简易数字存储示波器

文档编号:CK138   文档字数:15560,页数:38  附外文翻译

摘  要
 数字示波器自上个世纪七十年代诞生以来，其应用越来越广泛，已成为测试工程师必备的工具之一。随着近几年来电子技术取得突破性的发展，全世界数字示波器市场进一步扩大。
 本文介绍了简易数字存储示波器设计的基本理论，讨论了输入输出、控制模块、人机界面接口以及显示模块的相关内容。信号前向调整模块采用高速低噪音模拟开关(MAX4545)和宽带运算放大器(MAX817)构成可编程运算放大器，对幅度不等的输入信号分别进行不同等级的放大处理。数据采集模块采用可编程器件(EPM7128SLC84-15)控制高速Ａ／Ｄ(TLC5510)对不同频率的输入信号分别以相应的采样速度予以采样，并将采样数据存在双口ＲＡＭ(IDT7132)中。数据输出模块采用另一片可编程器件(EPM7128SLC84-15)控制两片Ｄ／Ａ(DAC0800)分别输出采样信号和锯齿波,在示波器上以Ｘ－Ｙ的方式显示波形。控制模块以AT89C52单片机为控制核心，协调两片可编程器件的工作，并完成其它的测量，计算及控制功能。

关键词：数字示波器；人机界面接口；可编程控制器件；采样量化

Abstract
Digital oscilloscope since the birth of the seventies last century, and their application is widespread and has become an essential tool for engineers to test one. With the electronic technology in recent years the development of a breakthrough, the world market is going to further expand the digital oscilloscope.
This paper introduces the design of simple digital storage oscilloscope's basic theory, discussed the input and output, control modules, human-machine interface, as well as the relevance of the content module. Signal adjustment module to the high-speed low-noise analog switch (MAX4545) and broadband operational amplifier (MAX817) constitutes a programmable operational amplifier, the amplitude of the input signal range were dealing with different levels of zoom. Data acquisition module using programmable devices (EPM7128SLC84-15) to control high-speed A / D (TLC5510) of different frequency to the input signal, respectively, corresponding to the sampling rate sampling, the sampling data and dual-port RAM (IDT7132) in. Data output module using another chip programmable devices (EPM7128SLC84-15) control the two D / A (DAC0800), respectively, and the sawtooth wave output signal sampling in the oscilloscope to the X-Y display waveforms. AT89C52 single-chip control module to control the core of the coordination of the two programmable devices and the completion of other measurement, calculation and control functions.
 
Keywords： Digital oscilloscope；Man-machine interface；Programmable control device；sampling and Quantitative
目 录
摘要…. . .….. Ⅱ
Abstract.. Ⅲ目录.Ⅳ
1 引言……..1
 1.1 数字存储示波器介绍………. …..1
1.2 研究内容……3
2 简易数字存储示波器总体方案的设计与论证……... .4
3单元电路方案设计7
3.1 触发电路……7
3.2 输入电路……9
 3.2.1  电路要求……..9
 3.2.2 输入电路方案设计与论证.9
 3.3  采样与存储控制电路的设计…..11
3.3.1 采样模块………11
3.3.2 存储控制电路…12
3.4 输出电路……16
3.5 显示模块……17
3.5.1 锯齿波形成电路：………19
3.5.2 双踪示波电路…20
4 主要元器件介绍..22
4.1 AT89C52简介22
4.2 TLC5510……..24
4.3 8255简介…..25
5 结果测试分析……27
 5.1．测频模块…..27
 5.2字符显示模块.27
 5.3峰峰值测量功能……….28
 5.4 系统软件……28
 5.5．系统测试…..29
    5.6．结果分析…..30
6  总结. …..31
致谢………...32
主要参考文献……...33

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