电子系统设计创新与实践设计报告-程控信号发生器设计.docVIP

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 1 1.1 题目名······················································2 1.2 功能和技术指标要求··········································2 1.3 国内外相关情况概述··········································2 1.3.1波形发生器的发展状况···············································2 1.3.2国内外波形发生器产品比较···········································3 1.3.3本课题在国内外的发展状况···········································4 2 技术方案···································································5 2.1 波形产生原理················································5 2.2 总体技术方案················································5 2.3 方案论证·······································································6 3 硬件设计·························································7 3.1 波形产生电路···············································7 3.2 电源电路···················································8 3.3 单片机电路·················································9 4 软件设计·························································13 4.1 软件功能说明···············································13 4.2 软件总流程·················································13 4.3 各功能软件·················································15 5 附录一····························································18 6 心得······························································20 第一章 概述 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0-100KHz，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