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

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

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Title: An untrimmed CMOS amplifier with high CMRR and low offset for sensor applications.
Author: Zhang, Xiao Ling.; Chan, Pak Kwong.
Copyright year: 2008
Abstract: 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.
Subject: DRNTU::Engineering::Electrical and electronic engineering::Electronic circuits.
Type: Conference Paper
Conference name: IEEE Asia Pacific Conference on Circuits and Systems (2008 : Macau)
School: School of Electrical and Electronic Engineering
Related Organization: Chartered Semiconductor Manufacturing Ltd
Rights: © 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.
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