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引用第3楼笨笨先生于2010-03-29 17:17发表的 :这是标准的DTMF啊,需要特定的检测逻辑才可以判断的.而且模拟的电话会有些背景干扰,不过总体还说还是准确率还是很高的.DTMF？恩………...

Arduino自制电话拨号器首先声明，本文转载自极客工坊Ansifa的Arduino系列教程怎么拨打电话？也许这个问题很简单：拿起话筒，按话机的数字键盘拨号码。但是，有没想过，我们可以拿起电话，不需...

公司有一套设备，是将DTMB电视调制器产生的信号作为中频信号（中频频率169MHz，QAM64调制，带宽8M），与1955MHz的本振信号混频，然后滤波放大发射出来，接收下来后进行逆变换（滤波器、放大...

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