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A low-power switched-capacitor capacitive transducer with high resolution

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A low-power switched-capacitor capacitive transducer with high resolution

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Title: A low-power switched-capacitor capacitive transducer with high resolution
Author: Zhang, Xiao Ling; Chan, Pak Kwong
Copyright year: 2008
Abstract: A new capacitive transducer using a pseudodifferential-input–single-ended output topology for lowpower portable applications is presented. This is based on a switched-capacitor chopper-stabilized pseudodifferential integrator structure that is cascaded with a chopper-stabilized differential difference amplifier, consisting of a single output and a bandpass ac output. The measured results have shown that the transducer integrated circuit, with a sampling rate of 64 kHz in a 0.6-μm CMOS technology, dissipates 820 μA at a 3.3-V supply and exhibits a low noise characteristic. For a 100-Hz bandwidth, the input-referred minimum detectable capacitances are 57.24 and 33.82 aF with reference to the single output and the bandpass output, respectively.
Subject: DRNTU::Engineering::Electrical and electronic engineering
Type: Journal Article
Series/ Journal Title: IEEE transactions on instrumentation and measurement
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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