›› 2013, Vol. 26 ›› Issue (9): 127-.

• 论文 • 上一篇    下一篇

基于DDS的多功能高精密信号发生器设计

林冲锋,梁龙学,索云天   

  1. (兰州交通大学 电子与信息工程学院,甘肃 兰州 730070)
  • 出版日期:2013-09-15 发布日期:2013-09-25
  • 作者简介:林冲锋(1986—),男,硕士研究生。研究方向:智能化仪器仪表。E-mail:lcf123117@163.com

Design of Multi-function High-precision Signal Generator Based on DDS

LIN Chongfeng,LIANG Longxue,SUO Yuntian   

  1. (School of Electronic and Information Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)
  • Online:2013-09-15 Published:2013-09-25

摘要:

信号发生器是现代电子测量中不可或缺的工具之一,广泛应用于通信、测量、雷达控制等领域。文中基于DDS技术,提出了一种以AD9854为核心的信号发生器设计方法。该设计通过PC机和控制台软件设置输出信号参数,结合单片机对频率控制字进行处理,可产生正弦波、方波以及FSK、ASK等多种调制波形,输出频率最高可达150 MHz,频率分辨率达1 μHz。实验结果表明,该设计具有功能全、精度高、可编程性好等优点。

关键词: 信号发生器, 直接数字频率合成(DDS), AD9854, 单片机

Abstract:

The signal generator is an indispensable tool in the modern electronic measuring,and widely used in the field of communication,measurement and radar control.This paper puts forward a signal generator design method based on DDS technology.The design sets signal parameters by PC and processes the frequency control word by MCU,and then produces sine,square,FSK,ASK and other modulation waveforms.The output frequency is up to 150 MHz and the frequency resolution is 1 μHz.Experimental results show that the design has the advantages of full-function,high-precision and excellent programming capability.

Key words: signal generator;DDS;AD9854;MCU

中图分类号: 

  • TN74