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yinpin-xinhao-fasheng

于 2015-02-02 发布 文件大小:6KB
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  利用单片机定时器产生高低电位各0.5毫秒的方波,该方波再经二阶滤波变成1K赫兹的正弦波,即为音频信号(To produce high and low potential of each 0.5 ms using SCM timer Fang Bo, the square wave and then by two order filter into 1K Hz sine wave, namely for audio signal )

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