active high-CMRR fully-differential circuits

A simple method for designing instrumentation fully-differential (FD) circuits based on standard single-ended (SE) operational amplifiers (OAs) is presented. It departs from a SE prototype that verifies the desired differential-mode transfer function, thereby leading to FD versions of the circuit. T...

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Detalles Bibliográficos
Autores principales: Spinelli, Enrique Mario, Hornero, Gemma, Casas, Oscar, Haberman, Marcelo Alejandro
Formato: Articulo
Lenguaje:Inglés
Publicado: 2012
Materias:
Ingeniería
instrumentation circuits
operational amplifiers
OAs
differential circuits
fully-differential processing
analogue signal processing
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/128256
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-128256
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ingeniería
instrumentation circuits
operational amplifiers
OAs
differential circuits
fully-differential processing
analogue signal processing
spellingShingle Ingeniería
instrumentation circuits
operational amplifiers
OAs
differential circuits
fully-differential processing
analogue signal processing
Spinelli, Enrique Mario
Hornero, Gemma
Casas, Oscar
Haberman, Marcelo Alejandro
A design method for active high-CMRR fully-differential circuits
topic_facet Ingeniería
instrumentation circuits
operational amplifiers
OAs
differential circuits
fully-differential processing
analogue signal processing
description A simple method for designing instrumentation fully-differential (FD) circuits based on standard single-ended (SE) operational amplifiers (OAs) is presented. It departs from a SE prototype that verifies the desired differential-mode transfer function, thereby leading to FD versions of the circuit. These circuits have a high common mode rejection ratio (CMRR), independent of component imbalances, and a unity common-mode gain. The proposed method does not allow the design of common-mode response, but it does verify common-mode stability, thus ensuring stable FD circuits. It is intended for instrumentation applications in which high CMRRs are required. The proposed approach makes it possible to design and implement inverter and non-inverter topologies as well. Design examples and experimental data are presented. Using general-purpose OAs and 5%-tolerance components, the CMRR of these circuits easily exceeds 90 to 100 dB.
format Articulo
Articulo
author Spinelli, Enrique Mario
Hornero, Gemma
Casas, Oscar
Haberman, Marcelo Alejandro
author_facet Spinelli, Enrique Mario
Hornero, Gemma
Casas, Oscar
Haberman, Marcelo Alejandro
author_sort Spinelli, Enrique Mario
title A design method for active high-CMRR fully-differential circuits
title_short A design method for active high-CMRR fully-differential circuits
title_full A design method for active high-CMRR fully-differential circuits
title_fullStr A design method for active high-CMRR fully-differential circuits
title_full_unstemmed A design method for active high-CMRR fully-differential circuits
title_sort design method for active high-cmrr fully-differential circuits
publishDate 2012
url http://sedici.unlp.edu.ar/handle/10915/128256
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