Telecommunications – Transmitter and receiver at same station – With transmitter-receiver switching or interaction prevention
Reexamination Certificate
2008-11-28
2011-11-22
Williams, Howard (Department: 2819)
Telecommunications
Transmitter and receiver at same station
With transmitter-receiver switching or interaction prevention
C455S083000, C455S127100, C330S127000
Reexamination Certificate
active
08064844
ABSTRACT:
In a wireless communication apparatus in a time division duplex system, a transmission signal generation unit generates a transmission signal. A power amplifying device amplifies the generated transmission signal. A control signal generation device generates a drain voltage control signal for control of the drain voltage of the power amplifying device, and a gate voltage control signal for control of the gate voltage of the power amplifying device. The switch unit switches off the drain power supply of the power amplifying device during reception in the time division duplex system according to the drain voltage control signal. In addition, the power amplifying device sets a higher gate voltage during reception in the time division duplex system higher than during transmission according to the gate voltage control signal.
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patent: H04-373317 (1992-12-01), None
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Honda Atsushi
Ohashi Yoji
Oishi Yasuyuki
Yokoo Kaoru
Fujitsu Limited
Fujitsu Patent Center
Williams Howard
LandOfFree
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