电子系统设计创新与实践设计报告-程控信号发生器设计

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1、电子系统设计创新与实践设计报告题目：程控信号发生器设计院（系）：专业班级：学生姓名：学号：同组成员：指导老师：职称：设计方案（30分）样机测试（40分）设计报告（30分）总分2012年月目录1概述11.1题目名······················································21.2功能和技术指标要求··········································21.3国内外相关情况概述······························

2、············21.3.1波形发生器的发展状况···············································21.3.2国内外波形发生器产品比较···········································31.3.3本课题在国内外的发展状况···········································42技术方案······················································

3、·············52.1波形产生原理················································52.2总体技术方案················································52.3方案论证·······································································63硬件设计···········································

4、··············73.1波形产生电路···············································73.2电源电路···················································83.3单片机电路·················································94软件设计·························································134.1软

5、件功能说明···············································134.2软件总流程·················································134.3各功能软件·················································155附录一····························································186心得················

6、··············································20第一章概述1.1题目名程控信号发生器设计正弦信号发生器作为电子技术领域中最基本的电子仪器，广泛应用于航空航天测控、通信系统、电子对抗、电子测量、科研等各个领域中。随着电子信息技术的发展，对其性能的要求也越来越高，如要求频率稳定性高、转换速度快，具有调幅、调频、调相等功能，另外还经常需要两路正弦信号不仅具有相同的频率，同时要有确定的相位差。摘要在信号发生器的设计中,传统的用分立元件或通用数字电路元件设计电子线路的方法

7、设计周期长,花费大,可移植性差。本设计是用直接数字频率合成器(DDS),设计出正弦波、矩形波、三角波、锯齿波信号，这四种信号发生器输出信号的频率范围皆为：10-100KHz，频率误差范围:-1%～1%。与传统的频率合成方法相比，DDS合成信号具有频率切换时间短、频率分辨率高、相位变化连续等诸多优点。使用单片机灵活的控制能力与FPGA器件的高性能、高集成度相结合，可以克服传统DDS设计中的不足，从而设计开发出性能优良的DDS系统。关键词：单片机，直接数字频率合成，低通滤波、1.2功能和技术指标要求（1）输出电压

8、：交流24V（2）输出波形：①连续矩形波，频率10—100kHZ可调，幅值可调①连续正弦波，频率10—100kHZ可调，幅值可调②连续锯齿波，频率10—100kHZ可调，幅值可调③连续三角波，频率10—100kHZ可调，幅值可调④单个正弦波，每按一次输出开关输出一个正弦波，周期时间，幅值可调⑤单个矩形波，每按一次输出开关输出一个矩形波脉冲，波脉冲的宽度、周期时间，幅值可调⑥单个三角波，每按一次输出开