Substrate Bounce in Mixed-Mode CMOS ICs

  • Bram Nauta
  • Gian Hoogzaad

Abstract

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.

Keywords

Analog Circuit Differential Pair NMOS Transistor Digital Part Substrate Noise 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. [1]
    H.J.M. Veendrick, “Short-Circuit Dissipation of Static CMOS Circuitry and its Impact on the Design of Buffer Circuits”, IEEE Journal of Solid-State Circuits, Vol. SC-19, August 1984, pp 468–473.CrossRefGoogle Scholar
  2. [2]
    D.W.J. Groeneveld, “Groundbounce in CMOS”, Digest of technical papers, workshop on Advances in Analog Circuit design, Leuven 1993.Google Scholar
  3. [3]
    T. J. Schmerbeck, R.A. Richetta and L.D. Smith, “A 27MHz Mixed Analog/Digital Magnetic Recording DSP Using Partial Response Signalling with Maximum Likelihood Detection”, Digest of technical papers, ISSCC 1991, Feb 1991, pp 136-137.Google Scholar
  4. [4]
    D.K. Su, M. J. Loinaz, S. Masui, B.A. Wooley, “Experimental Results and Modeling Techniques for Substrate Noise in Mixed-Signal Integrated Circuits”, IEEE Journal of Solid-State Circuits, Vol. 28, No. 4, April 1993, pp 420–430.CrossRefGoogle Scholar
  5. [5]
    K.E. Kuijk, “A reference voltage source” IEEE Journal of Solid-State Circuits, vol SC-8, pp 222–226, June 1973.CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 1999

Authors and Affiliations

  • Bram Nauta
    • 1
    • 2
  • Gian Hoogzaad
    • 1
  1. 1.Philips Research LaboratoriesEindhovenThe Netherlands
  2. 2.University of TwenteEnschedeThe Netherlands

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