Module – 6 :
1 Explain the operation principle of a FET.
2 Draw and explain the current-voltage characteristics of a FET.
3 Obtain the expression for saturation drain current in a FET.
4 Write short notes on:
(i) MESFET, (ii) MOS Capacitor, (iii) MISFET, (iv) MOSFET.
5 What is ‘Short Channel Effect’ in a FET?
6 What are the differences between BJT and FET?
7 What is ‘pinch-off’ condition in a FET? Derive the expression for pinch-off
8 Sketch the construction of a MOSFET and explain how a channel can be
produced in it. Derive the condition for pinch-off voltage. What is the
threshold voltage in a MOSFET.
9 What do you mean by depletion mode and enhancement mode? Draw the
I-V characteristics of a MOSFET in these two modes
10 Explain the principle of working of ideal MOS capacitor.
11 Derive expression for maximum value of depletion width of a ideal MOS