A design method of using GAL to make a constant current source is introduced, proving a new method of current stabilization by means of driving regulated transformer by a controlling device.

主要介绍以可编程门阵列器件构成恒流源核心控制电路的设计思路，通过机电自控装置驱动可调变压器实现新的稳流方法，实验证明这一方法是可行的。

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Cascade JFET constant current device is of very high dynamic impedance.

串级JFET恒流器件具有非常高的动态阻抗。

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The charging technique with L-C constant-current converter is adopted, and the repeated charging and discharging process of the device is controlled by voltage feedback.

研制了一种检测氧化锌避雷器阀片的重复频率充放电装置，采用L C恒流充电技术，通过电压反馈法控制充放电运行过程。

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