MOS晶体管没有导电沟道为什么还会有电流
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MOS晶体管没有导电沟道为什么还会有电流
As the value of the drain-source voltage is further increased,the assumption that the channel voltage is larger than the threshold all along the channel ceases to hold.This happens when VGS - V(x) < VT.At that point,the induced charge is zero,and the conducting channel disappears or is pinched off.No channel exists in the vicinity of the drain region and the current ID remains constant (or saturates).Please explain why the current can keep constant instead of being zero while the conducting channel has already disappeared?
As the value of the drain-source voltage is further increased,the assumption that the channel voltage is larger than the threshold all along the channel ceases to hold.This happens when VGS - V(x) < VT.At that point,the induced charge is zero,and the conducting channel disappears or is pinched off.No channel exists in the vicinity of the drain region and the current ID remains constant (or saturates).Please explain why the current can keep constant instead of being zero while the conducting channel has already disappeared?
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