Analog Integrated Circuits and Signal Processing

, Volume 74, Issue 2, pp 461–465 | Cite as

Stochastic ADC with random U-quadratic distributed reference voltages to uniformly distribute comparators trip point

Mixed Signal Letter

Abstract

Stochastic ADC with uniformly distributed comparators trip point is presented. A basic comparator will have an offset that follows Gaussian distribution. When the comparator offset is used as the trip points for stochastic ADC, only 68 % of the comparators will be in the useful input range. By adding voltages that follow random U-quadratic distribution to the comparators’ reference inputs, their trip points will shape into uniform distribution, and 80 % of them will lie within the useful input range. That will not only increase the resolution of stochastic ADC but also its input dynamic range.

Keywords

U-quadratic distribution Uniform distribution Gaussian distribution Comparator offset voltage 

References

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Copyright information

© Springer Science+Business Media New York 2012

Authors and Affiliations

  • Mithun Ceekala
    • 1
  • Kamal El-Sankary
    • 1
  • Ezz El-Masry
    • 1
  1. 1.Microelectronics Research Laboratory, Department of Electrical and Computer EngineeringDalhousie UniversityHalifaxCanada

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