Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
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.
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Feild Joseph
Nguyen David Q.
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