Television AFC system usable with offset carrier frequencies

Details Television AFC system usable with offset carrier frequencies Television AFC system usable with offset carrier frequencies

1983-06-20

1985-10-15

Martin, John C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

H04N 550

Patent

active

045478058

ABSTRACT:
An AFC circuit for a television receiver capable of unambiguous operation with substantially offset signal frequencies has a response characteristic defined by a positive portion intermediate a pair of substantially equally sized negative portions. The circuit includes a multiplier with an unbalanced coupling between the limiter and the discriminator which has a single adjustable tuned circuit nominally tuned to 45.75 MHz.

REFERENCES:
patent: 3796824 (1974-03-01), Baker
patent: 4091421 (1978-05-01), Long

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