Substrate Bounce in Mixed-Mode CMOS ICs

Bram Nauta, Gian Hoogzaad

    Research output: Chapter in Book/Report/Conference proceedingChapterAcademic

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    Substrate noise is one of the key problems in mixed analog/digital ICs. Although measures are known to reduce substrate noise, the noise will never be completely eliminated since this requires larger chip area and thus higher cost. Analog circuits on digital ICs simply have to be resistant to substrate noise. A general strategy is given which can be summarized as: the supply of the analog circuits must be referred to the substrate and the analog signals must be referred to a clean analog ground. Furthermore several design constraints are given to minimize the effect of substrate noise on analog. Two band-gap circuits are discussed and it is shown that apparently minor design issues, such as the connection of an n-well of a PMOS differential pair, can have large impact on the substrate sensitivity of this circuit. This has been verified by measurements.
    Original languageEnglish
    Title of host publicationAnalog Circuit Design
    Subtitle of host publicationVolt Electronics; Mixed-Mode Systems; Low-Noise and RF Power Amplifiers for Telecommunication
    EditorsJohan Huijsing, Rudy van de Plassche
    Place of PublicationBoston
    PublisherKluwer Academic Publishers
    Number of pages15
    ISBN (Electronic)978-1-4757-2983-2
    ISBN (Print)978-0-7923-8400-7, 978-1-4419-5071-0
    Publication statusPublished - 1999
    Event7th Workshop on Advances in Analog Circuit Design, AACD 1998 - Copenhagen, Denmark
    Duration: 28 Apr 199830 Apr 1998
    Conference number: 7


    Conference7th Workshop on Advances in Analog Circuit Design, AACD 1998
    Abbreviated titleAACD

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