555定时器的典型应用及OrCAD/PSpice仿真  

Simulation and Analysis of Typical Applications for 555 Timer Based on OrCAD/PSpice

作　　者：滕政胜[1,2] 黄铭[2] 

机构地区：[1]百色学院科研处,广西百色533000 [2]云南大学信息学院,云南昆明650091

出　　处：《现代电子技术》2009年第7期181-184,共4页Modern Electronics Technique

摘　　要：分析了555定时器内部结构及其工作原理,利用OrCAD/PSpice对555定时器构成的单稳态触发器、施密特触发器和多谐振荡器的工作特性进行了仿真,针对仿真过程中多谐振荡器不起振的问题进行了分析,找出了两种振荡电路的有效起振方法,结果表明仿真结果与理论计算值基本相符,对555定时器的综合设计应用具有一定的参考意义。The 555 timer and its principle of the internal structure are analyzed,and the characteristics of Schmitt trigger, single- stable - state trigger and astable multivibrator constituted by 555 timer are simulated using OrCAD/PSpice. For solving no oscillation of the astable multivibrator, two analysis methods are presented. It shows that simulating result is agreement with experimental result. This research has a reference value for the integrated design application of 555 timer.

关 键 词：555定时器 EDA ORCAD/PSPICE 10.5 瞬态分析 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]