| 摘要 |
PROBLEM TO BE SOLVED: To provide a power amplifier circuit capable of performing power amplification of a plurality of radio signals that respectively have different frequency bands under an optimum bias condition. SOLUTION: The power amplifier circuit 11 includes an amplifier 20 for performing power amplification of any radio signal selected among a plurality of radio signals which respectively have different frequency bands, and a bias control circuit 61 for variably setting a bias voltage to be supplied to the amplifier 20 in accordance with the frequency band of the selected one radio signal. COPYRIGHT: (C)2011,JPO&INPIT |
