Video camera synchronizing circuit

Details Video camera synchronizing circuit Video camera synchronizing circuit

1991-04-11

1992-11-24

Kostak, Victor R.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358148, H04N 504

Patent

active

051667932

ABSTRACT:
A signal processing circuit for a video camera includes: a voltage controlled oscillator for controlling an oscillation frequency in accordance with a control signal, a synchronism generation circuit for generating a synchronizing pulse signal in accordance with an output signal of the voltage controlled oscillator, and a phase comparison circuit for comparing the phase of the synchronizing pulse signal being output from the synchronism generation circuit with a signal corresponding to the phase of an AC utility power source. The voltage controlled oscillator is controlled by the output signal of the phase comparison circuit, and in turn controls the synchronism in accordance with the phase of the AC utility power.

REFERENCES:
patent: 4561021 (1985-12-01), Abe
patent: 4763193 (1988-08-01), DeVilbiss
patent: 4766491 (1988-08-01), Saitoh et al.
patent: 4860101 (1989-08-01), Pshtissky et al.
patent: 4897723 (1990-01-01), Arai
patent: 5001564 (1991-03-01), Randall

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