在很多测试应用中，二极管的电压和发出的光可以利用大小固定的电流源同时测出来。
In many test applications, the voltage and light output of the diode can be measured simultaneously using a fixed source current value.
输出电压是直接认识到由光耦合器u2和齐纳二极管VR2。
Output voltage is directly sensed by optocoupler U2 and Zener diode VR2.
输出电压是直接认识到由光耦合器u2和齐纳二极管VR2。
Output voltage is directly sensed by optocoupler U2 and Zener diode VR2.
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