Spindle control device in optical disk recording/reproducing app

Details Spindle control device in optical disk recording/reproducing app Spindle control device in optical disk recording/reproducing app

1990-04-19

1992-02-18

Richardson, Robert L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

369 50, 358342, 360 7303, G11B 700

Patent

active

050899007

ABSTRACT:
In an optical disk recording/reproducing apparatus, a spindle control device in which a vertical synchronizing mark is detected so as to generate a synchronizing mark detection signal. A time base reference signal is generated at the same time, that signal being delayed by a variable delay circuit so as to perform phase control on a spindle motor for rotating the optical disk in accordance with a phase difference of the synchronizing mark detection signal from the delayed time base reference signal. Accordingly, it is easy to adjust, electrically, the relative position on the time base between the vertical synchronizing mark detection timing and a composite video signal to be recorded, by adjusting suitably the amount of delay of the variable delay circuit, without having to adjust the vertical synchronizing mark detector positionally.

REFERENCES:
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patent: 4603412 (1986-07-01), Yamazaki
patent: 4638375 (1987-01-01), Motoyama
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patent: 4819221 (1989-04-01), Overath et al.
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patent: 4845571 (1989-07-01), Hirano et al.
patent: 4862291 (1989-08-01), Nakajima et al.
patent: 4885644 (1989-12-01), Ishii et al.

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