Design and Implementation of DDS Signal Generator Based on FPGA

A new technology named Direct Digital Synthesis( DDS) was applied on a FPGA chip to design a waveform generator. It can generate periodic waveform whose frequency,phase and amplitude were adjustable. Moreover,the waveform generator with DDS has the function of frequency and phase adjustment,so no additional circuit was needed. During the amplitude modulation design,the characteristics of reference voltage of the D /A Converter were used.