Circuit for controlling separation and high-cut operation of a s

Details Circuit for controlling separation and high-cut operation of a s Circuit for controlling separation and high-cut operation of a s

1986-05-07

1987-12-01

Isen, Forester W.

Electrical audio signal processing systems and devices

Binaural and stereophonic

Broadcast or multiplex stereo

381 13, H04H 500

Patent

active

047109580

ABSTRACT:
A control circuit in an FM radio receiver includes a current mirror circuit which extracts a ripple component caused by a multipath disturbance and superposed on an S-meter output voltage from an intermediate frequency amplifier/detector of the FM radio receiver, and decreases the S-meter output voltage in response to the degree of the ripple component to use the decreased S-meter output voltage as a control voltage for control of separation and high-cut operations of a stereo demodulating stage of the FM radio receiver.

REFERENCES:
patent: 4157455 (1979-06-01), Okatani et al.
patent: 4416024 (1983-11-01), Ugari et al.
patent: 4466115 (1984-08-01), Hashimoto
patent: 4607381 (1986-08-01), Shimizu
patent: 4612662 (1986-09-01), Kuwajima et al.
patent: 4620315 (1986-10-01), Imagawa

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