A CMOS class-AB transconductance amplifier for switched-capacitor applications

J.J.F. Rijns, J.J.F. Rijns, Hans Wallinga

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

    1 Citation (Scopus)
    234 Downloads (Pure)

    Abstract

    A CMOS operational transconductance amplifier (OTA) using a fully differential single-stage core OTA as the input stage and a differential to single current converter as the output stage, each biased at a separate current level, is presented. A large gain-bandwidth product (2.7 MHz) and a high slew-rate (5 V/μs) can be obtained by applying a large bias current to the core OTA. Due to the class-AB operation of the output stage, a high output impedance can be obtained by applying a small bias current to the output stage, resulting in a high DC-gain (61.6 dB). When the performance of this class-AB OTA is compared with that of basic single-stage OTAs it is found that the output impedance of the class-AB OTA is increased without limiting the bandwidth or slew-rate
    Original languageEnglish
    Title of host publicationIEEE International Symposium on Circuits and Systems, 1990
    Place of PublicationPiscataway, NJ
    PublisherIEEE
    Pages2801-2804
    Number of pages4
    DOIs
    Publication statusPublished - 1 May 1990
    EventIEEE International Symposium on Circuits and Systems, ISCAS 1990 - New Orleans, USA
    Duration: 1 May 19903 May 1990

    Publication series

    Name
    PublisherIEEE
    Volume4

    Conference

    ConferenceIEEE International Symposium on Circuits and Systems, ISCAS 1990
    Period1/05/903/05/90
    Other1-3 May 1990

    Keywords

    • METIS-113920
    • IR-17035

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