Improved stability and performance from sigma-delta modulators using 1-bit vector quantization

Lars Risbo

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    Abstract

    A novel class of sigma-delta modulators is presented. The usual scalar 1-b quantizer in a sigma-delta modulator is replaced by a 1-b vector quantizer with a N-dimensional input state-vector from the linear feedback filter. Generally, the vector quantizer changes the nonlinear dynamics of the modulator, and a proper choice of vector quantizer can improve both system stability and coding performance. It is shown how to construct the vector quantizer in order to limit the excursions in state-space. The proposed method is demonstrated graphically for a simple second-order modulator
    Original languageEnglish
    Title of host publicationProceedings of the IEEE International Symposium on Circuits and Systems
    PublisherIEEE
    Publication date1993
    Pages1365-1368
    ISBN (Print)07-80-31281-3
    DOIs
    Publication statusPublished - 1993
    Event1993 IEEE International Symposium on Circuits and Systems - Chicago, IL, United States
    Duration: 3 May 19936 May 1993
    http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=1067

    Conference

    Conference1993 IEEE International Symposium on Circuits and Systems
    Country/TerritoryUnited States
    CityChicago, IL
    Period03/05/199306/05/1993
    Internet address

    Bibliographical note

    Copyright: 1993 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

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