基于单片机的信令音信控制系统的设计  

The design of the signaling sound control system Based on microcontroller

作　　者：伍麟珺[1] 

机构地区：[1]湖南工学院电气与信息工程系

出　　处：《电子世界》2014年第3期25-26,共2页Electronics World

摘　　要：本文以单片机为核心控制器件,设计了一款简单实用的程控交换信令音控制系统。整个系统由RC文氏桥振荡电路产生450HZ的基准信号音源,采用AT89S52作为控制芯片,根据输入信号的不同状态,产生不同持续时间的高低电平,从而控制模拟开关CD4066的打开和闭合,在开关的输出端得到不同的断续时间的振荡信号,形成不同含义的信号音。This paper design a kind of simple practical program-controlled exchange signaling sound control system, with the single chip processor as the core m control devices. The whole system consists of RC wien bridge oscillatir^g circuit produce 450 HZ benchmark signals of the audio source, uses AT89S52 microcontroller as control chip, according to the different states of the input signal, produce different duration of high and low level, so as to control the CD4066 analog switch to opening and closing, in an output terminal of the switch to obtain the different intermittent time of the oscillation signal, form different meaning of the signal.

关 键 词：文氏桥振荡器 单片机 模拟开关 NO 7信令 

分 类 号：TN929.5[电子电信—通信与信息系统]