An untrimmed CMOS amplifier with high CMRR and low offset for sensor applications

An untrimmed CMOS amplifier with high CMRR and low offset for sensor applications

This paper presents a new CMOS amplifier with...

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Main Authors: Zhang, Xiao Ling, Chan, Pak Kwong
Other Authors: School of Electrical and Electronic Engineering
Format: Conference or Workshop Item
Language:English
Published: 2010
Subjects:
DRNTU::Engineering::Electrical and electronic engineering::Electronic circuits
Online Access:https://hdl.handle.net/10356/90453
http://hdl.handle.net/10220/6364
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-904532020-03-07T13:24:46Z An untrimmed CMOS amplifier with high CMRR and low offset for sensor applications Zhang, Xiao Ling Chan, Pak Kwong School of Electrical and Electronic Engineering IEEE Asia Pacific Conference on Circuits and Systems (2008 : Macau) Chartered Semiconductor Manufacturing Ltd DRNTU::Engineering::Electrical and electronic engineering::Electronic circuits This paper presents a new CMOS amplifier with high common-mode rejection ratio (CMRR) and low offset, dedicated to integrated sensors, using total continuous-time design technique but without the need of trimming. This is based on cascading two high-gain differential stages to form a composite front-end gain stage for enhancing CMRR as well as reducing systematic errors, and incorporating an averaging layout technique to reduce the random mismatch errors. Powered by a total 3.3V supply, measurements on 15 samples have shown that the mean and standard deviation of the input-referred offset are 50.4μV and 0.678mV respectively. The proposed amplifier has also achieved CMRR greater than 110dB (0 - 150Hz), offset drift less than 0.8 μV/oC for temperature ranging from –55oC to +125oC, input-referred noise less than 17.47 nV / Hz at 1kHz and active area of 0.117 mm2 in a 0.6 μm CMOS technology. Published version 2010-08-30T06:29:44Z 2019-12-06T17:48:00Z 2010-08-30T06:29:44Z 2019-12-06T17:48:00Z 2008 2008 Conference Paper Zhang, X. L., & Chan, P. K. (2008). An untrimmed CMOS amplifier with high CMRR and low offset for sensor applications. In proceedings of the 9th IEEE Asia Pacific Conference on Circuits and Systems: Macau, China, (pp.802-805). https://hdl.handle.net/10356/90453 http://hdl.handle.net/10220/6364 10.1109/APCCAS.2008.4746144 en © 2008 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. http://www.ieee.org/portal/site This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. 4 p. application/pdf
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic DRNTU::Engineering::Electrical and electronic engineering::Electronic circuits
spellingShingle DRNTU::Engineering::Electrical and electronic engineering::Electronic circuits
Zhang, Xiao Ling
Chan, Pak Kwong
An untrimmed CMOS amplifier with high CMRR and low offset for sensor applications
author2 School of Electrical and Electronic Engineering
author_facet School of Electrical and Electronic Engineering
Zhang, Xiao Ling
Chan, Pak Kwong
format Conference or Workshop Item
author Zhang, Xiao Ling
Chan, Pak Kwong
author_sort Zhang, Xiao Ling
title An untrimmed CMOS amplifier with high CMRR and low offset for sensor applications
title_short An untrimmed CMOS amplifier with high CMRR and low offset for sensor applications
title_full An untrimmed CMOS amplifier with high CMRR and low offset for sensor applications
title_fullStr An untrimmed CMOS amplifier with high CMRR and low offset for sensor applications
title_full_unstemmed An untrimmed CMOS amplifier with high CMRR and low offset for sensor applications
title_sort untrimmed cmos amplifier with high cmrr and low offset for sensor applications
publishDate 2010
url https://hdl.handle.net/10356/90453
http://hdl.handle.net/10220/6364
_version_ 1681046431766413312
description This paper presents a new CMOS amplifier with high common-mode rejection ratio (CMRR) and low offset, dedicated to integrated sensors, using total continuous-time design technique but without the need of trimming. This is based on cascading two high-gain differential stages to form a composite front-end gain stage for enhancing CMRR as well as reducing systematic errors, and incorporating an averaging layout technique to reduce the random mismatch errors. Powered by a total 3.3V supply, measurements on 15 samples have shown that the mean and standard deviation of the input-referred offset are 50.4μV and 0.678mV respectively. The proposed amplifier has also achieved CMRR greater than 110dB (0 - 150Hz), offset drift less than 0.8 μV/oC for temperature ranging from –55oC to +125oC, input-referred noise less than 17.47 nV / Hz at 1kHz and active area of 0.117 mm2 in a 0.6 μm CMOS technology.

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