The first switch circuit is coupled to the electrical level translator and turns off the fourth transistor when the third transistor is turned on.
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。
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.
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。
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