GTU BE/B.Tech 2019 Winter Question Papers || Gujarat Technological University
Subject Code: 2172408
GUJARAT TECHNOLOGICAL UNIVERSITY
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BE - SEMESTER- VII (New) EXAMINATION — WINTER 2019
Date: 28/11/2019
Subject Name: Advanced Power Electronics Devices & Interface Circuits
Time: 10:30 AM TO 01:00 PM
Instructions:
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- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
| Q.No. | Question | Marks |
|---|---|---|
| Q.1 (a) | State applications of WBG materials. | 03 |
| Q.1 (b) | Why do semiconductors have a band gap? | 04 |
| Q.1 (c) | Compare WBG (Sic or GaN) with Silicon based power electronics. | 07 |
| Q.2 (a) | State different methods of galvanic isolation. | 03 |
| Q.2 (b) | State functions of driver circuits. | 04 |
| Q.2 (c) | Explain the any Non-Isolated Driver ICs used for Half Bridge Rectifier. OR --- Content provided by FirstRanker.com --- Explain the Hall Effect Current Sensors & Linear Opto coupler. | 07 |
| Q.3 (a) | State various principles used in transducers used for current measurement in industry. | 03 |
| Q.3 (b) | Enlist isolated and non-isolated driver ICs. | 04 |
| Q.3 (c) | Explain the Interfacing of Signals Using Galvanic Isolation. OR Discuss Gate Drive Requirements Of High-Side Devices. | 07 |
| Q.4 (a) | Write short note on Current Transformer. | 03 |
| Q.4 (b) | Explain why isolation of field signal is required? Explain any one method of isolating field signals with neat diagram. | 04 |
| Q.4 (c) | Draw Analog to Digital converter circuit. | 07 |
| Q.5 (a) | State various logic families. | 03 |
| Q.5 (b) | Explain how a TTL IC can be interfaced with CMOS IC. Draw interconnection diagrams also. | 04 |
| Q.5 (c) | OR Draw any one scheme for interfacing slow field signal with microprocessor. | 07 |
| Q.6 (a) | What is logic analyzer? State its applications. | 03 |
| Q.6 (b) | Write technical note on current probe for power electronics. | 04 |
| Q.6 (c) | What is meaning of VOH and VOL voltage levels of logic ICs. | 07 |
| Q.7 (a) | Write short note on Grounding for Power Circuits. | 03 |
| Q.7 (b) | Explain single switch driver IC without SC protection. | 04 |
| Q.7 (c) | OR Explain requirement of Isolation Amplifier. | 07 |
| Q.8 (a) | Compare CRO with DSO. | 03 |
| Q.8 (b) | Write technical note on differential voltage probe. | 04 |
| Q.8 (c) | 07 |
Total Marks: 70
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