Television horizontal AFPC with phase detector driven at twice t

Details Television horizontal AFPC with phase detector driven at twice t Television horizontal AFPC with phase detector driven at twice t

1979-05-09

1981-02-10

Griffin, Robert L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358155, 358158, H04N 504

Patent

active

042505259

ABSTRACT:
An AFPC loop for TV horizontal oscillator suitable for use with sync signals subject to timing instability includes means for maintaining a long response time during the equalizing and vertical sync intervals to reduce drift, and shortens the loop response time after the second equalizing pulse interval for maximum correction.

REFERENCES:
patent: 3688037 (1972-08-01), Ipri
patent: 3846584 (1974-11-01), Itoh
patent: 3906155 (1975-09-01), Van Straaten
patent: 3935388 (1976-01-01), Brinkmann
patent: 4093963 (1978-06-01), Uchida
patent: 4144544 (1979-03-01), Fernsler
patent: 4144545 (1979-03-01), Fernsler

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