AM-FM receiver

Details AM-FM receiver AM-FM receiver

1976-12-17

1979-04-03

Martin, John C.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

325458, 329 1, H04B 116

Patent

active

041479866

ABSTRACT:
An AM-FM receiver has switching elements such as field effect transistors inserted in a signal path of the FM circuit. A switch for applying bias voltage to the AM or FM front end circuit is arranged to operate synchronously with switching of the bias voltage to the switching elements. A time constant circuit comprising a series-connected resistor and a capacitor is inserted between the switch and the switching elements to delay application of the bias voltage to the switching elements only when the switch is thrown to bias the switching elements in order to suppress shock noises during AM-FM switching operation.

REFERENCES:
patent: 3875514 (1975-04-01), Klein
patent: 4050022 (1977-09-01), McFadyen
patent: 4070628 (1978-01-01), Funabashi

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