动态倍频PWM音频输出方案及其在dsPIC芯片上的实现  

PWM-based Dynamic Double Frequency Audio Output Method and Its Realization on the Chip of dsPIC

作　　者：廖晓东[1] 颜泽球[1] 

机构地区：[1]福建师范大学物理与光电信息科技学院,福建福州350108

出　　处：《福建师范大学学报（自然科学版）》2009年第3期54-57,共4页Journal of Fujian Normal University：Natural Science Edition

基　　金：福建省自然科学基金资助项目(A08100052008J0015)

摘　　要：研究PWM在音频输出上的应用,提出一种可适于一般情况的动态倍频PWM的音频处理方法.该方法克服了传统音频输出中D/A转换器阻抗离散性影响、易受温度等环境干扰、成本和功耗相对较高的缺点,解决了基于PWM的D/A的精度与输出带宽的矛盾,并在Microchip dsPIC30F6014数字信号控制器上实现.该方案可适用于电子噪声严重的环境下进行音频信号传输,是性价比优良的音频信号恢复方案.Research on the application of audio output with PWM technology, and address a new method of PWM dynamic audio processing, which May be suitable for general case. The new method avoid the shortcomings of traditional D/A converter, such as its discrete resistance, susceptible to environmental, temperature, power consumption and its relatively high cost. The new method is also a good solution to the conflict between the accuracy of PWM and its bandwidth, It was realized on the digital signal controller： Microchip dsPIC30F6014. The new method is a good choice for audio signal transmission in electronic noise, It is an ideal method of audio signal the resumption.

关 键 词：PWM 动态倍频 补偿 语音输出 DSPIC30F6014 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]