Radio receiver audio attenuator

Details Radio receiver audio attenuator Radio receiver audio attenuator

1978-09-22

1980-04-15

Bookbinder, Marc E.

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

179 1VL, 455253, H04B 116

Patent

active

041986032

ABSTRACT:
A radio receiver includes apparatus for attenuating the audio signal derived from weak and noisy radio frequency signals to render the resulting noisy output audio signals less objectionable. Apparatus is provided to attenuate the AGC audio frequency signal in a predetermined constant attenuation, linearly mix the AGC regulated and attenuated audio frequency signals in a proportion controlled by an attenuation control signal and generate the attenuation control signal from the difference between the radio AGC signal and a predetermined constant reference.

REFERENCES:
patent: 2831969 (1958-04-01), Jankowski
patent: 3323066 (1967-05-01), Kurtz
patent: 3495247 (1970-02-01), Perkins
patent: 3496481 (1970-02-01), Torick et al.
patent: 3769592 (1973-10-01), Espe
patent: 3824345 (1974-07-01), Cowpland
patent: 3849601 (1974-11-01), Goncharoff

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