Stereo demodulator system

Details Stereo demodulator system Stereo demodulator system

1977-09-13

1979-02-20

Olms, Douglas W.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

329 50, H04H 500

Patent

active

041408780

ABSTRACT:
A stereo demodulator system includes first and second differential amplifiers differentially responding to a first form of a stereo signal and at least a pair of differentially connected transistors serially connected to the output circuit of the first differential amplifier and responding to a second signal related to the first signal. A current mirror circuit is provided from the output circuit of the second differential amplifier to the pair of differentially connected transistors to produce a mixed output signal at the output terminal of the pair of transistors to separate the stereo signal into component signals. An offset current compensator is provided to avoid producing an offset current in the mixed output signal.

REFERENCES:
patent: 3573382 (1971-04-01), Feit
patent: 4049918 (1977-09-01), Ohsawa

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