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Q. Show the Enhancement operation of p-channel enhancement mosfet?
As the gate terminal is insulated from the channel by the silicon dioxide layer, we can also apply a negative voltage at the gate with respect to the source ( GS v ). The application of the negative voltage at the gate with respect to the source pulls more holes into the channel which, in fact, results in the widening of the channel and increasing its conductivity. This, in turn, increases the drain current. The drain current continues to increase as GS v becomes more and more negative. Since the negative gate voltage increases (enhances) the channel's conductivity, the P-DFET is said to operate in its enhancement mode when the gate voltage is negative with respect to the source voltage.In summary, a p-channel DFET can be operated in its depletion mode as a p-channel JFET or in its enhancement mode. There, of course, is no such thing as the enhancement mode operation of a P-JFET.
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