Telecommunications – Transmitter – With feedback of modulated output signal
Patent
1992-06-19
1996-11-12
Pham, Chi H.
Telecommunications
Transmitter
With feedback of modulated output signal
455127, H04B 104
Patent
active
055749917
ABSTRACT:
In a transmission power control circuit which performs power amplification of a transmission signal to one of several predetermined levels in response to a control signal and outputs the amplified signal, bias voltage of the power amplifier circuit is set to the optimum in response to the output power of multiple levels, respectively. Since the bias voltage is set to the optimum, the power loss in the power amplifier circuit is decreased and the efficiency of the power amplifier circuit is improved.
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Miyama Keisei
Ono Hideyo
Mitsubishi Denki & Kabushiki Kaisha
Pham Chi H.
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