A Method on Realizing Signal Generator for Arbitrary Waveform

This paper discussed a method to realize the arbitrary waveform generator.By using the theory of DDS and the FPGA programming technology,it can realize the whole system and the design of the waveform RAM in sequence on a FPGA chip. Controlled by single-chip computer for display and frequency and phase setting,PC using Lab Windows/CVI software is designed, the arbitrary waveform data download to the waveform RAM through the serial port,arbitrary waveform of the output is realized. After testing,this system can be output sine wave by step as 10Hz,frequency range of 0.01Hz~30M Hz,and frequency stability better than 10-7.The proposed method to realize the arbitrary waveform generator in this paper is simple,cost-effective,high frequency resolution,and high frequency converting speed.And the phase of DDS system output waveform is continuous with the frequency conversion.