Television receiver with noise immune AFC circuit

Details Television receiver with noise immune AFC circuit Television receiver with noise immune AFC circuit

1974-07-24

1976-07-06

Griffin, Robert L.

Telegraphy

Systems

Simplex-reversing periodic

H04N 550

Patent

active

039683257

ABSTRACT:
Correction of the influence of noise on the output voltage of a detection circuit for automatic frequency control by using a product demodulator with a filter having a pole at the picture intermediate frequency and a zero crossing at a frequency between a sound intermediate frequency and the picture intermediate frequency.

REFERENCES:
patent: 3435345 (1969-03-01), Ashby
patent: 3459887 (1969-08-01), Baker
patent: 3469025 (1969-09-01), Evans
patent: 3673321 (1972-06-01), Janssen
patent: 3704420 (1972-11-01), Villard, Jr.

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