MPX Stereophonic demodulation

Details MPX Stereophonic demodulation MPX Stereophonic demodulation

1979-07-02

1981-06-16

Moore, David K.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

179 1G, 329103, 329101, 329 50, G01P 348, G01P 354

Patent

active

042740576

ABSTRACT:
An MPX stereophonic demodulation switching circuit having first and second identical switching circuits adapted to transmit a composite input signal to respective output terminals. First and second switching elements are connected respectively between the junction points of resistors in first and second transmission paths in each switching circuit, and a reference voltage line. A voltage follower circuit is provided to produce a reference voltage. Groups of resistors are connected in parallel between the output terminal of the voltage follower and one respective output terminal. Third and fourth switching elements are connected respectively between the connection points of the resistors in each group of resistors and the reference voltage line in each switching circuit. Opposite pairs of switching elements in the two switching circuits are controlled to be alternately rendered conductive and non-conductive.

REFERENCES:
patent: 3569633 (1971-03-01), Braham
patent: 3707603 (1972-12-01), Limberg

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