FM stereo demodulator

Details FM stereo demodulator FM stereo demodulator

1982-06-25

1985-01-29

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

044970633

ABSTRACT:
An FM stereo demodulator having improved separation and distortion characteristics comprising a high-frequency pulse signal which is modulated by a sinusoidal subcarrier signal produced in accordance with a stereo pilot signal. The high-frequency pulse signal is multiplied with a composite signal at a multiplier so as to reproduce left and right signals without frequency components of noise. Constructed accordingly, the invention advantageously obviates the use of a low-pass filter which injects delay characteristics and reduces gain of the composite signal from an FM demodulator.

REFERENCES:
patent: 3175155 (1965-03-01), Holder
patent: 4149161 (1980-03-01), Hershberger
patent: 4160217 (1980-07-01), Ohsawa
patent: 4288752 (1981-09-01), Ogawa
patent: 4362906 (1982-12-01), Ishida

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