Stereo MPX circuit

Details Stereo MPX circuit Stereo MPX circuit

Filed on

1984-02-03

Date issued

1985-10-29

Examiner

Isen, Forester W.

Patent Class

Electrical audio signal processing systems and devices

SubClass

Binaural and stereophonic

SubSubClass

Broadcast or multiplex stereo

Other Related Categories

455 63, H04H 500

Type

Patent

Status

active

Patent number

045504237

Description

ABSTRACT:
A stereo multiplex circuit which can reduce a distortion of an FM demodulated signal to be generated due to nonlinearity of the frequency vs. amplitude/phase characteristics of a band-pass filter at an intermediate frequency amplifier stage of an FM receiver. This circuit includes a circuit for multiplying signals consisting of right-channel and left-channel signals and for adjusting the level of this multiplication signal into a suitable magnitude and thereafter inserting into the right and left channels, thereby causing a harmonic distortion to disappear.

REFERENCES:
patent: 4356350 (1982-10-01), Ienaka
patent: 4502148 (1985-02-01), Ishida et al.

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