基于FPGA的DDS设计

Design of direct digital synthesizer based on FPGA

利用现场可编程门阵列(FPGA)设计并实现直接数字频率合成器(DDS)。结合DDS的结构和原理,给出系统设计方法,并推导得到参考频率与输出频率间的关系。DDS具有高稳定度,高分辨率和高转换速度,同时利用Altera公司FPGA内的Nios软核设置和显示输出频率,方便且集成度高。

This design uses field programmable gate array （FPGA）to realize direct digital synthesizers （DDS）.Commbining the DDS＇s structure and principle,system design methods are given,and the relationships between reference frequency and output frequeucy are dcduced.DDS has a high stability,higb resolution anti high conversion speed,using Altera Nios softcore sets up and displays the output frequency,which is very convenient,and has a higher degree of integration.