On Dynamic Range Limitations of CMOS Current Conveyors

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    Abstract

    This paper is concerned with the dynamic range of continuous time CMOS current mode circuits. As a representative current mode device a class AB current conveyor is examined. First, the voltage input range of the high impedance Y input is investigated. Next, the current input range of the low impedance X input is investigated. It is compared to the thermal noise in the X to Z signal path in order to evaluate the dynamic range, and the dependencies of the dynamic range on the supply voltage and the transistor lay-out is derived, both for the situation where the conveyor is used over a narrow frequency band and for the situation where the conveyor is used over the full bandwidth achievable. Finally, the optimisation of the current input range is related to the distortion characteristics and it is pointed out that to a first order approximation the distortion is independent of the current range.
    Original languageEnglish
    Title of host publicationProc. IEEE International Symposium on Circuits and Systems, vol. 2
    Place of PublicationPiscataway
    PublisherIEEE
    Publication date1999
    Pages270-273
    ISBN (Print)0-7803-5471-0
    DOIs
    Publication statusPublished - 1999
    Event1999 IEEE International Symposium on Circuits and Systems - Orlando, FL, United States
    Duration: 30 May 19992 Jun 1999
    http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=6311

    Conference

    Conference1999 IEEE International Symposium on Circuits and Systems
    Country/TerritoryUnited States
    CityOrlando, FL
    Period30/05/199902/06/1999
    Internet address

    Bibliographical note

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