介绍了用555定时器构成的单稳态触发器的工作原理，对其功能作了进一步探讨，在此基础上设计了一种具有实用价值的定时-非定时两用开关。
The working principle and the functions of the monostability multivibrator composed of 555 timer are introduced in the paper, and the time switches are designed.
介绍了双闭环可控硅触发器CF 6 B - 2a的工作原理，并将该器件应用于挤塑机主驱动电动机控制系统中。
The working principle of a new double closed-loop thyristor trigger CF6B-2A and its application in the control system of driver motor in the extruder were introduced.
分析了双模前置分频器的工作原理，提出了提高其工作速度的方法，包括给出一种新型高速CMOS动态D触发器的设计以及同步分频器的改进。
Through analyzing its work principle, we find the method to raise the speed: use a novel CMOS dynamic D flip-flop and an improved synchronous frequency divider.
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