电气工程学院
课程设计说明书
（2009/2010年第一学期）
课程名称 ：电子线路课程设计
题 目 ：占空比可调的方波函数发生器硬件电路设计
专业班级 ：2010级电子信息工程二班 学 号 ：
学生姓名 ： 王思 指导教师 ： 李怀亮 设计周数 ：一周 设计成绩 ：
2012年 6月 20日
占空比可调的方波发生器电路设计
目录
一、课程设计目的··································································· 错误！未定义书签。 二、课程设计正文··································································· 错误！未定义书签。
2.1 总体论述 ··································································· 错误！未定义书签。 2.2 设计总体框图 ····························································· 错误！未定义书签。
2.2.1分析用555定时器设计的方案： ······························ 错误！未定义书签。 2.3 实验设计电路原理图 ···················································· 错误！未定义书签。
2.3.1利用555定时器设计方波的原理电路························ 错误！未定义书签。 2.4 电路仿真及测试 ·························································· 错误！未定义书签。
2.4.1仿真电路及其运行结果： ······································· 错误！未定义书签。 2.5 电路组装及测试 ·························································· 错误！未定义书签。
2.5.1电路板焊接 ························································· 错误！未定义书签。 2.5.2电路调试 ···························································· 错误！未定义书签。 2.6 器件清单 ··································································· 错误！未定义书签。 2.7硬件电路实物及其调试波形图 ········································· 错误！未定义书签。 三、实验总结 ········································································· 错误！未定义书签。 四、参考文献 ········································································· 错误！未定义书签。
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一、课程设计目的
方波信号在通信专业及日常生活中无处不在。有很多方法可以实现方波的产生，在本次课程设计中我们用1种方案设计出方波产生器，同时能方便以后实验和生活中遇到产生方波的情况。通过改变参数实现占空比可调以灵活运用方波及亲手焊制电路板，深刻体会方波的产生。提高动手能力，为以后设计和工作打下坚固基础。
二、课程设计正文
2.1 总体论述
本次设计题目为占空比可调方波函数发生器硬件电路设计。 1 设计要求
（1）设计一方波产生电路要求占空比可调 （2）输出方波电压值：3V<|Vo|<15V （3）振荡周期：2ms 使用555定时器直接产生方波，通过调节滑动变阻器，可以调节占空比。 2.2 设计总体框图 2.2.1分析用555定时器设计的方案： 555定时器是一种应用极为广泛的中规模集成电路，该电路使用灵活、方便，只需外接少量的阻容原件就可以构成单稳、多谐和施密特触发器。因而广泛用于信号的产生、变换、控制和检测。 2