基于FPGA和DDS技术的任意波形发生器设计

Design of Random Waveform Generator Based on FPGA and DDS Technique

根据现代电子系统对信号源的频率稳定度、准确度及分辨率越来越高的要求,结合直接数字式频率合成器(DDS)的优点,利用FPGA芯片的可编程性和实现方案易改动的特点,提出了一种基于FPGA和DDS技术的任意波形发生器设计方案。采用VHDL和原理图输入方式,在QuartusⅡ平台下实现该设计的综合和仿真,用Matlab对仿真数据进行处理及显示,验证了设计的正确性。通过设置参数可以灵活控制输出频率和分辨率。

With the higher request on the frequency stability,accuracy and resolution ratio of signal source in modern electronic system,a design method of random waveform generator based on FPGA and DDS technique is introduced for the programmability and easy modification of FPGA chip and the merits of direct digital frequency.This design is described with VHDL,synthesized and simulated with Quartus Π,and displayed the simulated data with Matlab.The results confirmed the validity of the design.It can control the output frequency and resolution ratio agilely by modifying parameter.