A unipolar SPWM controlling circuit based on SG3525 is introduced.It includes that sampling circuit, reference circuit, SPWM pulse forming circuit, coding and delay and driving circuit.

• 摘要： 介绍了一种基于SG3525的单极性SPWM控制电路，其中包括取样电路、基准电路、SPWM 脉冲形成电路、编码延时驱动电路。