STUPIDSID
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 (IDQ, VDSQ) of the JFET circuit as shown if figure (1). Calculate RS
!mage
!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 gm,Av, Ri, Ro.
!mage.
!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 Gmf, Avf, Rif, Rof. Assume: gm= 1.6 mA/V
rd= 25 kΩ
!mage.
rd= 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 R1 = 240Ω and I adjustable = 100 μA).
6 M
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