Spindle servo utilizing a vertical sync mark

Details Spindle servo utilizing a vertical sync mark Spindle servo utilizing a vertical sync mark

1990-04-19

1992-06-09

Richardson, Robert L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358322, 358342, 369 4425, 369 4426, G11B 700

Patent

active

051212196

ABSTRACT:
In a disk recording/reproducing apparatus, phase control of a spindle servo system is made to be smaller than a range of time base control of a time base servo system, so as to obtain spindle servo phase jitter equivalent to that obtained using a horizontal synchronizing signal, which may not be available under all circumstances. Preferably, the range of phase control is no more than 1/10 of the range of variation of a variable delay line used to provide a time base reference signal.

REFERENCES:
patent: 4736238 (1988-04-01), Moriyama et al.
patent: 4789975 (1988-12-01), Taniyama

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