Multivibrator synchronization system for video display

Details Multivibrator synchronization system for video display Multivibrator synchronization system for video display

1979-10-26

1981-02-24

Griffin, Robert L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

331145, H04N 504

Patent

active

042531179

ABSTRACT:
A system for increasing synchronization signal injection to a free-running multivibrator in the horizontal drive circuit of a video display which enhances synchronization signal frequency capture range is disclosed. A reduction in synchronization input signal amplitude due to an input signal voltage cutoff threshold which reduces spurious multivibrator inputs is compensated for by coupling the multivibrator synchronization input signal to the emitter and collector of both of the multivibrator's coupled transistors.

REFERENCES:
patent: 3569864 (1971-03-01), Scherrer
patent: 3611176 (1971-10-01), Christopher
patent: 4001715 (1977-01-01), Fukaya
patent: 4054847 (1977-10-01), Fukaya
patent: 4144544 (1979-03-01), Fernsler

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