| 动态倍频PWM音频输出方案及其在dsPIC芯片上的实现 |
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| 引用本文： | 廖晓东,颜泽球.动态倍频PWM音频输出方案及其在dsPIC芯片上的实现[J].福建师范大学学报(自然科学版),2009,25(3). |
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| 作者姓名： | 廖晓东 颜泽球 |
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| 作者单位： | 福建师范大学物理与光电信息科技学院,福建,福州,350108 |
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| 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.
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| 关 键 词： | 动态倍频 补偿 语音输出 |
PWM-based Dynamic Double Frequency Audio Output Method and Its Realization on the Chip of dsPIC |
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| LIAO Xiao-dong,YAN Ze-qiu.PWM-based Dynamic Double Frequency Audio Output Method and Its Realization on the Chip of dsPIC[J].Journal of Fujian Teachers University(Natural Science),2009,25(3). |
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| Authors: | LIAO Xiao-dong YAN Ze-qiu |
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| Institution: | School of Physics and OptoElectronics Technology;Fujian Normal University;Fuzhou 350108;China |
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| Abstract: | 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 dsPI... |
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| Keywords: | PWM dsPIC30F6014 |
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