ESTIMATION OF DAC WEIGHTING CAPACITORS MISMATCH IN PIPELINED ADCs EMPLOYING FINITE GAIN OP-AMPs |
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| Matteo Tonelli, Giovanni Chiorboli, Carlo Morandi |
- 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:
- -
- 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 - 01 July 2011