计算机应用研究2017，Vol.34Issue(2)：453-457,5.DOI:10.3969/j.issn.1001-3695.2017.02.030
一种改进的数字PWM发生器非线性误差预校正方法
Improved nonlinear error precorrection method for digital PWM generators
摘要
Abstract
Due to the nonlinearity of the digital pulse width modulation (PWM) generators in digital class D power amplifiers,this paper proposed an improved nonlinear error precorrection method for digital PWM generators.The proposed method took advantage of the characteristics of ∑-△ modulators to modify the correction factor expression of the original method.This method not only can correct the nonlinear error produced by the digital PWM generator,but also can solve the original method's problem that the energy of the correction factors adding to the ∑-△ modulator is too big to cause the integrator outputs saturate and oscillate,so it can degrade the performance of the power amplifier system.The experimental results indicate that the energy of the correction factors calculated from this method is far less than that calculated from the original nonlinear error precorrection method and that the proposed method can basically eliminate the nonlinear error produced by the digital PWM generator.关键词
数字D类功放/脉冲宽度调制/非线性误差/校正因子Key words
digital class D power amplifier/pulse width modulation/nonlinear error/correction factor分类
信息技术与安全科学引用本文复制引用
于泽琦,王凤琴,李祖贺,樊养余..一种改进的数字PWM发生器非线性误差预校正方法[J].计算机应用研究,2017,34(2):453-457,5.基金项目
国家自然科学基金资助项目(61601411) （61601411）
河南省科技厅基础与前沿技术研究项目(142300410248) （142300410248）
河南省高等学校重点科研计划项目(15A510041) （15A510041）
河南省科技攻关计划项目(142102210080) （142102210080）
