Telecommunications – Transmitter – Power control – power supply – or bias voltage supply
Reexamination Certificate
2008-04-29
2008-04-29
Urban, Edward F. (Department: 2618)
Telecommunications
Transmitter
Power control, power supply, or bias voltage supply
C455S127200, C455S102000, C455S522000, C375S297000, C375S300000
Reexamination Certificate
active
07366482
ABSTRACT:
Either linear operating mode or saturation operating mode is set as the operating mode of a high-frequency power amplifier on the basis of an operating mode set signal. The gain of a variable gain amplifier provided in front of the high-frequency power amplifier and values of output voltage and bias current supplied from a supply voltage/bias current control circuit to the high-frequency power amplifier are switched. The gain of the variable gain amplifier in the saturation operating mode is formed so as to be higher by a predetermined value than that in the linear operating mode. Accordingly, the high-frequency power amplifier operates in the designated operating mode, so that the output transmission power range can be widened.
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Arayashiki Mamoru
Hara Yoshihiro
Chow Charles
Matsushita Electric - Industrial Co., Ltd.
Pearne & Gordon LLP
Urban Edward F.
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