基于ICL8038的函数信号发生器毕业设计

摘要

喷淋除尘器本系统以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，波形，原理图，常用接法

摘要·······································································1

目录 ·····································································2

第一章项目任务 ·························································3

1.1 项目建 ·····························································3

1.2 项目可行性研究·······················································3

第二章方案选择··························································4

2.1 [方案一] ···························································4

2.2 [方案二发烟筒] ···························································lzr种子4

第三章基本原理 ··························································5

3.1函数发生器的组成 ····················································6

3.2 方波发生器 ························································6

3.3 三角波发生器 ······················································7

3.4 正弦波发生器 ······················································9

第四章稳压电源 ························································10

4.1 直流稳压电源设计思路 ·············································10

4.2 直流稳压电源原理 ·················································11

4.3设计方法简介 ······················································12

第五章振荡电路 ························································15

5.1 RC振荡器的设计 ··················································15

二钼酸铵

第六章功率放大器 ·························································17

6.1 OTL 功率放大器 ··················································17

第七章系统工作原理与分析英姿带·················································19

7.1 ICL8038芯片简介 ··················································19

7.2 ICL8038的应用 ··················································19伯胺

7.3 ICL8038原理简介 ··················································19

7.4 电路分析 ··························································20

7.5　工作原理 ························································20

7.6 正弦函数信号的失真度调节 ··········································23

7.7 ICL8038的典型应用 ··············································24

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