Apparatus for maintaining rotational speed in disk reproducing d

Details Apparatus for maintaining rotational speed in disk reproducing d Apparatus for maintaining rotational speed in disk reproducing d

1981-11-13

1983-06-28

Konick, Bernard

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 45, 358336, 358338, 358342, G11B 2722, G11B 700

Patent

active

043909779

ABSTRACT:
In a disc reading device wherein the rotating speed is normally controlled by detecting the synchronizing signal part of a reproduced signal, a second speed control circuit is included for measuring the speed of the disc and controlling the speed to a desired value independently of the detected synchronizing signals. When signal drop-out or the like occurs, the second speed control circuit takes over.

REFERENCES:
patent: 4190860 (1980-02-01), Somers et al.
patent: 4223349 (1980-09-01), Dakin et al.
patent: 4228326 (1980-10-01), Dakin et al.
patent: 4236050 (1980-11-01), Winslow et al.
patent: 4239942 (1980-12-01), Van Alem et al.

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