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- 脉冲宽度调制又称PWM调制(PWM技术)，脉冲载波的脉冲持续时间(脉宽)随调制波的样值而变的脉冲调制方式，简称脉宽调制。-Pulse width modulation PWM modulation (PWM), also known as the pulse duration of pulse carrier (pulse width) along with the sample values of modulation wave pulse modulation mode, abbreviat