FM Noise reducing circuit

Details FM Noise reducing circuit FM Noise reducing circuit

1981-07-30

1984-01-17

Pellinen, A. D.

Electrical audio signal processing systems and devices

Binaural and stereophonic

Broadcast or multiplex stereo

455135, 455296, H04B 110, H04H 500

Patent

active

044267274

ABSTRACT:
An FM noise reducing circuit which comprises an operational amplifier for comparing intermediate frequency signal levels and multipath signal levels, and a multiplexer controlled by output signals from the operational amplifier is arranged to carry out attenuation of high frequency components as well as blending of outputs from right and left channels in response to the output signals of the operational amplifier.

REFERENCES:
patent: 3568078 (1971-03-01), Pelchat
patent: 4135159 (1979-01-01), Kubanoff
patent: 4166251 (1979-08-01), Ishigaki et al.
patent: 4211979 (1980-07-01), Muraoka et al.
patent: 4266296 (1981-05-01), Ishigaki
patent: 4326294 (1982-04-01), Okamoto et al.
patent: 4379207 (1983-04-01), Kubota

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