Electronic tuning receiver

Details Electronic tuning receiver Electronic tuning receiver

1987-07-09

1988-12-27

Gensler, Paul

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

331177V, 334 15, 455195, H04B 126

Patent

active

047946504

ABSTRACT:
A receiver equipped with an electronic tuning circuit which uses voltage-variable reactance elements such as variable-capacitance diodes or the like in the radio-frequency tuning circuit and oscillation tuning circuit thereof. The oscillation tuning circuit includes a novel padding capacitor constituted by a composite circuit of a variable-capacitance diode and fixed capacitors connected at the position where a conventional padding capacitor is connected. With such an arrangement, it is possible to make tracking error negligibly small over a frequency band ranging from a low receiving frequency to a high receiving frequency, by applying a tuning voltage to the composite padding capacitor.

REFERENCES:
patent: 3249876 (1966-05-01), Harrison
patent: 3784917 (1974-01-01), Kenyon
patent: 4450416 (1984-05-01), Mears
patent: 4628540 (1986-12-01), Hendriks
patent: 4658437 (1987-04-01), Ersoz et al.

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