Noise eliminator for television synchronizing signal separating

Details Noise eliminator for television synchronizing signal separating Noise eliminator for television synchronizing signal separating

1979-04-30

1981-03-03

Murray, Richard

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358153, 358154, H04N 508

Patent

active

042544351

ABSTRACT:
A circuit for reducing the effects of negative-going impulse noise in composite television video signals has on sync separators is disclosed. A variable output current source is used to supply rundown current to a dc restorer in a sync separator. A retriggerable monostable multivibrator is triggered by negative-going impulse spikes in the composite video signal. The output of this multivibrator is coupled to the current source to increase its output and therefore decrease the time required for the dc restorer to recover from the negative spike.

REFERENCES:
patent: 3873768 (1975-03-01), Klein
patent: 3903365 (1975-09-01), Arai
patent: 4040090 (1977-08-01), Haynes

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