Videodisc player with constant turntable velocity

Details Videodisc player with constant turntable velocity Videodisc player with constant turntable velocity

1980-11-06

1982-07-06

Konick, Bernard

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369240, 369189, 360 73, G11B 1700

Patent

active

043386830

ABSTRACT:
In a disc record reproducing apparatus for reproducing a disc on which a PCM (pulse code modulation) signal in the form of an RLLC (run length limited code) is recorded, a reproduced PCM signal therefrom is frequency-divided at a constant frequency dividing ratio, a frequency-divided PCM signal is compared with a reference frequency signal, and then the rotation of the disc record is controlled by a compared output.

REFERENCES:
patent: 3564434 (1971-02-01), Comenyind
patent: 3646259 (1972-02-01), Schuller
patent: 3939302 (1976-02-01), Kihara
patent: 4022986 (1977-05-01), Leer
patent: 4223349 (1980-09-01), Dakin
patent: 4236050 (1980-11-01), Winslow

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