Download GTU B.Tech 2020 Winter 4th Sem 2141002 Analog Circuit Design Question Paper

Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Winter 4th Sem 2141002 Analog Circuit Design Previous Question Paper

Seat No.: ________
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER?IV (NEW) EXAMINATION ? WINTER 2020
Subject Code:2141002 Date:09/02/2021
Subject Name:Analog Circuit Design
Time:02:30 PM TO 04:30 PM Total Marks:56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.

2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.


MARKS
Q.1 (a) Enlist the ideal characteristics of OPAMP.
3

(b) List the parameter those affecting to the transistor at high frequencies.
4

(c) Draw the hybrid model for CE configuration and explain it.
7
Q.2 (a) How op-amp is used as a summing amplifier?
3

(b) What is oscillator? What are the necessary conditions for the oscillations?
4

(c) Derive the expression for the frequency for the RC phase shift oscillator using
7
transistor.
Q.3 (a) List the merits & Demerits of negative feedback.
3

(b) Define the following parameters of Op-Amp: (i) Slew rate (ii) CMRR (iii) Input
4
offset voltage (iv) PSRR

(c) Derive the Avf, Rif, & Rof for Voltage Amplifier.
7


Q.4 (a) Draw the block diagram of OPAMP.
3

(b) Draw the Block diagram of various Feedback topologies and explain the
4
significance of each topology.

(c) For the voltage amplifier AV = 140, fL=200 Hz, fH = 200 KHz, Ri = 2K, Ro =
7
4.7K. When negative feedback is employed in it with = 0.4, determine the
Avf, Rif, Rof, FLH, FHF.
Q.5 (a) What is precision rectifier?
3

(b) Explain the working of a Schmitt trigger using Op-amp.
4

(c) Explain the ideal integrator. What are the problems associated with this
7
configuration? How it can overcome?


Q.6 (a) Explain operation of PLL with basic blocks.
3

(b) Explain instrumentation amplifier.
4

(c) Explain with the circuit diagram and waveforms, the monostable multivibrator
7
using 555 timer.

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Q.7 (a) Classify filter on the basis their frequency response.
3

(b) What is the difference between active and passive filters?
4

(c) Show how Bi-quad circuit can be used as a universal filter?
7


Q.8 (a) Discuss magnitude and frequency scaling in filter design.
3

(b) What do you mean by Voltage regulator? List different types of voltage
4
regulators.

(c) Design and explain the 2nd order low pass Butterworth filter. Derive the equation
7
of gain for the same.


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