摘要
直接数字频率合成(DDS)是频率合成领域中的一项新技术。本文简要介绍了DDS工作原理及其特性,详细阐述了应用DDS技术和单片机控制技术、选用AD9851芯片研制一台高分辨率、高稳定度和较高纯度信号源的工程实现方法,给出了系统主要硬件电路、频率控制字传送程序以及抑制杂散的方法。本设计结构简单,拓展性好;人机交互界面友好,数据输入简单、可靠;电磁兼容设计合理,保证了仪器性能稳定。
The direct digital synthesis （DDS） is a new technology in the field of frequency synthesis. This paper briefly introduces the working principle and characteristics of DDS. Then it particularly expatiates on the engineering method of developing a signal source of high frequency resolution, high stability and high purity, using the technology of DDS and singleehip, and presents the main circuit of system hardware, a program of frequency control word transmission and a method of spurious reduction . The design has a simple architecture, a good expanding performance , a nicer interface for interacting with the instrument that makes data input simple and dependable, a reasonable electromagnetism compatible design that ensures the stability of the signal source.
出处
《江苏技术师范学院学报》
2005年第6期48-53,共6页
Journal of Jiangsu Teachers University of Technology
