摘要
直接数字频率合成(DDS)技术具有频率分辨率高、转换速度快的优点。首先介绍了DDS的工作原理,然后分析了DDS的输出频谱以及改善杂散的方法,最后给出了DDS技术在信号产生中的应用设计方案,详细讨论了FPGA器件在基于DDS技术的任意波形发生器中的应用,并给出了实现波形数据压缩的VHDL程序。结果表明该系统操作灵活,可靠性高,易于实现。
Direct digital frequency synthesis technology has the advantages of high frequency resolution and fast frequencyhopping rate. Firstly, the paper introduces the working principle of DDS,and then analyzes the output spectrum of DDS and the methods for improving spur. Finally the design scheme of DDS technology applied in the signal generation is given, and the application of FPGA device in arbitrary waveform generator based on DDS technology is discussed in detail and the VHDL programs for compressing waveform data are given. The result indicates that the system has flexible operation and good reliability,and has been implemented easily,so it can meet the peopler＇s continual elevated requires.
出处
《现代电子技术》
2006年第21期54-56,共3页
Modern Electronics Technique
