基于FPGA的任意波形发生器的设计与实现

Design and Implementation of Arbitrary Waveform Generator Based on FPGA

提出了一种基于FPGA(现场可编程门阵列)采用DDS(直接数字频率合成器)技术的任意波形发生器设计方案。该方案的硬件电路以FPGA为核心器件,辅以D/A转换器、程控放大和人机接口电路构成。其中FPGA内部控制电路采用8051单片机软核为核心进行设计,信号合成电路采用VHDL语言设计数控振荡器实现,低通滤波器为采用窗函数法设计的16阶线性FIR数字滤波器。

The design of an Arbitrary Waveform Generator （AWG） based on Direct Digital Synthesis technique and FPGA is proposed in this paper. The circuit hardware core device is FPGA and is supplemented by D/A converter, program-controlled amplifier and man-machine interface circuit. The control circuit in FP- GA adopts 8051 soft-core. Signal synthesis circuit is implemented with Numerically Controlled Oscillators based on VHDL. The low-pass filter is a 16 order linear FIR digital filter designed by window function.