Demodulator having two phase shift networks for wide band televi

Details Demodulator having two phase shift networks for wide band televi Demodulator having two phase shift networks for wide band televi

1983-01-13

1985-05-21

Martin, John C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358144, 329137, H04N 560, H04N 704

Patent

active

045189978

ABSTRACT:
A television receiver includes an integrated circuit audio system suitable for stereo sound, and a source of angle-modulation audio waves supplied from a limiter/integrator to a differential amplifier detector. A series parallel arrangement of elements in a first phase shift network has the parallel connected elements coupled across the inputs of the differential amplifier detector. A second phase shift network, coupled directly across the limiter/integrator output, loads the first phase shift network and linearizes the audio system output over a large signal deviation. The output of the differential amplifier detector supplies the detected audio output.

REFERENCES:
patent: 3519944 (1970-07-01), Avins
patent: 4359694 (1982-11-01), Suenaga
Television For Radiomen, by Edward M. Noll, The McMillan Company, (1955), pp. 319-324, TK 6630 N6.

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