Background interstage gain calibration technique for pipelined ADCs

A background self-calibration technique is proposed that can correct both linear and nonlinear errors in the interstage amplifiers of pipeline and algorithmic analog-to-digital converters (ADCs). Stage redundancy in a pipeline architecture is exploited to measure gain errors that are corrected using digital post-processing. The proposed technique allows faster convergence and has less dependence on input signal statistics than a similar...