Stereo inhibit circuit

Details Stereo inhibit circuit Stereo inhibit circuit

1975-10-31

1976-12-21

Griffin, Robert L.

325 36, 325348, 325478, 179 15BT, H04B 106

Patent

active

039991326

ABSTRACT:
A stereo inhibit circuit adaptable for use in an FM stereo radio having a stereo indicating light is disclosed. A level detector and a mute circuit develop a mute signal which is related to the amount of signal noise at the output of an FM detector. This mute signal is used to inhibit a stereo switch that controls the stereo indicating light while permitting the creation of audible signals by a stereo demodulator and a pair of speakers. Thus the stereo inhibit circuit permits the creation of an audible hiss and positively prevents any flickering of the stereo indicating light when the FM radio is not tuned to a station.

REFERENCES:
patent: 3125640 (1964-03-01), Von Recklinghausen
patent: 3264414 (1966-08-01), Santilli
patent: 3569633 (1971-03-01), Brahman
patent: 3790714 (1974-02-01), Ohsawa
patent: 3919482 (1975-11-01), Hamada

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