中文说明：脉宽调制是一种调制技术，符合的脉冲宽度，脉冲持续时间，基于调制信号的信息。在半导体开关的开关信号是十分必要的，特别是如果需要一个转换器，如DC-DC直流-交流或直流或交流。在这个文件中，有一种使PWM信号进行了分析技术。这个信号在不同的功率转换器的半导体开关可。有使PWM信号的不同的技术，这一技术为基础的电路已设计。
English Description：
pwm is a modulation technique that conforms the width of the pulse, pulse duration, based on modulator signal information. It is very necessary for the switching signal in the semiconductor switches, specially if need to make a converter like dc-dc or dc-ac or ac-dc. In this file, there is a technique to make a pwm singal has been analyzed. By this signal the semiconductor switches in different power converters can be used. There have different technique to make pwm signal, here based one technique the circuit has been dsigned.