Transmission device, transmission output control method, and...

Details Transmission device, transmission output control method, and... Transmission device, transmission output control method, and...

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

10529538

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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