Design of arbitrary waveform generator based on DDS and FPGA

Abstract：In order to meet with the development of the modern electric technology and market requirements, it is necessary and significant to study the high performance arbitrary waveform generator.Based on the theory of DDS, the digital part realized by FPGA chip EPIC3T144C8 in DDS structure and its interface with MCU are designed with Quartus II.The waveform RAM of DDS is the sink of arbitrary waveform data.Based on this, taking advantage of PC's powerful calculate and display capability, the operate panel of AWG with Lab Windows/CVI is developed.On the panel, user can choose conventional waves such as sine wave, square wave, triangle wave, saw tooth wave etc., draw wave required by testing by hand, and set wave parameters to bring waveform data and control instrument generate corresponding waveform.Drawing wave and bringing corresponding data is the emphasis and difficulty in the design, which embodies the "arbitrary" character of AWG.

Keyword：arbitrary waveform generator;DDS;FPGA;Lab Windows/CVI;