| 摘要 |
PROBLEM TO BE SOLVED: To provide a distortion compensation circuit that sufficiently reduces a distortion component caused in a power amplifier.SOLUTION: An amplitude difference detector 7 detects an amplitude difference between an input signal delayed by a delay element 5 and an output signal of an attenuator 6 to detect a distortion component caused by a gain deviation of a nonlinear characteristic in a power amplifier 3, and outputs a control signal indicating a gain which solves the distortion component. A delay compensation circuit 8 performs a delay compensation process of advancing the phase of the control signal output from the amplitude difference detector 7, and outputs the delay-compensated control signal to a variable gain amplifier 2. |
