Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1979-07-31
1981-03-24
Murray, Richard
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
H04N 562
Patent
active
042583918
ABSTRACT:
In television reception, the sound intercarrier signal is detected by mixing the composite sound intermediate frequency signal, which is taken from an output of the video IF amplifier, with a clean, unmodulated signal, which is extracted from the oscillator output of the video synchronous detector and, accordingly, phase locked to the composite video intermediate frequency signal. Complementary amplifier stages, having highly selective tuned matching networks and traps, provide necessary gain and further purification of the respective signals before input to the intercarrier coincidence detector.
Murray Richard
Pay Television Corporation
Semmes J. Gibson
LandOfFree
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