Distortion cancel circuit in FM stereo

Details Distortion cancel circuit in FM stereo Distortion cancel circuit in FM stereo

1984-02-29

1986-03-18

Isen, Forester W.

Electrical audio signal processing systems and devices

Binaural and stereophonic

Broadcast or multiplex stereo

455305, 455312, H04H 500

Patent

active

045773424

ABSTRACT:
There is disclosed a distortion cancel circuit in FM stereo receiver, which circuit synthesizes a canceling signal mainly including the distortion component by performing the arithmetic operation for an FM demodulation signal and adjusts the level of this synthesized canceling signal and thereafter subtractively combining it with the FM demodulation signal. This circuit enables the elimination of harmonic distortion which appears in the stereo MPX signal output due to the band characteristic of an intermediate frequency amplifier.

REFERENCES:
patent: 4069398 (1978-01-01), Fujie
patent: 4246541 (1981-01-01), Ishigaki
patent: 4408352 (1983-10-01), Dudding

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