Patent ID: 6937097

Claim:
A high-frequency power amplifier having differential inputs, comprising: a power supply unit; a first amplification circuit unit for amplifying high-frequency differential input signals of differential input terminals INA, INB into outputting a single high-frequency signal; an intermediate impedance matching unit for impedance-matching the single high-frequency signal amplified by the first amplification circuit unit; a second amplification circuit unit for receiving and amplifying the impedance-matched single high-frequency signal from the intermediate impedance matching unit and outputting the amplified signal to an antenna through an output terminal thereof; a power control circuit unit for controlling a power output to the antenna through the output terminal of the second amplification circuit unit by varying a voltage of a power control terminal; a first bias circuit unit for determining an operation reference point of the first amplification circuit unit; and a second bias circuit unit for determining an operation reference point of the second amplification circuit unit.