摘要
目前DTMF信号译码,都是采用通用集成器件(单音译码电路和组合门电路)或专用DTMF信号译码集成电路(如MC145436)等组成译码电路来进行。但在很多情况下,DTMF译码器输出的数据仍需送入单片机进行相应的运算及处理,从而进行控制其它各种设备的动作。为了简化电路降低成本,提高单片机的工作效率,可直接使用单片机进行DTMF译码和相应的数据运算、处理等,即全由一片单片机来完成。通过对DTMF信号译码算法的探讨和实验检测数据论证,认为完全可使用单片机来进行DTMF信号的译码,并且效果能完全达到设计要求。从而可省去成套译码电路,又能达到简化电路降低成本的目的。
It usually adopts the decoding circuit which is combined by general integrated component （single sound coding circuit ＆ combined circuits） or the DTMF special signal decoding IC to build the DTMF signal decoding. But in many times,the outputs of DTMF decoding still have to be input into microcontroller for calculating. In order to simplify circuit,save cost and improve efficiency, one microcontroller can be directly used to do DTMF coding and data calculating. The experiment results present that microcontroller can be completely used in DIMF single decoding and reach design demand completely and can reach the purpose of circuit cost reduction by predigesting the decoding circuit.
出处
《电子测量技术》
2008年第5期158-161,共4页
Electronic Measurement Technology
