一种基于DDS的宽带频率合成的设计  

Design of a wideband frequency synthesis based on DDS

作　　者：杨政[1] 

机构地区：[1]中国电子科技集团公司第四十一研究所,安徽蚌埠233006

出　　处：《电子设计工程》2011年第12期63-65,共3页Electronic Design Engineering

基　　金：国家科技重大专项TD-LTE无线综合测试仪表开发(2009ZX03002-009)

摘　　要：针对高性能DDS芯片AD9858设计宽带频率合成器,分析DDS的工作原理,给出宽带频率合成器的原理框图和实现过程,并对软件控制流程进行了详细说明,结合理论对系统的相位噪声和杂散性能做了简要分析和计算,最后获得测试结果验证了基于AD9858宽带频率合成器有较好的相位噪声和杂散,达到了预期的目标。Aiming at a high performance DDS chip AD9858,a wideband frequency synthesis is introduced in this paper.The working principle of DDS is analyzed The principle block diagram and implementation process of this wideband frequency synthesis are given and software control flow is introduced.The phase noise and spurious performance of this system is also analyzed shortly.The test result shows that the wideband frequency synthesis has good phase noise and superior performance and reaches the desire design requirement.

关 键 词：直接数字频率合成 AD9858 YTO 鉴相 

分 类 号：TN74[电子电信—电路与系统]