摘  要：主要介绍了SA8382单相SPWM发生器与AT89C51单片机的接口电路，控制字的设置及其应用。该系统电路简单可靠，全数字控制，仅改变控制字就可以实现SPWM控制，并通过Multisim 2001对硬件电路进行了仿真。
关键词：单片机；正弦脉宽调制（SPWM）；电路仿真

Abstract:A SPWM control system by a single-chip microcomputer which using SA8382 chip was proposed in this paper,including the control words set and its application.This system has the advantages of simple circuit,full-digital coutrol,it can realize SPWM control easily.Hardware circuit simulated by Multisim 2001 was also given.
Key Words:Single-chip microcomputer；SPWM；Circuit simulation