Apparatus for detecting groove end of record disk

Details Apparatus for detecting groove end of record disk Apparatus for detecting groove end of record disk

1980-09-04

1982-07-13

Shepperd, John W.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Mechanism responsive to control structure on storage medium...

G11B 1700

Patent

active

043398138

ABSTRACT:
A groove-end detecting apparatus of a record disk or video disk, arranged to have a pulse generator for generating a pulse of a short period when the movement speed of the pickup arm is great, and having a long period when this movement speed is low, i.e. a pulse having a period inversely proportional to the movement speed of the pickup arm. This pulse is provided as a set pulse to a counter circuit assigned for counting a certain frequency clock pulse so as to generate a groove-end detection signal when the cycle is within the time which is required for the counting of a predetermined value of the count of the clock pulse.

REFERENCES:
patent: 3599984 (1971-08-01), Kondo
patent: 3701534 (1972-10-01), Lane

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