FM Stereo demodulator for demodulating stereo signals directly f

Details FM Stereo demodulator for demodulating stereo signals directly f FM Stereo demodulator for demodulating stereo signals directly f

1982-06-25

1985-02-26

Rubinson, Gene Z.

Electrical audio signal processing systems and devices

Binaural and stereophonic

Broadcast or multiplex stereo

381 13, 381 4, H04H 500

Patent

active

045021481

ABSTRACT:
Disclosed is an FM stereo demodulator in which components of the demodulated signal corresponding to odd harmonics of the subcarrier signal are eliminated.
In order to prevent the production of odd harmonics, the multiplication between positive and negative sinusoidal subcarrier signals is performed with a stereo pilot signal and positive and negative pulse train signals produced by pulse detection of an FM signal.
The multiplication signals are further added with each other to directly reproduce left and right stereophonic signals.

REFERENCES:
patent: 3514719 (1970-05-01), Rhodes
patent: 4069398 (1978-01-01), Fujie
patent: 4334125 (1982-06-01), Inoue
patent: 4362906 (1982-12-01), Ishida
patent: 4404430 (1983-09-01), Ogita

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