文档介绍：摘要
多谐振荡方波发生器在各理工科实验中具有广泛的应用,同时在生活中的数字设备、家用电器、电子玩具等许多领域也有需求。方波信号是一种应用极为广泛的信号,它在科学研究、工程教育及生产实践中的使用非常普遍。它通常作为为标准信号,应用于电子电路的性能试验或参数测量。另外,在许多测试仪中也需要用标准的方波信号检测一些物理量。所以研究多谐振荡方波发生器具有非常重要的现实意义。
基于这种形式下,我用555时基电路设计一个电路,使其产生稳定的方波,这次的设计我是以NE555芯片作为主要部分,同时结合部分外围电路,使用Protel99软件作为辅助,把设计电路焊接在铜板上,得到电路后,为5V,输出为占空比可调和频率可调的多谐振荡方波。设计的电路最后使得输出波形不失真,无杂波干涉,频率可调稳定的占空比可调的方波。
关键字:占空比,频率,NE555,方波。
Abstract
Multivibrator square-wave generator in various science and engineering experiments with a wide range of applications, while in life digital devices, home appliances, electronic toys and many other fields also have needs. Square wave signal is an application extremely wide range of signals, which in scientific research, engineering, education and production practice in the use of mon. He often used as a standard signal, used in electronic circuits or parameters of performance test measurements. In addition, in many testers also need a standard square wave signal detection of some physical quantity. Therefore, square-wave generator Multivibrator study has very important practical significance.
Based on this form, I use 555 time-base circuit design a circuit to produce a stable square wave, the design process was my capacity as the main part of the NE555 chip, combined with part of the peripheral circuits, the use of Protel99 software as a supplement to Design of welded copper on the circuit. Input DC voltage VCC of 5V, the output duty cycle and frequency adjustable adjustable multi-resonant square wave. The final design of the circuit makes the output waveform distortion, no clutter interference, frequency adjustable adjustable duty cycle square wave stability.
Keywords: duty cycle, frequency, NE555, square-wave
目录
引言……………………………………1
第一章:方波发生设计概述 3
3
第二章:总体方案设计 3
第三章:硬件设计 4
4
…………………………………4.
.555时基电路的主要参数……………………………………………..5
…………………………………………6
设计的电路图及PCB图……………………………………………………7
……..
第四章:调试和性能分析 8