Apparatus for reproducing disc record

Details Apparatus for reproducing disc record Apparatus for reproducing disc record

1981-09-21

1983-08-02

Stephan, Steven L.

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 59, 369240, 369267, G11B 702, G11B 1700

Patent

active

043970117

ABSTRACT:
An apparatus for reproducing a disc record on which a PCM signal is recorded in run length limited code includes an input terminal for receiving a reproduced signal from the disc record; a detecting circuit for detecting the maximum or minimum transition interval contained in the reproduced signal and for producing a detecting signal in response thereto, and a comparing circuit for comparing the detecting signal with a reference signal corresponding to the maximum or minimum transition interval during the rotation of the disc record at a predetermined velocity, and for producing a control signal in response to said comparisons to be supplied to a servo circuit for controlling the rotation of the disc record.

REFERENCES:
patent: 3939302 (1976-02-01), Kihara
patent: 4223349 (1980-09-01), Dakin et al.
patent: 4338683 (1982-07-01), Furukawa et al.

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