Receiver device having improved selectivity characteristics

Details Receiver device having improved selectivity characteristics Receiver device having improved selectivity characteristics

2007-10-16

2007-10-16

Nguyen, Lee (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

C455S188200

Reexamination Certificate

active

10951762

ABSTRACT:
In a UHF band operation, a Bu terminal supplies a power supply voltage, and a (BL+BH) terminal does not supply the power supply voltage. Thereby, switching diodes are turned on, and a switching diode is turned off. In the UHF band operation, only a UHF signal in a signal provided from an ANT terminal is output to a UHF input tuning circuit. In a VHF band operation, the (BL+BH) terminal supplies the power supply voltage, and the Bu terminal does not supply the power supply voltage. Consequently, the switching diode is turned on, and the switching diodes are turned off. In the VHF band operation, only a VHF signal in the signal provided from the ANT terminal is output to a VHF input tuning portion via a filter portion.

REFERENCES:
patent: 4326295 (1982-04-01), Matsumoto et al.
patent: 4577171 (1986-03-01), Heigl et al.
patent: 3-128339 (1991-12-01), None
patent: 4-369918 (1992-12-01), None
patent: 6-253226 (1994-09-01), None
patent: 8-181556 (1996-07-01), None

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