Patent ID: 6856196
Filing Date: 2005-02-15
Classification: H03F

Abstract:
1. A distortion compensator that compensates for distortion arising in an amplifier that amplifies a signal, wherein: the distortion compensator comprises: signal change means that changes the amplitude or phase or both of the signal subject to amplification by the amplifier, signal level detection means that detects the level of the signal subject to amplification by the amplifier, signal level change direction detection means that detects whether the direction of change in the level of the signal subject to amplification by the amplifier is the positive direction or the negative direction, and signal change control means that stores the correspondence between the signal level and a mode of changing the signal for distortion compensation in the case that the direction of change in the signal level is the positive direction, and also stores the correspondence between the signal level and the mode of changing the signal for distortion compensation in the case that the direction of change in the signal level is the negative direction, and based on the content thus stored, controls the signal change means such that it changes the signal subject to amplification by the amplifier in the mode of changing the signal corresponding to the direction of change in the signal level detected by the signal level change direction detection means and the signal level detected by the signal level detection means.