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Electronic Devices and Circuits

Q1:

In which n type device does p substrate extend upto silicon dioxide layer?

A JFET

B Depletion type MOSFET

C Enhancement type MOSFET

D Both (b) and (c)

ANS:C - Enhancement type MOSFET

The given answer (C) is absolutely correct. Because. In Enhancement Mosfet 'N' channel is absent between two heavily doped n+ regions. So, p substrate extends up to sio2 layer (presence of N channel between two doped regions is the main difference between depletion and enhancement MOSFET)



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