Patent ID: 7133466
Filing Date: 2006-11-07
Classification: H03F,H03G

Abstract:
1. An amplifying apparatus comprising: two transmission amplifiers; and a combiner for combining output signals of the two transmission amplifiers and for outputting a combined signal, wherein each transmission amplifier includes: a predistortion unit for determining a distortion compensation component based on the output signal of the combiner, and for predistorting an input signal of the transmission amplifier based on the determined distortion compensation component; and a gain control unit for attenuating the predistorted input signal to set lower than in the steady state by reducing the gain lower than a steady value in the transition from the state where both of the transmission amplifiers operate to the state where either of the transmission amplifiers operates, or in the transition from the state where either of the transmission amplifiers operates to the state where both of the amplifiers operate, or at the time of removal of either of the transmission amplifiers, or at the time of attachment of the removed transmission amplifier an amplifier for receiving the attenuated predistorted input signal and for outputting an amplified signal.