FPGA Implementation of Direct Digital Frequency Synthesizer

Direct digital frequency synthesizer (referred to as DDS) is a kind of complete digital frequency synthesizer. In this article the principle of DDS were introduced. Set the design index of distortion and resolution, and design parameters of DDS in accordance with the index. DDS design describes by Verilog HDL, implement controlling four parameters of the waveform, frequency, phase, amplitude. Using FPGA and Quartus II/Nios IIwhich is Altera EDA software, realize DDS and its peripheral input / output and DA platform. The final direct to DDS simulation results and the overall DDS platform oscilloscope experimental data, verify the correctness of the design of DDS with the two data.