Patent ID: 7332961
Filing Date: 2008-02-19
Classification: H03F

Abstract:
1. A method for a predistortion linearization of a branched signal for a RF amplifier, comprising: supplying an input signal to at least one input terminal; distributing the input signal present on the at least one input terminal to a plurality of parallel branch-circuits as branched signals by a power distributing circuit; controlling a phase parameter and an amplitude parameter of a first one of the branched signals by at least one nonlinear branch-circuit of the plurality of parallel branch-circuits; controlling a phase parameter and an amplitude parameter of a second one of the branched signals by at least one linear branch-circuit of the plurality of parallel branch-circuits; combining output signals of the at least one nonlinear branch-circuit with output signals of the at least one linear branch-circuit by a power combining circuit; and providing a final output signal of a predistortion unit from the power combining circuit on at least one output terminal, wherein the phase parameter of the first branched signal is controlled using at least one phase control unit, and wherein the amplitude parameter of the first branched signal is controlled using at least one linear amplitude control unit and at least one nonlinear amplitude control unit.