GTU BE/B.Tech 2019 Winter Question Papers || Gujarat Technological University
Subject Name: Analog Electronics
Time: 02:30 PM TO 05:00 PM
Total Marks: 70
Subject Code: 2130902
GUJARAT TECHNOLOGICAL UNIVERSITY
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BE - SEMESTER- III (New) EXAMINATION — WINTER 2019Subject Name: Analog Electronics
Time: 02:30 PM TO 05:00 PM
Total Marks: 70
Instructions:
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- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
| Q.1 | (a) | Explain the following terms. (1) PSRR (2) Input bias current (3) Input offset Voltage | 03 |
| (b) | Draw the circuit diagram of class B push-pull amplifier & explain its working. | 04 | |
| (c) | List and discuss all ideal characteristics of an Op-Amp. | 07 | |
| Q.2 | (a) | What are the merits and demerits of hybrid parameters? | 03 |
| (b) | Write a short note on cross over distortion. | 04 | |
| (c) | Explain the working of summing amplifier and averaging amplifier when connected in Inverting mode. | 07 | |
| Q.3 | (a) | OR Draw the circuit Op-Amp as a Integrator and explain with necessary waveforms. | 07 |
| (b) | How to rectify stability and high frequency. noise problem in a basic differentiator? | 03 | |
| (c) | Explain the operation of Zero crossingdetector. | 04 | |
| Q.4 | (a) | Draw and explain Wien Bridge Oscillator. | 07 |
| (b) | OR --- Content provided by FirstRanker.com --- Compare the inverting and non-inverting comparators. | 03 | |
| (c) | With the help of circuit” diagram explain the working of Schmitt Trigger. | 04 | |
| Q.5 | (a) | With the help of circuit diagram explain voltage to current convertor with it’s application. | 07 |
| (b) | Define : 1)Pass band 2)Cut of frequency 3)Attenuation | 03 | |
| (c) | Derive the out put voltage equation of basic differentiator. | 04 | |
| (a) | Explain with circuit diagram the operation of VCO. | 07 | |
| (b) | OR Compare Active Filter and Passive Filter. | 03 | |
| (c) | Compare Astable , Monostable and Bistable Multivibrator | 04 | |
| (a) | Draw and explain basic block schematic of 79XX series tree terminal voltage regulator ICs. | 07 | |
| (b) | Explain Butterworth response | 03 | |
| (c) | List advantages and disadvantages of adjustable voltage regulators. | 04 | |
| (a) | Explain the working of IC 555 as a Astable Multivibrator. | 07 | |
| (b) | OR What is the effect of negative feedback on gain & bandwidth? | 03 | |
| (c) | Describe the operation of a LM 317 voltage regulator. | 04 | |
| Explain the working of PLL using appropriate block diagram | 07 |
Date: 30/11/2019
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