基于DDS技术的高频正弦波发生器的设计  

Design of High Frequency Sine Signal Generator Based on DDS

作　　者：徐正平[1,2] 翟林培[1] 田雅男[3] 张宏巍[1,2] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,长春130033 [2]中国科学院研究生院,北京100039 [3]东北师范大学物理学院,长春1300247

出　　处：《微计算机信息》2009年第5期67-68,21,共3页Control & Automation

摘　　要：以混合信号单片机C8051F020及DDS芯片AD9834为核心,采用直接数字合成(DDS)技术完成多功能高频正弦信号发生器的设计。该正弦信号发生器可输出可调频稳定正弦信号,频率最高可达15MHz,频率步进为100Hz、1KHz、10KHz三级步进,在50欧姆电阻负载情况下输出电压峰峰值在2.54V至10.40V之间;同时可以产生模拟调幅(AM)信号、模拟调频(FM)信号、二进制ASK、PSK、FSK信号。其中:AM信号的调制度可以10%步进调节,FM信号最大频偏可以在5KHz/10KHz之间选择。The high frequency sine signal generator,which is based on the technology of Direct Digital Synthesize （DDS）,is designed by making use of C8051F020 and AD9834.The sine signal generator could produce steady sine signal with frequency up to 15MHz, while the frequency could be regulated in step of 100Hz, lKHz or 10KHz. When the load resister is 50 ohm,the peak value of the sine signal generator is between 2.54 volt and 10.40 voh.In this system,AM,FM,BASK,BPSK and BFSK are also produced.The modulation of AM could be regulated in step of 10%,and the biggest biased frequency of FM could be selected between 5KHz and 10KHz.

关 键 词：直接数字合成 正弦信号发生器 高频 

分 类 号：TP33[自动化与计算机技术—计算机系统结构]