A 3rd Order Low Power SI Sigma-Delta A/D Converter for Voice-Band Applications

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    Abstract

    This paper presents a 3rd order switched current-ΣΔ-modulator. The ΣΔ-modulator operates at a sampling rate of fs=600 kHz and the signal band is fb=5.5 kHz, i.e., an oversampling factor of R=54.5 is used. Multiple input signals are used to reduce the internal signal swings which results in reduced power consumption. The shaping of the noise from the 2nd and 3rd integrator is used to allow the noise power from these integrators to be increased to further save power. The total power consumption is approximately 2.5 mW with a supply voltage of VDD =3.3 V. The maximum SNR is approximately 74.5 dB
    Original languageEnglish
    Title of host publicationProc. 1997 IEEE International Symposium on Circuits and Systems
    Place of PublicationPiscataway
    PublisherIEEE
    Publication date1997
    Pages69-72
    ISBN (Print)0-7803-3583-X
    DOIs
    Publication statusPublished - 1997
    Event1997 IEEE International Symposium on Circuits and Systems (ISCAS'97) - Hong Kong
    Duration: 1 Jan 1997 → …

    Conference

    Conference1997 IEEE International Symposium on Circuits and Systems (ISCAS'97)
    CityHong Kong
    Period01/01/1997 → …

    Bibliographical note

    Copyright: 1997 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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