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.
出处
《微计算机信息》
2009年第5期67-68,21,共3页
Control & Automation
关键词
直接数字合成
正弦信号发生器
高频
Direct Digital Synthesize
Sine Signal Generator
High Frequency
作者简介
徐正平(1983-),男(汉族),河南许昌人,中国科学院长春光学精密机械与物理研究所硕士研究生,主要研究方向为精密仪器开发。通讯地址:(130033 吉林长春东南湖大路16号长春光机所航测部1426室)