| 摘要 |
Disclosed is a transmission amplifier having a distortion compensator for compensating for distortion of an amplifier; an amplifier for amplifying the transmit signal that has undergone distortion compensation; a feedback unit for feeding an output signal from the amplifier back to the distortion compensator; and a delay circuit for inputting the transmit signal to the distortion compensator upon delaying the transmit signal for a delay time equivalent to time required for the feedback signal to arrive at the distortion compensator. A delay time TDS of the feedback signal at the time of stand-alone operation of the transmission amplifier and a delay time difference DeltaT between delay times of the feedback signal at the time of stand-alone operation and at the time of parallel operation are stored in advance. The delay time TDS is set in the delay circuit at the time of stand-alone operation, and (TDS+DeltaT) is set in the delay circuit at the time of parallel operation.
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