MU Elec Circuits & Comm. Fundamentals - December 2012 Exam Question Paper

MU Computer Engineering (Semester 3)
Elec Circuits & Comm. Fundamentals
December 2012

Total marks: --
Total time: --

INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

1(a) Draw equivalent circuit diagram of Op-Amp and explain each term

4 M

1(b) Compare BJT and FET

4 M

1(c) Design practical differentiator for the frequency 5KHz

4 M

1(d) Explain virtual short and virtual ground concept

4 M

1(e) Using practical Op-Amp realize following relation: V₀=2V₁ + 5V₂ + 7V₃ - V₄

4 M

2(a) Explain the Graphical determination of the h parameters using characteristics curves of CE amplifier

10 M

2(b) Determine V_c and V_B for the network shown in figure:

10 M

3(a) Explain the terms CMRR, PSRR

5 M

3(b) For the network shown in figure, determine I_D, V_GS, V_G, V_D, V_S and V_DS

15 M

4(a) Explain any two applications of astable multivibrator using IC 555

10 M

4(b) Design a regulator using LM 723 for V₀=9V and I₀=3 Amps.

10 M

5(a) Draw and explain successive approximation resister type ADC

10 M

5(b) Explain how an Op-Amp can be used as
i. Practical Integrator
ii. Schmitt Trigger

10 M

6(a) Explain Instrumentation Amplifier using Transducer bridge circuit

10 M

6(b) Explain how Op-Amp can be used as summing, scaling and averaging amplifier in Inverting configuration

10 M

7(a) Features of timer

5 M

7(b) PLL

5 M

7(c) Properties of Ideal Op-Amp

5 M

7(d) Zero crossing detector

5 M

7(e) Construction of n-channel JFET

5 M

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