Radio receiver having automatic broadcasting-station selecting f

Details Radio receiver having automatic broadcasting-station selecting f Radio receiver having automatic broadcasting-station selecting f

1996-11-25

2000-09-19

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

4551932, H04B 100

Patent

active

061224936

ABSTRACT:
The capacitance value of a variable capacitance element of an RF tuning circuit is controlled in accordance with a control signal Vx. When an automatic search start signal is supplied to a frequency control circuit, frequencies of the local oscillation signal are changed and received frequencies are changed. A storage circuit stores the control data for each predetermined frequency corresponding to the frequency characteristic of the tuning element. When local oscillation frequencies are changed in accordance with an automatic search start signal, an arithmetic circuit computes a control signal Vx in accordance with the data corresponding to the changed received frequency and the control data and thereby, the variable capacitance element is controlled in accordance with the control signal Vx and tuning frequencies are changed so that a tuning frequency coincides with a received frequency. Under the above state, when the electric-field intensity of a received signal reaches a certain level or higher, the frequency control circuit stops the change of frequencies of a local oscillation signal and stops automatic broadcasting-station selection.

REFERENCES:
patent: 3247365 (1966-04-01), Dell et al.
patent: 3412240 (1968-11-01), Hunt et al.
patent: 3748447 (1973-07-01), Hajicek et al.
patent: 4048570 (1977-09-01), Sumi
patent: 4955073 (1990-09-01), Sugayama
patent: 5175701 (1992-12-01), Newman et al.
patent: 5203031 (1993-04-01), Sugayama
patent: 5212817 (1993-05-01), Atkinson
patent: 5239701 (1993-08-01), Ishii
patent: 5280641 (1994-01-01), Ishii et al.
patent: 5280643 (1994-01-01), Ishii
patent: 5321851 (1994-06-01), Sugayama et al.
patent: 5842120 (1998-11-01), Kobayashi

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