Circuit for preventing the interference of TV channel 6 broadcas

Details Circuit for preventing the interference of TV channel 6 broadcas Circuit for preventing the interference of TV channel 6 broadcas

1990-09-10

1992-06-30

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358196, 455307, 455286, H04N 544

Patent

active

051268485

ABSTRACT:
A circuit prevents the interference of FM radio broadcasting with TV channel 6 broadcast. The circuit comprises a microprocessor for receiving channel selecting data output from a data input device and outputting phase locked loop (PLL) data. A control signal generating device receives the PLL data and generates a control signal to control an FM trap operation. A trap operation controlling device then controls the operation of an FM trap according to the control signal. According to the present invention, TV channel 6 broadcasting can be received without noise.

REFERENCES:
patent: 3647950 (1972-03-01), Yoshikawa
patent: 4031549 (1977-06-01), Rast et al.
patent: 4276566 (1981-06-01), Parker
patent: 4287602 (1981-09-01), Kessler
patent: 4361909 (1980-11-01), Theriault

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