AM Stereophonic demodulator circuit for amplitude/angle modulati

Details AM Stereophonic demodulator circuit for amplitude/angle modulati AM Stereophonic demodulator circuit for amplitude/angle modulati

1980-02-01

1982-09-14

Olms, Douglas W.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

329135, 329167, H04H 500, H03D 300

Patent

active

043496962

ABSTRACT:
An AM stereophonic demodulator circuit for an amplitude/angle modulation system, comprising an AM detector circuit for producing a stereophonic sum signal (L+R), an FM or PM detector circuit for producing a stereophonic difference signal (L-R), and control means for extracting a DC voltage proportional to an antenna input level from the AM detector circuit so as to use the DC voltage to control the gain and amplitude of an FM or PM detector stage including the FM or PM detector circuit.

REFERENCES:
patent: 3061683 (1962-10-01), Freedman et al.
patent: 3128345 (1964-04-01), Freedman et al.
patent: 3167614 (1965-01-01), Holt et al.
patent: 3178514 (1965-04-01), Holt
patent: 4122394 (1978-10-01), Fukushima et al.

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