Third harmonic distortion calculation of a self-oscillating power amplifier 被引量：1

Third harmonic distortion calculation of a self-oscillating power amplifier

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摘要 It is difficult to analyze the harmonic distortion of a self-oscillating power amplifier (SOPA),because the SOPA is a hard nonlinear system without an external clock.The single or multiple sinusoidal inputs describing function (DF) method is commonly used to linearize a nonlinear element,but this method considers only the components at the same frequencies as the input signals (i.e.,fundamental components) at the nonlinear element's output.In this paper,besides the fundamental components,the third harmonic components are also calculated at the output of a comparator with three sinusoidal inputs,to create a linearized model of the comparator,and thus of the SOPA.The third harmonic distortion of the SOPA is calculated.The models of the zeroth and the first order SOPA are verified by behavioral simulation using MATLAB. It is difficult to analyze the harmonic distortion of a self-oscillating power amplifier （SOPA）, because the SOPA is a hard nonlinear system without an external clock. The single or multiple sinusoidal inputs describing function （DF） method is commonly used to linearize a nonlinear element, but this method considers only the components at the same frequencies as the input signals （i.e., fundamental components） at the nonlinear element＇s output. In this paper, besides the fundamental components, the third harmonic components are also calculated at the output ofa comparator with three sinusoidal inputs, to create a linearized model of the comparator, and thus of the SOPA. The third harmonic distortion of the SOPA is calculated. The models of the zeroth and the first order SOPA are verified by behavioral simulation using MATLAB.

作者 Yu-hua CHENG Nian-xiong TAN

机构地区 Institute of VLSI Design

出处《Journal of Zhejiang University-Science C(Computers and Electronics)》 SCIE EI 2011年第4期307-316,共10页 浙江大学学报C辑（计算机与电子（英文版）

关键词 Describing function (DF) COMPARATOR Self-oscillating power amplifier (SOPA) Third harmonic distortion Describing function （DF）, Comparator, Self-oscillating power amplifier （SOPA）, Third harmonic distortion

分类号 TN402 [电子电信—微电子学与固体电子学]

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