Self-calibrating analog-to-digital converter

摘要

A user transparent self-calibration technique for an analog to digital converter is described. The technique can correct for capacitor mismatch error with minimal additional power consumption. This is done by generating a calibration signal VCAL, one for each capacitor CCAL whose calibration is desired. The signal is interleaved with the input signal VIN, and digitized by alternating with the input signal digitization using capacitor arrays. <IMAGE>