Synchronizing signal separating circuit for television video sig

Details Synchronizing signal separating circuit for television video sig Synchronizing signal separating circuit for television video sig

1976-02-13

1978-03-28

Richardson, Robert L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358172, H04N 508

Patent

active

040818330

ABSTRACT:
A synchronizing pulse separating circuit provides synchronizing pulser from an incoming composite television signal wave including such a wave formed of switched plural individual television signals of differing array D.C. level. The pulse separating circuit employs keyed clamping circuitry to clamp the peak synchronizing levels of the incoming wave to a reference level, and clipping circuitry directly coupled to the clamping circuitry to provide output synchronizing pulses responsive to the clamped incoming, such pulses. The output synchronizing pulse train is also employed to key on the clamp circuit.

REFERENCES:
patent: 2828356 (1958-03-01), Macovski
patent: 3569844 (1968-03-01), Lynn
patent: 3881055 (1975-04-01), Gerot
RCA Technical Note, No. 709, June 1967.

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