The resistor must also be rated high enough to meet the power dissipation requirements while the zeners are conducting.
2
第一开关电路耦 接至电平转换器，并在第三晶体管导通时，关闭第四晶体管。
The first switch circuit is coupled to the electrical level translator and turns off the fourth transistor when the third transistor is turned on.
3
而第二开关电路耦接至电平转换器，并在第一晶体管导通时，关闭第二晶体管。
While the second switch circuit is coupled to the electrical level translator and turns off the second transistor when the first transistor is turned on.
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