Velocity correction circuit for video discs

Details Velocity correction circuit for video discs Velocity correction circuit for video discs

1974-11-12

1976-06-22

Griffin, Robert L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

178 66P, H04N 576, H04N 580

Patent

active

039654826

ABSTRACT:
Velocity and phase errors in signals derived from a rotating video disc are minimized with the use of a voltage controlled oscillator and an electromechanical transducer. A control circuit employing an active and a passive filter maintains an appropriate frequency response to the voltage controlled oscillator and electromechanical transducer in order to appropriately share a single controlling error signal.

REFERENCES:
patent: 3711641 (1973-01-01), Palmer
patent: 3871020 (1975-03-01), Wilber

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