POWER CONTROL CIRCUIT AND POWER AMPLIFIER POWER CONTROL METHOD

摘要

It is possible to provide a power control circuit and a power amplifier power control method capable of correcting degradation of distortion characteristic generated by reduction of an isolator used for stabilizing load impedance of a power amplifier, without attenuating the transmission power. Degradation of the distortion characteristic of the power amplifier (100) is corrected by paying an attention on that the distortion characteristic of a power amplifier (100) has a relationship with a power consumption value. The power consumption value is obtained by detecting a bias voltage value applied to the power amplifier (100) and a current consumption value of the power amplifier (100). The obtained power consumption value is compared to a reference power value acquired in advance and the output voltage value of the bias power source is varied so as to minimize the difference. This corrects the degradation of the distortion characteristic generated by reducing the isolator used for stabilizing the load impedance of the power amplifier (100) without attenuating the transmission power.