概述了DDS技术的一般原理，详细介绍了由美国AD公司生产的高性能完全正交DDS芯片AD9854的结构、性能及工作原理。最后给出了一个使用该芯片实现雷达回波信号生成系统的应用实例。

At firstly, the principle of DDS technique is briefly summarized in this paper. Then, the structure, function and performance of complete quadrature DDS chip-AD9854 are introduced in detail. At last, application to radar echo generating system based on AD9854 was presented.

TN74 TN957.52