以下为句子列表：
英文: A novel current control mode pulse width modulation switched high frequency resonant arc igniting device is developed based on UC3842 and the principle is analyzed.
中文: 摘要采用UC3842设计了电流控制型脉宽调制开关式高频振荡引弧器，并对其工作原理进行了分析。
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英文: Abstract: In this paper, we describe the design and function, application of the power unit controller for mini RF excited CO2 laser, pulse width modulation (PWM) is the convenient way to vary the laser average output power from 1%to 100%of maximum.
中文: 文摘:述了小型RF激励CO2激光器的功率控制器设计、功能和应用，根据脉宽调制原理可以方便地把激光功率从1%变化到100%。
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英文: High-speed on-off valves are used and controlled with pulse width modulation (PWM) in this system.
中文: 系统应用高速开关阀，用脉宽调制(PWM)的方法进行控制。
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