Patent ID: 7822393

Claim:
A transmission apparatus having a power amplifier that amplifies power of a transmission signal and capable of switching an operation mode of the power amplifier between saturation mode and non-saturation mode, the transmission apparatus comprising: a power supply voltage adjustment circuit that controls power supply voltage supplied to the power amplifier; an input signal amplitude adjustment circuit that inputs to a signal input terminal of the power amplifier a first input signal comprising an input signal subjected to amplitude adjustment; a bypass circuit that inputs to the signal input terminal of the power amplifier a second input signal bypassing the input signal amplitude adjustment circuit; and a bypass control circuit that switches an input for the power amplifier, wherein the bypass control circuit inputs the first input signal to the power amplifier when the power amplifier is operated in the non-saturation mode and inputs the second input signal to the power amplifier when the power amplifier is operated in the saturation mode.