基于FPGA的信号源设计，100M时钟，32位相位累加，能产生正玄波、方波，三角波，锯齿波，频率可调，频率范围0.03HZ-15MHZ。-FPGA-based signal source design, 100M clock, 32-bit phase accumulation can produce sine wave, square wave, triangle wave, sawtooth, adjustable frequency, the frequency range 0.03 Hz