Audio broadcast receiver and automatic broadcasting-station...

Details Audio broadcast receiver and automatic broadcasting-station... Audio broadcast receiver and automatic broadcasting-station...

2007-12-11

2007-12-11

Vo, Nguyen T. (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

C455S179100

Reexamination Certificate

active

10958212

ABSTRACT:
While a plurality of seek object frequencies decided in advance is being set as a receiving frequency in order, seek object frequencies meeting at least the following conditions are selected. The electric field strength of a seek object frequency being currently received must exceed a predetermined threshold value ThE. The second intermediate-frequency signal of the seek object frequency being received must be in a prescribed frequency band. When the electric field strength of a neighboring seek object frequency meets the first and second conditions, the absolute value of the difference between the electric field strength of the neighboring seek object frequency whose electric field strength exceeds ThE and the electric field strength of the seek object frequency being received must not exceed a predetermined threshold value h. The modulation factor of the seek object frequency being received must not exceed a threshold value ThM.

REFERENCES:
patent: 5511235 (1996-04-01), Duong et al.
patent: 5577076 (1996-11-01), Sato et al.
patent: 6122493 (2000-09-01), Kobayashi et al.
patent: 09-046184 (1997-02-01), None

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