摘要
单音检测技术是ＭＯＮＯＦＡＸ调制解调器中用于识别传真通信过程中单音标识信号的技术。本文简单地讨论了调制解调器的单音检测电路的原理，分析了相应的滤波器设计方法，并给出了具体计算结果。
This paper introduces the tone detection technique for Fax communication in a MONOFAX Modem.The principle of the tone detection circuit is also studied and a method of designing the filter is given. At last, the coefficient corresponding to the filter is calculated.
