Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1988-05-31
1989-05-30
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
455340, 455197, H04N 550
Patent
active
048356085
ABSTRACT:
A varactor diode tuner includes a tunable image frequency trap in its input circuit. The trap is part of a tunable bandpass filter and forms a tapped capacitance matching network for UHF television signal carrier frequencies and a low impedance shunt at image frequencies. The trap is formed of discrete capacitors, an inductor and a tunable varactor diode.
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patent: 4399559 (1983-08-01), Theriault
patent: 4601062 (1986-07-01), Hettiger
patent: 4662001 (1987-04-01), Cruz et al.
patent: 4760535 (1988-07-01), Englmeier
patent: 4771332 (1988-09-01), Metoki
Lachiw Mark J.
Strammello Peter
Faris E. Anne
Groody James J.
Zenith Electronics Corporation
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