GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VII(NEW) EXAMINATION — SUMMER 2019
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Subject Code: 2172408 Date:16/05/2019Subject Name:Advanced Power Electronics Devices & Interface Circuits
Time:02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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Q.1 (a) State applications of WBG materials. 03
(b) State functions of driver circuits. 04
(c) Explain any Non-Isolated Driver ICs used for Half Bridge. 07
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Q.2 (a) State different methods of galvanic isolation. 03
(b) Explain the Hall Effect Current Sensors. 04
(c) Explain the measurement & interfacing of analog signals with Digital System. 07
OR
(c) Explain any DC Current measurement techniques. 07
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Q.3 (a) Draw schematic diagram of isolated linear amplifier. 03
(b) Explain the Linear Opto coupler. 04
(c) Write technical note on differential voltage probe. 07
OR
Q.3 (a) Explain the importance of Grounding for Power Circuits. 03
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(b) Explain the F to V Converter. 04
(c) Explain the Interfacing of Signals Using Galvanic Isolation. 07
Q.4 (a) Explain the Power Scope. 03
(b) Explain the Principle of Frequency Measurement. 04
(c) Explain how a TTL IC-can be interfaced with CMOS IC. Draw interconnection diagrams-also. 07
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OR
Q.4 (a) State various principles used in transducers used for current measurement in industry. 03
(b) What is logic analyzer? State its applications. 04
(c) Explain the Interfacing of Digital Signals with Different Voltage Levels. 07
Q.5 (a) State various logic families. 03
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(b) Explain the Signal Conditioning. 04
(c) It is required to interface a logic signal of 0-24 V with microprocessor. With neat diagram explain interface circuit required for this. 07
OR
Q.5 (a) What is meaning of VOH and VOL voltage levels of logic ICs. 03
(b) Write the Merits and Demerits of WBG materials. 04
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(c) Write technical note on current probe for power electronics. 07
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