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,~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
目录
摘要·······································································1
目录·····································································2
第一章项目任务·························································3
项目建·····························································3
项目可行性研究·······················································3
第二章方案选择··························································4
[方案一] ···························································4
[方案二] ···························································4
第三章基本原理··························································5
····················································6
方波发生器························································6
三角波发生器
······················································7
正弦波发生器······················································9
第四章稳压电源························································10
直流稳压电源设计思路·············································10
直流稳压电源原理·················································11
······················································12
第五章振荡电路························································15
RC振荡器的设计··················································15
第六章功率放大器·························································17
OTL 功率放大器··················································17
第七章系统工作原理与分析······································
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