Pulse width Modulation device is a circuit which can produce square wave signal with fixed period and adjustable pulse duration ratio (pulse width).
脉宽调制器是一种能够产生周期固定而占空比(脉宽)可调的方波信号的电路。
The control device creates driving voltage output every time. One driving voltage has duration, called a pulse width.
控制仪每次输出一位的驱动电压，一个驱动电压持续时间，称为脉冲宽度。
The clinic research indicates that the pulse energy, pulse width and duration time can influence the surgical effect directly.
临床研究表明：脉冲能量、脉冲宽度、辐射持续时间等激光参数直接影响到手术效果的好坏。
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