An analogue self-calibration technique for high-resolution video-rate pipelined A/D converters

An analogue self-calibration technique employing a high-linearity pulse-counting reference DAC for code-by-code correction is proposed for calibrating both the MDAC nonlinearities and the interstage-gain errors in high-resolution video-rate pipelined analogue-to-digital converters. When compared with alternative code-by-code calibration techniques, the proposed solution has the advantage of correcting also the residue-amplification gain of the calibrated stages while using similar additional resources. An example is presented which reveals the effectiveness of such solution