Shock muting circuit for use in an AM receiver

Details Shock muting circuit for use in an AM receiver Shock muting circuit for use in an AM receiver

1977-08-08

1979-05-08

Griffin, Robert L.

325480, 325493, H04B 110

Patent

active

041538790

ABSTRACT:
A switch-off shock muting circuit for use in an AM receiver comprising a muting element disposed in a signal transmission path extending from the antenna through the demodulation and low frequency amplifying sections to the speaker of the receiver, a power switch and control switching means interlocked with the power switch, the control switching means being operated at an earlier time than the turning off of the power switch to thereby control the muting element, whereby spark noise caused by the power switch is prevented by controlling the muting element from the control switching means to thereby interrupt the signal transmission line earlier than the turning off of the power switch.

REFERENCES:
patent: 2269300 (1942-01-01), Andrews
patent: 3916321 (1975-10-01), Morse
patent: 4006307 (1977-02-01), Danielsen et al.

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