STUPIDSID
Attempt any four:
1 (a)
Draw Input and Output characteristics of BJT in common emitter configuration.
5 M
1 (b)
Draw small signal hybrid π equivalent circuit for npn transistor.
5 M
1 (c)
Explain effect of temperature on JFET and derive equation for zero current drift.
5 M
1 (d)
Calculate IB, IC & VCE for common emitter circuit.
5 M
1 (e)
Find IB, IC & VCE for following circuit.
5 M
2 (a)
Draw output waveform for clamper and clipper circuits.
(i)
(ii)
10 M
2 (b)
Explain construction & characteristics of n channel Enhancement MOSFET. Draw transfer characteristics & drain characteristics.
10 M
3 (a)
For JFET amplifier shown below, Calculate Av, Zi, Zo.
10 M
3 (b)
For the circuit shown below, calculate IDQ & VDSQ. It is given that ID(ON)=6 mA, VGS(ON)=8V. Vth=3V.
10 M
4 (a)
Explain the working of Wein Bridge Oscillator. Derive the expression for frequency of oscillation for sustained oscillations.
10 M
4 (b)
Calculate voltage gain of FET amplifier.
Yos=40μs
IDSS=8mA
VGS off=-4V
10 M
5 (a)
Draw & explain energy band diagram of MOS capacitor operating in
i) Accumulation
ii) Depletion
iii) Inversion mode
i) Accumulation
ii) Depletion
iii) Inversion mode
10 M
5 (b)
Draw emitter follower circuit and derive an expression for voltage gain Av.
10 M
6 (a)
Draw circuit diagram for phase shift oscillator & derive an expression for frequency of oscillation.
10 M
Write short notes on any two:
6 (b) (i)
Photodiodes
5 M
6 (b) (ii)
LC Oscillators
5 M
6 (b) (iii)
Transistor as a switch
5 M
6 (b) (iv)
Schottky diode
5 M
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