Noise muting circuit in FM receiver

Details Noise muting circuit in FM receiver Noise muting circuit in FM receiver

1977-06-07

1979-03-27

Griffin, Robert L.

325456, 325478, H04B 110

Patent

active

041468422

ABSTRACT:
In an FM receiver having an amplifier for amplifying an FM signal of intermediate frequency applied to an input terminal, and a phase multiplier type FM demodulator for demodulating the FM signal of intermediate frequency amplified by the amplifier, a noise muting circuit is disposed between the demodulator and the amplifier for muting noise transmitted from the amplifier to the demodulator when no FM signal input appears at the input terminal. This noise muting circuit comprises a pair of diodes connected in inverse-parallel with each other.

REFERENCES:
patent: 2512637 (1950-06-01), Frazier
patent: 2961532 (1960-11-01), Rowley
patent: 3181069 (1965-04-01), Loughlin
patent: 3534268 (1970-10-01), Mazziota et al.
patent: 3699457 (1972-10-01), Wright
patent: 3866125 (1975-02-01), Kilian

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