基于FPGA的直接数字频率合成器设计

本文将FPGA器件和DDS技术相结合,确定了FPGA器件的整体设计方案。笔者利用FPGA器件规模大、设计灵活方便的特点,分析研究了用FPGA器件实现DDS系统的方法,并对其关键技术进行了优化处理,采用流水线结构的相位累加器设计和FPGA内嵌的波形存储器设计,在Quartus II软件中采用基于硬件描述语言（VHDL）的自顶向下的设计方法来完成仿真实验。

Design of Direct Digital Frequency Synthesizer Based on FPGA

Combining the FPGA device with the DDS technology,the design scheme of the FPGA device is described in this paper.The FPGA device has the features of large in scale and design flexible,the method of implementing DDS system based on the FPGA device is analyzed,and the key technology is optimized,including pipeline structures of phase accumulator and the embed waveform memory of FPGA.The simulation experiment is completed using VHDL with the top-down design methods in Quartus II software.