CALIBRATION OF IMPAIRMENTS IN A MULTICHANNEL TIME-INTERLEAVED ADC FOR PERFORMING ERROR ESTIMATION AND CORRECTION PROCESSES

摘要

PURPOSE: The calibration of impairments in a multichannel time-interleaved ADC is provided to correct offset, gain and/or, sample timing or phase mismatch errors by using an M-channel time interleaved analog-digital system.;CONSTITUTION: Each main ADC(Analog to Digital Converter)(102-1-102-M) operates at a Fs/M sampling rate. The main ADC is clocked in a proper phase. A clocking operation is controlled by a distributor(104) cycling an input signal through all ADCs. A commutator(108) operates at a sample rate. The commutator performs the opposite function of the distributor. Correction values are forwarded to ADCs through a set of DACs(digital to analog connector)(112).;COPYRIGHT KIPO 2012