Digital signal reproducing circuit

摘要

A digital signal reproducing circuit which enables precise measurement of a phase difference and jitter components of reproduction signals while realizing miniaturization of the circuit is disclosed. The digital signal reproducing circuit has a phase comparator for detecting a phase difference by using sampled values before and after an edge portion of a reproduction signal from an optical disc outputted from an A/D converter, and a jitter measuring section for detecting a jitter detection signal on the basis of unevenness of the phase difference obtained by the phase comparator.