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2. 在栅极与源极之间施加正极性电压(栅极-源极电压:V GS )

3. 因此,电子被吸引至栅极绝缘膜下的P层,P层变为N层(变成N层的P层被称为“ 反转层”)

4. 由于上述第3条中所述的反转现象,MOSFET的所有区域变成N层(从漏极侧:“N+”-”N-”-” 反转层(N)”–“N+”)

5. 因此,MOSFET用作电阻器,漏极电流由施加的VDS和负载流决定。