Stereo signal demodulating circuits

Details Stereo signal demodulating circuits Stereo signal demodulating circuits

1978-01-27

1979-09-11

Olms, Douglas W.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

329 50, H04H 500

Patent

active

041676505

ABSTRACT:
A stereo signal demodulating circuit of a switching type is provided with a differential amplifier to obtain difference signals between two output signals from the switching circuit. The difference signals from the differential amplifier are added to the stereo composite signal to obtain the left (L) and right (R) audio signals. The beats between the harmonics of the switching signal and the sub-channel signal are removed at the differential amplifier without the use of SCA filter.
Two operational amplifiers may be used in place of the differential amplifier.

REFERENCES:
patent: 3346699 (1967-10-01), Csicsatka
patent: 4074075 (1978-02-01), Ohsawa

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