GTU BE/B.Tech 2019 Winter Question Papers || Gujarat Technological University
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Subject Code: 2141002
GUJARAT TECHNOLOGICAL UNIVERSITY
Subject Name: Analog Circuit Design
Date: 07/12/2019
Time: 10:30 AM TO 01:00 PM
Total Marks: 70
Instructions:
Subject Code: 2141002
GUJARAT TECHNOLOGICAL UNIVERSITY
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BE - SEMESTER- IV (New) EXAMINATION - WINTER 2019Subject Name: Analog Circuit Design
Date: 07/12/2019
Time: 10:30 AM TO 01:00 PM
Total Marks: 70
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Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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| Q.1 | (a) What do you mean by Voltage regulator? List different types of voltage regulators. | 03 |
| (b) What are the characteristics of an ideal Op-amp? | 04 | |
| (c) Draw the hybrid p common emitter transistor model. Derive the expression for input conductance. | 07 | |
| Q.2 | (a) Draw and explain block diagram of Op-amp. | 03 |
| (b) How Op-amp can be used as an integrator? | 04 | |
| (c) Explain Op-amp based Zero Crossing Detector with circuit diagram and waveforms. | 07 | |
| OR | ||
| Explain wide band-pass filter with necessary circuit, derivation and waveforms. | 07 | |
| Q.3 | (a) Explain procedure of offset null for Op-amp IC. | 03 |
| (b) What is thermal drift? How does it affect the performance of an Op-amp circuit? | 04 | |
| (c) What is the need of clipper circuit? Explain Op-amp based positive clipper circuit with necessary waveforms. | 07 | |
| OR | ||
| How Op-amp can be used as a summing amplifier? | 03 | |
| Q.4 | (a) Draw block diagram of Phase Locked Loop (PLL) and briefly explain its working. State applications of PLL. | 04 |
| (b) Write short note on: Sample and Hold Circuits. | 07 | |
| (c) Define the terms: (i) CMRR (ii) Slew Rate (iii) Offset voltage. | 03 | |
| Q.5 | (a) Draw Op-amp based two-sided voltage limiter circuit and its response. | 04 |
| (b) Draw and explain triangular and sawtooth wave generator circuit using Op-amp. | 07 | |
| OR | ||
| Design Op-amp based RC phase oscillator for the frequency of 5 KHz. | 03 | |
| Q.5 | (a) What is an oscillator? Explain the concept of oscillation with Barkhausen criteria. | 04 |
| (b) Explain in detail operation of Full wave precision rectifier with circuit diagram and waveforms. | 07 | |
| (c) Draw the circuit of Peak Detectors using Op-amp. | 03 | |
| OR | ||
| Explain the working of Monostable multivibrator using IC 555. | 04 | |
| Explain the working of a Schmitt trigger using Op-amp. | 07 | |
| OR | ||
| Explain voltage-to-Current converter circuit using Op-amp. | 03 | |
| List advantages of Schmitt trigger over the conventional comparators. | 04 | |
| Explain the working of Hartley oscillator. Derive the expression for frequency of oscillation. | 07 |
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