简易信号发生器设计.doc

西安交通大学城市学院本科生毕业设计(论文) 摘要 PAGE VI PAGE \* MERGEFORMATV 本 科 毕 业 设 计 论 文 题 目 简易信号发生器 系 别 电气与信息工程系 专 业 测控技术与仪器 班 级 测控001 学 学生姓名 王永锋 指导教师 金印彬 2014年 06月 摘 要 随着电子测试技术的飞速发展,测试仪器正向自动化、智能化、数字化和网络化的方向发展。其中，信号发生器是一种能够产生多种波形，如三角波，方波，正弦波的电路。信号发生器是一种广泛应用于电工学教学、实验物理学，电子线路和微机原理、接口技术实验，自动化测控系统等领域的常用信号源。随着现代测量技术和现代通信技术的发展，信号源通常都要求要有具备高稳定度和高精度。 本文设计低频信号发生器，以AT89C51单片机为核心，通过键盘控制信号类型、调节频率和幅度，采用DA 转换芯片输出相应的波形，同时以LCD显示器进行实时显示信号相关信息。采用C语言进行编程，可实现方波，三角波，和正弦波三种波形的产生，且波形的频率和幅度可调。经测试该设计方案线路优化，结构紧凑，性能优越，满足设计要求。 关键词：信号发生器，单片机，DA 转换， LCD，键盘  西安交通大学城市学院本科生毕业设计(论文) STYLEREF 标题 1 \* MERGEFORMAT 目录 ABSTRACT With the rapid development of electronic testing technology, test instrument is automatic, intelligent, digital and networked direction.Among them, the signal generator is a kind of can produce various waveform, such as triangle wave, square wave, sine wave circuit.Signal generator is a kind of widely used in electrotechnics teaching, experiment physics, electronic circuit and the microcomputer principle and interface technology experiment, automatic signal source is commonly used in the field of measurement and control system, etc.With the development of modern measuring technology and modern communication technology, signal source is usually required to have high stability and high precision. Low frequency signal generator design,this paper USES AT89C51 single-chip microcomputer as the core, through the keyboard control signal types, adjust the frequency and amplitude, the DA conversion chip output corresponding waveform, at the same time with LCD real-time display signal information.We are programmed using C language, which can realize square wave, triangle wave, and sine wave waveform, and frequency and amplitude of waveform is adjustable.By testing the design scheme of circuit optimization, compact structure, superior performance, meet the design requirements.?KEY WORDS: signal g