Phase comparator, PLL circuit, information playback processor, optical disk reproducing arrangement and disk reproducing arrangement

摘要

As for zero cross sensing stations 701, from the playback data, you stand up in the phase comparator which is used for the synchronous clock extraction circuit which extracts the clock which same period is done in the playback data, you output with the cross detection signal and the fall cross detection signal and three phase error candidacy which are three sample data which are continued. As for startup and fall reference level retention section 703 and 704 you stand up and output reference level and fall reference level. As for phase error calculation section 702, the description above you stand up and or fall and when receiving the cross detection signal, among and the description above three sample data which include zero cross sample data you stand up and or fall and absolute difference of reference level outputs the smallest sample data as phase error. As for this phase error, the startup of the next phase error calculation time or you fall and the description above you stand up as a reference level and or fall and are kept in reference level retention section 703 and 704. Therefore, wide kiyapuchiyarenji is actualized.