Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
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.
Martin John C.
Parker Michael D.
Zenith Radio Corporation
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