›› 2011, Vol. 24 ›› Issue (11): 36-.

• 论文 • 上一篇    下一篇

基于DDS的短波射频频率源设计与实现

施华虎,张灵迪   

  1. (电子科技大学 微电子与固体电子学院,四川 成都 610054)
  • 出版日期:2011-11-15 发布日期:2011-11-25
  • 作者简介:施华虎(1986—),男,硕士研究生。研究方向:射频通信系统。

Design and Implementation of Short-wave Frequency Source Based on DDS Device

 SHI Hua-Hu, ZHANG Ling-Di   

  1. (School of Microelectronics and Solid-State Electronics,University of Electronic Science and Technology of China,Chengdu 610054,China)
  • Online:2011-11-15 Published:2011-11-25

摘要:

介绍了直接数字频率合成(DDS)的结构和原理,并将DDS技术应用于短波射频通信频率源中。实现了一种基于单片机+DDS可编程低噪声频率源,输出信号范围46.5~75 MHz。实验结果表明,该频率源具有频率分辨率高、相位噪声低等优点,满足短波射频通信系统对频率源的设计要求。

关键词: 直接数字频率合成, AD9912, 单片机, 频综源

Abstract:

The structure and principles of direct digital synthesizer (DDS) are introduced,and key technologies of DDS are introduced into the frequency source.A low noise frequency source based on MCU+new DDS device is designed with a range of frequency of 46.5~75 MHz.Some relevant tests are carried out after the frequency source circuit finished.Experiments show that the frequency synthesizer has the features of precise resolution and low phase turning noise.

Key words: direct digital synthesizer;AD9912;MCU;frequency synthesizer

中图分类号: 

  • TN74+