The phase comparator, and the clock generation circuit, the graphic display device and the regenerative signal processor null which use

摘要

Doing the filter processing which for example does weight attaching addition with the FIR filter of the plural taps from present time from of phase error calculation section 33 vis-a-vis the phase error series before, feeding back revising the reference level which lightens the influence of the noise which is mixed in that phase error series it forms filter processing section 34, regenerative signal the clock which same period is done is formed in the synchronous type regenerative signal processor, detecting the phase error of the playback data and the clock over again on the basis of that phase error at the time of. Cross sensing station 32 detects the timing which crosses the reference level where the playback data which is sampled is formed in the aforementioned filter processing section 34. Therefore, that without restricting the dynamic range of the reference level which is fed back as it can utilize effectively, strengthening the noise tolerance is assured simultaneously.