Patent ID: 6934229

Claim:
A phase correction circuit for a disk reproduction device, comprising: channel clock generation means for generating a channel clock whose phase synchronizes with that of record data, from a disk-type recording medium in which clock marks showing phase information are preformatted and the record data and a fixed pattern whose phase synchronizes with that of the record data are recorded in each sector, by using a reproduction signal of the clock marks; phase difference detection means for detecting a phase difference between a phase of a reproduction signal of the fixed pattern and the phase of the channel clock generated by the channel clock generating means; phase control data generation means for judging whether or not a present sector is a leading sector in a minimum recording unit in the disk-type recording medium, and generating phase control data by referring to a phase difference data of a previous sector when the present sector is not the leading sector, based on the phase difference data detected by the phase difference detection means; and phase control means for generating a sampling clock whose phase synchronizes with that of the record data, by controlling the phase of the channel clock based on an output of the phase control data generation means.