基于AD9956的任意频率合成器研制

A Random Frequency Synthesizer Developed Based on AD9956 Chip

为满足精密时间测量和高性能星载原子钟等国家重要研究课题的实验应用需求,研制了主要由AD9956芯片和8位高性能单片机构成的一种DDS(直接数字合成)任意频率合成器。在分析DDS的基本原理和特点的基础上,从硬、软件等方面较为详细地介绍了该频率合成器的设计,对同时完成的专用于控制该合成器工作的计算机应用软件也作了介绍。实际使用结果表明:研制的合成器符合实验使用要求,并对促进课题的研究完成发挥了积极作用。

In order to meet the needs of some important research projects such as precise time measurement and high-performance on-board atomic clocks,a DDS（direct digital synthesis） random frequency synthesizer,which is composed mainly of AD9956 chip and 8 bit high-performance SCM（single chip microprocessor）,has been developed.Based on the analyses of the basic principles and characteristics of DDS,the authors made a detailed description of the design of the random frequency synthesizer in both of hardware and software in detail,and the authors also introduced a dedicated application software which is used for computer to control the synthesizer.The experiments show that the frequency synthesizer meets the requirements of the advanced researches and has played an active role in promoting the completion of research project.