这是一个用EP2C5T144的FPGA制作的DDS信号发生器，输出信号波形可变，幅度可调，缺点是信号频率略低，带有电路图-This is a used EP2C5T144 FPGA produced DDS signal generator, the output signal waveform variable adjustable amplitude, the disadvantage is that the signal frequency is slightly lower, with