Portable radio terminal, antenna selector control method for...

Details Portable radio terminal, antenna selector control method for... Portable radio terminal, antenna selector control method for...

2007-12-11

2007-12-11

Feild, Joseph (Department: 2617)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S090300, C455S091000, C455S101000, C455S078000, C455S069000, C455S522000, C331S100000, C330S010000

Reexamination Certificate

active

11169767

ABSTRACT:
An antenna selector selects one of the plurality of antennas according to an antenna selection signal. The antenna selector includes a voltage converter and an analog switch circuit. The voltage converter converts a power-supply voltage to a predetermined output voltage higher than the power-supply voltage. The analog switch circuit operates with the predetermined output voltage from the voltage converter or the power-supply voltage being applied thereto. A voltage converter controller controls the voltage converter to operate/halt according to a power level of the transmission signal generated by the transmitter. The predetermined output voltage is applied to the analog switch circuit when the voltage converter is operating and the power-supply voltage is applied to the analog switch circuit when the voltage converter is halted.

REFERENCES:
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patent: 6011962 (2000-01-01), Lindenmeier et al.
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patent: 2002/0109555 (2002-08-01), Hwang
patent: 2002/0149517 (2002-10-01), Iguchi et al.
patent: 2005/0064828 (2005-03-01), Kurakami et al.
patent: 2005/0129068 (2005-06-01), Ginzburg et al.
patent: 2005/0143024 (2005-06-01), Sung et al.
patent: 5-175877 (1993-07-01), None
patent: 9-325059 (1993-12-01), None

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