VHDL采用自然采样法写的SPWM，里面有正弦表，可以通过外接输入正弦波和三角波的频率。 -VHDL using written natural sampling SPWM, there are sine table, you can enter through the external sinusoidal and triangular wave frequency.

电子设计竞赛中获二等奖，在FPGA中实现的两路自然采样SPWM，原理图输入法设计，1024*八位正弦查找表，带FSK和ASK调制功能，频率范围8KHz~12KHz.-Electronic Design Competition second prize in the FPGA to achieve the two natural sampling SPWM, schematic design input, 1024* eight sine look-up table, with FSK and A