To provide a collection circuit for distortion compensation data of a transmission power amplifier for securing the continuity of a collection processing and the signal throughput of a highly efficient DSP even when an ACP data collection processing increases.

The transmission power amplifier performs an arithmetic processing of cumulatively adding ACP data which are distortion signals and generating an average value and the signal processing of non distortion signal data at each prescribed timing by using a DSP circuit, outputs distortion compensation control data as the result and compensates distortion by adaptive pre-distortion control. The collection circuit is provided with a cumulative addition circuit for the ACP data, a setting register circuit for setting the data length of the ACP data to a prescribed value, a counter circuit for turning the number of times of adding the ACP data to the prescribed value and an ACP data register circuit between the cumulative addition circuit and the DSP circuit for controlling the read of the ACP data. The distortion compensation control data are taken out from the DSP circuit.