1、 I 信号源的设计和制作 学生：XX 指导教师：XX 内容摘要：本文介绍了信号发生器的基本原理以及工作流程，在电子信息技术 领域， 经常要用到一些信号作为测量基准信号或输入信号， 也就是所谓的信号源。 信号源的好坏在很大程度上决定了系统的性能，因而常称之为电子系统的“心 脏” 。随着电子技术的发展，对信号源的要求越来越高，要求其输出频率高达微 波频段甚至更高，及频率分辨率达到 m 级 Hz 甚至更小，相应频点数更多，频率 转换时间达到 ns 级，频谱纯度高，同时对频率的功耗、体积、重量等也有更高 的要求。要实现高性能的信号源，必须在技术手段上有新的突破。针对以上对信 号源高性能的要求，研究和制
2、作一款频率和分辨率更高、转换时间更少、频谱纯 度更高的信号发生器成为了人们广泛关注的焦点。而基于 DDS 技术的产品，可以 很好的达到上述各项性能的要求， 为当今科技更好更快发展提供了有效的设备基 础，正是在这样的背景下，高精度的信号发生器应运而生。 关键词：信号发生器 频率歩进 占空比 II Signal source design and productionSignal source design and production Abstract:Abstract: This article describes the basic principles and workflow of th
3、e signal generator, in the field of electronic information technology, often use some of the signal as a measurement of the reference signal or input signal, but also the so-called source. The quality of the signal source to a large extent determine the performance of the system, often called the “h
4、eart“ of the electronic system. With the development of electronic technology, the signal source to the output frequency up to even higher microwave frequency bands and frequency resolution of mHz or even smaller, the corresponding frequency points more frequency switching time of the ns-level high
5、spectral purity, frequency power, volume, weight, have higher requirements. To achieve high-performance signal source must be a new breakthrough in technology means. The above performance requirements of the source, research and production of a frequency and a higher resolution, less conversion time
6、, higher spectral purity of the signal generator has become the focus of widespread concern. DDS technology-based products can be good to achieve the above performance requirements of todays technology better and faster development of equipment, it is in this context, high-precision signal generator came into being. Keywords:Keywords: Signal generator Frequency of stepper Duty cycle . III 目 录 前言 1 1 方案论证. 1 1.1 波形产生 . 1 1.1.1 正弦波产生 2 1.1.2 方波产生 2 1.2 幅度调整 . 2 2 主要电路设计与计算. 2 2.1 系统原理总图 .
