EXPANSION nonlinear distortion in amplifiers Class 'D' On the Pulse Width Modulation

摘要

The invention relates to the field of radio engineering and can be used for the modernization of existing and development of new power amplifiers class «D».; The inventive compensator nonlinear distortion in class amplifier «D» pulse width modulation comprises a physical amplifier model, which is amplified x signal (t) is supplied directly and to the main amplifier through a low pass filter (F1), identical to the filter at the output of the amplifier model (F2); an adder, which receives the distorted signal y (t) output from the amplifier model. At the adder output signal x1 (t) contains the components predistortion compensating distortion in the main amplifier path. Proceeding in analogy with negative feedback compensator eliminates closed feedback loop, while maintaining the stability of the amplifier to self-excitation.