基于ICL8038的函数信号发生器毕业设计说明.doc

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1、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

2、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，常用接法目录摘要························································

3、···············1目录·····································································2第一章项目任务·························································31.1项目建·····························································31.2项目可行性研究··············································

4、·········3第二章方案选择··························································42.1[方案一]···························································42.2[方案二]···························································4第三章基本原理··························································

5、53.1函数发生器的组成····················································63.2方波发生器　························································63.3三角波发生器　······················································73.4正弦波发生器······················································9第四章稳压电源··········

6、··············································104.1直流稳压电源设计思路·············································104.2直流稳压电源原理·················································114.3设计方法简介······················································12第五章振荡电路···································

7、·····················155.1RC振荡器的设计··················································15第六章功率放大器·························································176.1OTL功率放大器··················································17第七章系统工作原理与分析·················································

8、197.1ICL8038芯片简介·············································