扬声器的自滤波特性与D类功放失真的改善  

Characteristics of self filter-wave of loudspeakers and improvement of distortion of D kind of power amplification

作　　者：刘长学[1] 

机构地区：[1]盐城工学院电气工程系,江苏盐城224003

出　　处：《广西工学院学报》2004年第4期62-64,73,共4页Journal of Guangxi University of Technology

摘　　要：应用动圈式扬声器的电-力-声类比等效线路对动圈式扬声器的频率特性进行了初步的研究,提出了利用扬声器的自滤波性能改善因D类功放移相网络引起信号相位失真的方法。同时,采用比较、反馈的方法对音频信号的谐波加以抑制,使得数字功放的总体失真指数下降。The paper analyzed the frequency charaeteristics of a loudspeaker through the analogue and equivalent circuit of electricity and power and sound of the loudspeaker.The influences on audio-frequency signals by phase-distortion network should be reduced as much as possible,and at the same time the comparision and feedback method was used to control audio-frequency signals so as to make the overall distortion index of digital power amplifiers go down.

关 键 词：D类功放 扬声器 滤波特性 滤波性能 失真 数字功放 音频信号 改善 下降 指数 

分 类 号：TN722[电子电信—电路与系统] TN912.26