Telecommunications – Receiver or analog modulated signal frequency converter – With wave collector
Patent
1997-12-29
2000-01-04
Urban, Edward F.
Telecommunications
Receiver or analog modulated signal frequency converter
With wave collector
455293, 455338, H04B 116
Patent
active
060119659
ABSTRACT:
In a receiver, a tunable parallel resonant circuit (PRC2) is coupled to an input (IN) of a transistor circuit (MOIC) via a coupling network (CNW). The coupling network (CNW) lacks a varicap diode but includes a coupling resistor (Rc) in series with a coupling capacitor (Cc). The coupling capacitor has a coupling capacitance which is within an order of magnitude of an input capacitance at the input of the transistor circuit and the impedances of the coupling capacitor and the coupling resistor are substantially equal at a lower end of a frequency range throughout which the tunable parallel resonant circuit is tunable
REFERENCES:
patent: 3519737 (1970-07-01), Marsh, Jr.
patent: 3646449 (1972-02-01), Hellbarth et al.
patent: 3947629 (1976-03-01), Tanaka et al.
patent: 3991373 (1976-11-01), Maurer et al.
patent: 4288875 (1981-09-01), Carter
patent: 4297643 (1981-10-01), Pearson, Jr.
patent: 4403347 (1983-09-01), Iso et al.
patent: 4667342 (1987-05-01), Lindenmeier et al.
Lau Hwee H.
Lee Sok Y.
Lim Kui Y.
Goodman Edward W.
U.S. Philips Corporation
Urban Edward F.
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