Wide Band CMOS Low-Noise Amplifier Exploiting Noise Cancellation

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademic

    581 Downloads (Pure)


    Well-known elementary wide band amplifiers suffer from a fundamental trade-off between noise factor and source impedance matching, which limits their noise figure (NF) to values typically above 3dB. Negative feedback can be employed to break this trade-off, thus allowing lower noise figures, however, at the price of potential instability. In contrast, this paper describes a novel feed-forward noise cancelling technique, which allows for design wide band Low Noise Ampliers (LNAs) with sub 3dB noise figure, without suffering from instability issues. This technique is also robust and easy to use. Measurements on a wide band LNA realised in 0.25μm standard CMOS show NF values below 2.4dB over more than one decade of bandwidth and below 2dB over more than two octaves.
    Original languageUndefined
    Title of host publication13th ProRISC Workshop on Circuits, Systems and Signal Processing
    Place of PublicationUtrecht
    Number of pages8
    ISBN (Print)90-73461-33-2
    Publication statusPublished - Nov 2002
    Event13th Workshop on Circuits, Systems and Signal Processing, ProRISC 2002 - Veldhoven, Netherlands
    Duration: 28 Nov 200229 Nov 2002
    Conference number: 13

    Publication series

    PublisherSTW Technology Foundation


    Workshop13th Workshop on Circuits, Systems and Signal Processing, ProRISC 2002


    • wide band
    • EWI-14414
    • METIS-207356
    • IR-67439
    • noise cancelling
    • Low-noise amplifier
    • LNA
    • noise cancellation
    • Broadband

    Cite this