Vertical synchronizing signal detector for television video sign

Details Vertical synchronizing signal detector for television video sign Vertical synchronizing signal detector for television video sign

1977-10-26

1980-04-15

Safourek, Benedict V.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358152, 358153, 331 20, H04N 506, H04N 504, H04N 508, H03B 304

Patent

active

041986598

ABSTRACT:
A television video vertical sync detector which produces a vertical sync pulse. This detector includes a separating circuit for the production of horizontal sync pulses, equalizing pulses and vertical sync pulses, and a phase control oscillator. The phase control oscillator includes a phase comparator low pass filter, a voltage control oscillator for generating clock pulses, a division circuit and a delay circuit. A sampling circuit is used to generate the final vertical sync pulse.

REFERENCES:
patent: 3567860 (1971-03-01), Oliver et al.
patent: 3688037 (1972-08-01), Ipn
patent: 3814855 (1974-06-01), Kokado
patent: 3906155 (1975-09-01), van Straaten
patent: 3963865 (1976-06-01), Songer

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