摘要
本文介绍了单片机应用系统中高精度DTMF双音多频信号及其远距离DTMF通讯的实现方法,同时给出了一种新颖的π型电阻网络D/A转换器和低通滤波网络。
This paper describes a method of rcallzing high precision Dual Tone Multiple Frequency Sig nal and the far distancc communication, provides a novel π-form resistor network D/A converter and a low pass filter network in the mcantime.
出处
《浙江师大学报(自然科学版)》
1998年第1期29-33,共5页
Journal of Zhejiang Normal University(Natoral Sciences)
关键词
DTMF
滤波网络
远距离通讯
单片机应用系统
Single-chip Computer
Dual Tone Multiple Freqency
Communication
Sample with complete period
π-form resistor network
Filter network