Solve any one question fromQ.1(a,b) and Q.2(a,b)

1(a)
Draw and explain the construction and working of N-channel JFET.

6 M

1(b)
Explain the following non-ideal V-I characteristics of MOSFET:

i) Finite output resistance

ii) Subthreshold conduction

iii) Breakdown effects.

i) Finite output resistance

ii) Subthreshold conduction

iii) Breakdown effects.

6 M

2(a)
Determine the operating point (I

!mage

_{DQ}, V_{DSQ}) of the JFET circuit as shown if figure (1). Calculate R_{S}!mage

6 M

2(b)
Draw the constructional diagram of Nchannel E-MOSFET and give drain and transfer characteristics for the same with necessary parameters.

6 M

Solve any one question fromQ3(a,b) and Q.4(a,b)

3(a)
For the circuit digram shown in Fig.2, determine the g

!mage.

_{m},A_{v}, R_{i}, R_{o}.!mage.

8 M

3(b)
Write short note on constant current source using MOSFET.

4 M

4(a)
Explain the BiCMOS technology with suitable diagram.

6 M

4(b)
Explain how MOSFET can be used as Active resistor in VLSI circuits.

6 M

Solve any one question fromQ5(a,b) and Q.6(a,b)

5(a)
Draw the different types of feedback topologies and compare their input and output impedances.

8 M

5(b)
Give the Barkhausen criterion and draw any LC oscillator circuit.

5 M

6(a)
For the circuit digram shown in Fig.3, determine the G

r

!mage.

_{mf}, A_{vf}, R_{if}, R_{of}. Assume: g_{m}= 1.6 mA/Vr

_{d}= 25 kΩ!mage.

8 M

6(b)
Differentiate RC and LC oscillator and draw RC phase shift oscillator using FET.

5 M

Solve any one question fromQ.7(a,b) and Q.8(a,b)

7(a)
Draw and explain block diagram of adjustable positive three terminal voltage regulator.

8 M

7(b)
Compare linear regulator and SMPS.

5 M

8(a)
Explain SMPS using suitable block diagram.

7 M

Solve any one question fromQ.1(a,b,c) and Q.2(a,b,c)

8(b)
Design an adjustable voltage using LM317 for output voltage 5-15 volts and draw necessary connection diagram (Assume R

_{1}= 240Ω and I_{adjustable = 100 μA).}
6 M

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