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Seat No.:
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Enrolment No.
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER-IV (NEW) EXAMINATION — WINTER 2020
Subject Code:2141002 Date:09/02/2021
Subject Name:Analog Circuit Design
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Time:02:30 PM TO 04:30 PM Total Marks:56
Instructions:
- Attempt any FOUR questions out of EIGHT questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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Q.1
(a) Enlist the ideal characteristics of OPAMP. [N
(b) List the parameter those affecting to the transistor at high frequencies. [N
(c) Draw the hybrid π model for CE configuration and explain it.
Q.2
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(a) How op-amp is used as a summing amplifier?
(b) What is oscillator? What are the necessary conditions for the oscillations?
(c) Derive the expression for the frequency for the RC phase shift oscillator using transistor.
Q.3
(a) List the merits & Demerits of negative feedback.
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(b) Define the following parameters of Op-Amp: (i) Slew rate (ii) CMRR (iii) Input offset voltage (iv) PSRR
(c) Derive the Avt, Rir, & Ror for Voltage Amplifier.
Q.4
(a) Draw the block diagram of OPAMP.
(b) Draw the Block diagram of various Feedback topologies and explain the significance of each topology.
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(c) For the voltage amplifier Av = 140, f1=200 Hz, fy = 200 KHz, R; = 2KQ, R, = 4.7KQ. When negative feedback is employed in it with g = 0.4, determine the Avt, Rif, Rof, Fru, Fur.
Q.5
(a) What is precision rectifier?
(b) Explain the working of a Schmitt trigger using Op-amp.
(c) Explain the ideal integrator. What are the problems associated with this configuration? How it can overcome?
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Q.6
(a) Explain operation of PLL with basic blocks.
(b) Explain instrumentation amplifier.
(c) Explain with the circuit diagram and waveforms, the monostable multivibrator using 555 timer.
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Q.7
(a) Classify filter on the basis their frequency response.
(b) What is the difference between active and passive filters?
(c) Show how Bi-quad circuit can be used as a universal filter?
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Q.8
(a) Discuss magnitude and frequency scaling in filter design.
(b) What do you mean by Voltage regulator? List different types of voltage regulators.
(c) Design and explain the 2nd order low pass Butterworth filter. Derive the equation of gain for the same.
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This download link is referred from the post: OU B.Com, BA, B.sc And BBA Languages English, Hindi, Telugu and Urdu 2021 Important Question Bank || Osmania University (Important Questions)