Considering the characteristics of digital-synthesis technology and pulse signal, this paper proposes a method to implement the adjustment of high-speed pulse using differential amplifier.

结合数字合成脉冲的技术特点及信号特征，提出利用恒流源差分放大电路具有非线性工作区的特点实现高频脉冲信号调理的方法。

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The high-speed twin arc pulse GMAW welding technology possesses the advantages of high efficiency, high quality and automatization, and is paid much more attention to nowadays.

双电弧共熔池脉冲gmaw焊集高速高效、优质和自动化于一体，近来备受重视，但国内对此研究不多。

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The average flux of the PWM high-speed on-off valve are regulated by the Pulse-Width Modulation theory and it is easy to combine the computer and hydraulic control technology.

高速开关阀采用脉宽调制(PWM)原理来控制其平均流量，极易实现计算机控制技术和液压技术的有机结合。

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