A simplified frequency-interleaved ADC with integrated mismatch compensation

Abstract

A simplified frequency-interleaved framework with digital back-end correction is presented for wideband analog-to-digital converters. Instead of channel-by-channel signal recovery, an iterative structure is proposed to simultaneously compensate the mismatches including in-phase/quadrature (I/Q) imbalances, jitter-induced distortions, as well as overlapping effects due to imperfect channel separation and incomplete anti-aliasing. The effectiveness of this novel architecture is validated via extensive simulations.