ESTIMATION OF DAC WEIGHTING CAPACITORS MISMATCH IN PIPELINED ADCs EMPLOYING FINITE GAIN OP-AMPs

• Abstract:

  A D/A subconverter (DASC) error correction scheme based on weighting capacitor rotation is adapted to account for finite op-amp gain. Simulations show that reasonable estimates of capacitor mismatch can be obtained even if the actual gain is replaced by a nominal gain differing by as much as a factor of two.
  DASC capacitor mismatch might therefore be estimated in the foreground at power-up, and most part of the correspondingmismatch noise and mismatch-induced interstage gain error might be cancelled, possibly delegating to a background calibration the task of correcting the remaining interstage gain error, induced by finite op-amp gain and drift with temperature.
• Download:

  IMEKO-IWADC-2011-16.pdf
• DOI:

  _unreg_iwadc-2011.16

Event details:

• IMEKO TC:

  TC4
• Event name:

  IWADC 2011
• Title:

  16th IMEKO International Workshop on ADC Modeling and Testing - Data Converter Design, Modeling and Testing (together with IEEE ADC Forum) (IWADC)

• Place:

  Orvieto, ITALY
• Time:

  30 June 2011 - 1 July 2011