| 摘要 |
Provided is an apparatus for controlling a bias of a power amplifier in a mobile communication terminal, which has the power amplifier for amplifying an input RF signal and an antenna for transmitting the amplified output RF signal. The apparatus includes a power detecting unit for detecting power output from the power amplifier and generating a control voltage based on the detected power, and a DC-DC converter for generating and applying a DC (Direct Current) voltage based on the control voltage of the power detecting unit, as a bias voltage of the power amplifier, wherein the power amplifier operates based on the bias voltage of the DC-DC converter to amplify and output the input RF signal.
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