Horizontal synchronizing system

Details Horizontal synchronizing system Horizontal synchronizing system

1978-10-06

1980-09-09

Murray, Richard

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358148, 358150, 358158, H04N 504

Patent

active

042220742

ABSTRACT:
A horizontal synchronizing signal from a reference source is sampled at the vertical rate by a first sampling gate controlled by a vertical rate signal from a reference source. A signal related to the output of a horizontal frequency synchronizing pulse generator is sampled at the vertical rate by a second sampling gate controlled by the vertical rate signal. The output of each sampling gate is fed to an input of a phase detector which develops an error signal indicative of the phase relationship between the two sampled signals. The error signal is utilized to control the phase of the generated horizontal synchronizing pulse.

REFERENCES:
patent: 3311702 (1967-03-01), Legler
patent: 3336440 (1967-08-01), Blake et al.
patent: 3413414 (1968-11-01), Baldwin et al.
patent: 3420951 (1969-01-01), Gunther
patent: 3429994 (1969-02-01), Pay et al.
patent: 3655913 (1972-04-01), Schneider
patent: 3790710 (1974-02-01), Gaucheron
patent: 4038683 (1977-07-01), Thorpe et al.
patent: 4144545 (1979-03-01), Fernsler et al.

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