| 摘要 |
<p>A power amplifier (101) amplifies a high-frequency signal. A coupler (102) monitors the signal power Pmoni amplified by the amplifier (101). A detector (103) carries out linear half-wave rectification of the input above the forward voltage of a diode, integrates it using an RC filter, and produces a detected voltage Vdet. A gain/offset amplifier (104) amplifies the detected voltage Vdet and/or applies an offset voltage to convert the detected voltage Vdet to a desired voltage, and the resulting voltage serves as the gate voltage of the power amplifier (101). As a result, power consumption in a low-power region of a power amplifier is reduced, and hardware is downsized.</p> |
