A receiver with in-band IIP3>20dBm, exploiting cancelling of OpAmp finite-gain-induced distortion via negative conductance

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    Abstract

    Highly linear CMOS radio receivers increasingly exploit linear RF V-I conversion and passive down-mixing, followed by an OpAmp based Transimpedance Amplifier at baseband. Due to the finite OpAmp gain in wideband receivers operating with large signals, virtual ground is imperfect, inducing distortion currents. We propose to apply a negative conductance to cancel this distortion. In an RF receiver, this increases In-Band IIP3 from 9dBm to >20dBm, at the cost of 1.5dB extra NF and <10% power penalty. In 1MHz bandwidth, a Spurious-Free Dynamic Range of 85dB is achieved at <27mA up to 2GHz for 1.2V supply voltage.
    Original languageEnglish
    Title of host publicationIEEE Radio Frequency Integrated Circuits Symposium, RFIC 2013
    Place of PublicationPiscataway
    PublisherIEEE
    Pages85-88
    Number of pages4
    ISBN (Electronic)978-1-4673-6062-3
    ISBN (Print)978-1-4673-6059-3
    DOIs
    Publication statusPublished - 3 Jun 2013
    Event2013 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2013 - Washington State Convention Center, Seattle, United States
    Duration: 2 Jun 20134 Jun 2013

    Publication series

    NameProceedings IEEE Radio Frequency Integrated Circuits Symposium (RFIC)
    PublisherIEEE Press
    Volume2013
    ISSN (Print)1529-2517
    ISSN (Electronic)2375-0995

    Conference

    Conference2013 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2013
    Abbreviated titleRFIC
    Country/TerritoryUnited States
    CitySeattle
    Period2/06/134/06/13

    Keywords

    • mixer-first receiver architecture
    • EWI-23469
    • Receiver linearity
    • IR-87488
    • in-band and out-band IIP3
    • METIS-299975
    • operational amplifier

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