Design and Simulation of Multi-modal Signal Generator

This paper proposes a frequency-adjustable signal generator based on Xilinx FPGA and uses Verilog language to realize long-range waveform output and adjustment through UART serial communication interface. The design realizes sine wave, triangle wave, square wave and other waveforms. The output design analyzes the principle and advantages of using FPGA to implement Direct Digital Synthesis (DDS). The main indicators reach 14-bit data width and 1024-bit depth ROM meter output, and the frequency adjustable output range is 1Hz-100MHz. And through the oscilloscope display and Vivado simulation tools for simulation waveform verification, the system meets the design requirements.