Television receiver with synchronous detection and automatic fin

Details Television receiver with synchronous detection and automatic fin Television receiver with synchronous detection and automatic fin

1977-09-15

1979-05-22

Richardson, Robert L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

325420, H04N 550

Patent

active

041562550

ABSTRACT:
A television receiver has an automatic fine tuning circuit with a first phase-locked loop including a first low pass filter and a synchronous video detector with a second phase-locked loop including a second low pass filter. The cut off frequency of the first low pass filter is selected lower than the cut-off frequency of the second low pass filter, thereby enabling a stable operation of two phase-locked loops simultaneously.

REFERENCES:
patent: 3946148 (1976-03-01), Skerlos

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