Dual channel IF TV receiver with AFT derived from the picture ca

Details Dual channel IF TV receiver with AFT derived from the picture ca Dual channel IF TV receiver with AFT derived from the picture ca

1984-02-17

1986-07-08

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

455182, H04N 550, H04B 1116

Patent

active

045996520

ABSTRACT:
A quasi-parallel IF television receiver derives the AFT voltage from a video carrier in the sound IF channel. Since the signals in the sound IF channel do not pass through the VSB filter, asymmetries in the AFT loop response are avoided. This results in better operation of the AFT control loop.

REFERENCES:
patent: 2891105 (1959-06-01), Keizer

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