ICL8038波形发生器论文

郑州大学

本科毕业论文（设计）

题目函数信号发生器的设计

指导教师职称

学生姓名学号

专业自动化班级 2班

院（系）电子信息工程学院

完成时间 2012年4月20日

函数波形发生器

摘要

本系统以ICL8038集成块为核心器件，制作一种函数信号发生器，制作成本较低。适合学生学习电子技术测量使用。ICL8038是一种具有多种波形输出的精密振荡集成电路，只需要个别的外部元件就能产生从0.001Hz～30KHz的低失真正弦波、三角波、矩形波等脉冲信号。输出波形的频率和占空比还可以由电流或电阻控制。另外由于该芯片具有调制信号输入端，所以可以用来对低频信号进行频率调制。

函数信号发生器根据用途不同，有产生三种或多种波形的函数发生器，其电路中使用的器件可以是分离器件，也可以是集成器件，产生方波、正弦波、三角波的方案有多种，如先产生正弦波，根据周期性的非正弦波与正弦波所呈的某种确定的函数关系，再通过整形电路将正弦波转化为方波，经过积分电路后将其变为三角波。也可以先产生三角波-方波，再将三角波或方波转化为正弦波。随着电子技术的快速发展，新材料新器件层出不穷，开发新款式函数信号发生器，器件的可选择性大幅增加，例如ICL8038就是一种技术上很成熟的可以产生正弦波、方波、三角波的主芯片。所以，可选择的方案多种多样，技术上是可行的。

关键词 ICL8038/正弦波/三角波/矩形波

F UNCTION WAVEFORM GENERATOR

ABSTRACT

This system to ICL8038 integrated piece for the core device, making a kind of function signal generator, production cost is low. Suitable for use in electronic measurement of students ' learning. ICL8038 is a kind of has a variety of wave output precision oscillation integrated circuits, only need to individual external components can produce from 0.001 Hz ~ 30 KHz low distortion sinusoidal, triangle, rectangle wave waves pulse signal. The frequency of the output waveform and occupies empties compared to still can control by current or resistance. Plus, because the chip has modulation signal input, so can be used to the low frequency signal frequency modulation.

Function signal generator under uses different, has produced three species or multiple waveform of function generator, its circuit in the using of devices can is separation devices, also can is integrated devices, produced square, and sine wave, and triangle wave of programmed has multiple, as first produced sine wave, under periodic of non-sine wave and sine wave by is of a species determines of function relationship, then by plastic circuit will sine wave transformation for square, after integral circuit How will it`s becomes triangle wave. Y ou can also have a triangle wave-wave, triangle wave or square wave into sine wave. With the rapid development of electronic technology, new materials and new device emerge, develop new style function signal generator, devices can be selectively increased substantially, for example ICL8038 is a technically mature can produce a sine wave, square wave, triangle wave of the main chip. So, you can choose variety of programmed, is technically feasible.

KEY WORDS ICL8038, sine wave, triangular wave, rectangular wave

目录

中文摘要 (Ⅰ)

英文摘要 (Ⅱ)

1绪论 (1)

1.1 项目建议 (1)

1.2 项目可行性研究 (1)

2方案选择 (2)

2.1[方案一] (2)

2.2 [方案二] (3)

3系统原理图 (4)

3.1 波形发生设计原理图 (4)

3.2 供电电源原理图 (5)

4系统工作原理与分析 (6)

4.1ICL8038芯片简介 (6)

4.1.1ICL8038芯片描述 (6)

4.1.2 ICL8038的功能特点 (6)

4.1.3 ICL8038原理简介 (7)

4.2电路分析 (8)

4.3工作原理 (9)

4.4正弦函数信号的失真度调节 (11)

5 稳压电源 (12)

5.1 直流稳压电源设计思路 (12)