To design and manufacture a constant-source with adjustable amplitude value and the test system, and to realize the examination of zener diode voltage drift parameter, is very important.

设计制作出一个幅值可调的恒流源及其测试系统，实现稳压二极管电压漂移参数的检测，至关重要。

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In this circuit, some measures are adopted, such as making constant current source as a rectifying load. It makes the voltage drop of the rectifying diode maintain a constance.

该电路采取以恒流源为整流负载等有关措施，使整流二极管的正向导通压降为一常数。

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