Patent ID: 6417731
Filing Date: 2002-07-09
Classification: H03F

Abstract:
A distortion-compensated amplifier device comprising a distortion-detecting loop wherein an input signal to the distortion-compensated amplifier device is distributed; with respect to one distribution signal vector adjustment is performed by vector adjustment means and a distortion is generated by a pre-distortor; the one distribution signal is amplified by a main amplifier; and the amplification signal and the other distribution signal are composed to thereby detect a distortion component contained in the amplification signal, a distortion-compensating loop wherein the amplification signal from the main amplifier and the distortion component detected by the distortion-detecting loop are composed to thereby eliminate the distortion-component from the amplification signal, and a control part that according to the distortion component detected by the distortion-detecting loop controls the vector adjustment of the vector adjustment means and the generation of the distortion of the pre-distortor, whereinthe control part comprises distortion component level detecting means that detects the level of the distortion component detected by the distortion-detecting loop; vector adjustment controlling means that controls the vector adjustment of the vector adjustment means so that an average value of the levels detected by the distortion component level detecting means may become small; and pre-distortor controlling means that controls the generation of the distortion of the pre-distortor so that peak values of the levels detected by the distortion component level detecting means may become small.