Rotation control device for information recording disc

Details Rotation control device for information recording disc Rotation control device for information recording disc

1983-10-12

1985-09-17

Stellar, George G.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

G11B 1924

Patent

active

045424233

ABSTRACT:
A rotation control device causes a disc on which information and sync signals are recorded to rotate at a predetermined speed. The control device includes a generator for generating a signal whose frequency is identical with that of a rotation signal which will be output from a frequency generator while the disc rotates at the predetermined speed. A control loop is defined which compares a phase of an output of the signal generator and a rotation signal output from the frequency generator, thereby controlling the drive of the motor.

REFERENCES:
patent: 3174090 (1965-03-01), Hall
patent: 3503058 (1970-03-01), Ault et al.
patent: 3526726 (1970-09-01), Corbett et al.
patent: 4003090 (1977-01-01), Beck
patent: 4338683 (1982-07-01), Furukawa et al.

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