基于AD9852的基准源设计  

Design of signal source based on AD9852

作　　者：智国宁[1] 刘金川[1] 

机构地区：[1]北京航天测控技术开发公司,北京100041

出　　处：《国外电子测量技术》2009年第8期67-69,73,共4页Foreign Electronic Measurement Technology

摘　　要：针对传统模拟方式实现基准源设计存在相位噪声特性差、杂散(spur)多、谐波抑制比低等缺点,本文提出了基于DDS的基准源的硬件电路及工作原理。该基准源是由FPGA控制DDS及其外围电路,产生频率、幅度均可控的正弦波。并进一步论述了如何实现AM调制。试验测试表明,该电路性能稳定,可以为射频应用提供基准源功能。The traditional signal source mostly based on analog mode, there are some disadvantages such as high phase noise, high spur, low harmonic restraint. This paper mainly introduces the hardware circuit and working principle of the signal source,which is controlled by FPGA, can produce sine wave. The frequency and amplitude of the sine wave can be controlled by th4 FPGA. Furthermore, a method of AM function is offered for RF application.

关 键 词：直接数字频率合成 AD9852 AM 

分 类 号：TP39[自动化与计算机技术—计算机应用技术]