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Minimum input sensitivity of high-order multi-stage sigma–delta modulator with first-order front-end

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Minimum input sensitivity of high-order multi-stage sigma–delta modulator with first-order front-end

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Title: Minimum input sensitivity of high-order multi-stage sigma–delta modulator with first-order front-end
Author: Ong, C. K.; Siek, Liter; Ng, L. S.
Copyright year: 2000
Abstract: Employing multi-stage sigma–delta modulators has provided an effective means of eliminating stability problems while achieving highresolution analog-to-digital conversion. However, component matching has become more stringent than a single-stage modulator. Mismatches cause loss in the modulators signal-to-noise ratio (SNR), but to a certain class of multi- stage modulators, discontinuity is also apparent in its SNR characteristics. This class of modulators employs a first-order modulator in its first stage. The discontinuity is caused by the nonlinearity of a first-order modulator’s noise, which is related to the minimum input requirement for the first-order modulator. This brief includes the formulation of the firstorder modulator’s minimum amplitude, nonlinear characteristics, and its effect on multi-stage modulators.
Subject: DRNTU::Engineering::Electrical and electronic engineering.
Type: Journal Article
Series/ Journal Title: IEEE transactions on circuits and systems-II : analog and digital signal processing
School: School of Electrical and Electronic Engineering
Rights: © 2000 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.
Version: Published version

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