Advanced Database Management System - Tutorials and Notes: EC 8303 – ELECTRONICS DEVICES AND CIRCUITS FOR COMPUTER ENGINEERS April May 2014

## B.E (Full Time) DEGREE END SEMESTER EXAMINATIONS, APRIL / MAY 2014, Computer Science and Engineering, Third Semester, EC 8303 – ELECTRONICS DEVICES AND CIRCUITS FOR COMPUTER ENGINEERS

Exam
B.E/B.Tech. (Full Time) DEGREE END SEMESTER EXAMINATIONS
April May 2014
Subject Code

Subject Name

## Electronic Devices and Circuits for Computer Engineers

Branch
Computer Science and Engineering
Semester
Third Semester
Regulation
2012

B.E (Full Time) DEGREE END SEMESTER EXAMINATIONS, APRIL / MAY 2014
Computer Science and Engineering
Third Semester
EC 8303 – ELECTRONICS DEVICES AND CIRCUITS FOR COMPUTER ENGINEERS
(Regulation 2012)
Time : 3 Hours                      Answer A L L Questions                Max. Marks 100
PART-A (10 x 2 = 20 Marks)

1. Determine the current through 7Ω resistor in the circuit shown in Fig. 1
2. Determine the equivalent resistance Rin of the network shown in Fig.2.
3. State superposition principle.
4. State Thevenins theorem.
5. What is Zener effect?
6. Differentiate between EMOS and DMOS transistors.
7. State the advantages of negative feedback in amplifier.
8. Write the p-n junction diode current equation under forward bias condition.
9. Write the salient features of operational amplifier.
10. Draw the circuit of a negative feedback opamp used as an integrator.

PART-B (5x16 = 80 Marks)

11. Determine the current i1 in the circuit shown in Fig.3
12. a. Determine voltage Vx in the circuit shown in Fig.4 using superposition principle. (16)
(OR)
12. b. Determine the maximum power transferred to the load resistor 10Ω shown in Fig.4 using maximum power transfer theorem. (16)
13. a. i. Draw the small signal equivalent circuit of BJT and derive its h-Parameters. (8)
ii. Draw and explain CE configuration of BJT and explain its V-I characteristic. (8)
(OR)
13. b. Explain the principle of operation of MOSFET. Draw its V-I characteristic and explain its various operating regions. (16)
14. a. Explain the principle of operation of common source amplifier and derive its voltage gain. (16)
(OR)
14. b. Explain the principle of operation of common emitter amplifier and derive its small signal voltage gain. (16)
15. a. Derive the gain of inverting and non inverting amplifier using opamp. (16)
(OR)
15. b. Draw the circuit diagram of an ADC using opamp and explain its principle of operation. (16)