江南大学物联网工程学院电子技术课程设计实验报告2014.docx

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1、江南大学物联网工程学院电子技术课程设计实验报告实验名称：正弦波发生、频率显示电路专业班级：____实验时间：2014.6.20-2014.6.25学生姓名：学号：_______同实验者：实验成绩：目录一、题目名称············································4二、设计任务和要求·······································4三、电路及工作原理·······································4（a）总体框图及工作原理····························

2、······4（b）单元电路及工作原理··································5（1）正负电源电路·····································5（2）正弦波发生及波形变换电路·························5（3）单稳态定时电路···································6（4）频率计数显示电路·································7（5）超量程指示电路···································8（6）控制电路···

3、······································8（c）完整电路图··········································9四、安装与调试··········································10（a）使用仪器仪表·······································10（b）中规模器件的管脚图及功能表·························10（1）uA741··········································10（2）

4、555定时器·····································10（3）CD4511·········································11（4）CD4001·········································11（5）共阴极数码管···································12（6）MC14553········································12（c）总管脚图···································

5、········12（d）安装················································13（e）测试················································14（1）正弦波电路测试································14（2）正弦波与波形变换电路测试······················14（3）控制电路测试··································15（4）控制电路与单稳态定时电路测试··················15（5）电

6、路整体测试··································16（e）测试方法与技巧······································17（f）调试中出现的故障、原因及排除方法···················18五、Protel电路图及元件清单·······························18（a）元件清单············································19（b）Protel电路图········································19六、

7、实验总结·············································20七、收获和体会···········································20一、题目名称正弦波发生、频率测量显示电路二、设计任务和要求正弦波振荡频率100～1000Hz，输出信号幅度5±5％V；（1）用3位数码管显示振荡频率；（2）能自动连续测量、显示频率，测量周期为4S；（3）用中规模集成电路实现。三、电路及工作原理（a)总体框图及工作原理图1正弦波发生电路组成框图工作原理：正弦波振荡器自激振荡产