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A low-power bio-sensor interface with wide measurement range

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A low-power bio-sensor interface with wide measurement range

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Title: A low-power bio-sensor interface with wide measurement range
Author: Chai, Y.; Chan, Pak Kwong
Copyright year: 2008
Abstract: A new low-power high dynamic range conductanceto- frequency converter, using relaxation oscillator approach, is proposed for bio-sensor interfacing applications. Enhanced by a leakage current compensation technique, the interface has immunity against input pad ESD leakage current as well as hum noise. The output frequency is linear with respect to sensor conductance, with the maximum systematic error of 0.58% and average error of 0.46% for nanowire sensor resistance from 100 MΩ ~ 1 GΩ. For 2% systematic error, the resistance range of the interfacing system can attain from 5 MΩ to 5 GΩ. The biosensor interface is designed using CSM 0.18 μm CMOS technology, which dissipates 37.2 μW at a single supply of 1.8V and the maximum sensor current.
Subject: DRNTU::Engineering::Electrical and electronic engineering::Electronic apparatus and materials
Type: Conference Paper
Conference name: IEEE Asia Pacific Conference on Circuits and Systems (2008 : Macau)
School: School of Electrical and Electronic Engineering
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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