用FPGA实现直接数字频率合成

Direct Digital Synthesis (DDS) using FPGA

用FPGA实现直接数字频率合成在成本和灵活性方面比购买专用DDS更具优势,本文介绍了利用XILINX的FPGA器件(2S100-TQ144)实现直接数字频率合成器的工作原理、设计思路及电路实现方法。并对DDS的杂散来源作出定性分析,给出了实验结果。

Designing DDS (direct digital synthesizers) with FPGA combine the advantages of the cost and agility. The research and design of digital frequency synthesizer by FPGA chip 2S100 - TQ144 of xilinx Inc are discussed in this article. At last it analyzes the spurious signal and lists the main test output spectrum of DDS.