LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

   B.Sc. DEGREE EXAMINATION – PHYSICS

FIFTH SEMESTER – NOVEMBER 2010

PH 5404 / 5401 – ELECTRONICS – II

 

 

 

Date : 09-11-10                     Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

PART A

ANSWER ALL QUESTIONS                                                                                            10 x 2 = 20

1. Draw the output waveform of an integrator for a square wave input.
2. Draw the circuit diagram of a second order high pass filter.
3. For a 5 bit R-2R ladder D/A converter, calculate the output for a digital input of 10101. Assume 0 = 0V and 1 = 5V.
4. Differentiate between analog and digital signals.
5. Give any four advantages of integrated circuits.
6. Write a short note on linear IC’s.
7. What is direct addressing mode? Explain with example.
8. Write a short note on DAA instruction.
9. What do pins ALE, HLDA denote in microprocessor 8085?
10. What is the output of the following program?

MVI A, 03;     RLC;   RLC;   ADI, 01;          HLT

PART B

ANSWER ANY FOUR QUESTIONS                                                                               4 x 7.5 = 30

11. Solve the following differential equation using operational amplifiers.

d²y/dt² + 2dy/dt + 3y – 1 = 0.

12. With a neat diagram explain the working of a counter type A/D converter.
13. Discuss in detail the classification of IC’s based on their structure.
14. Write an assembly language program to determine the square root of a given number by indirect mode of addressing.
15. Write a short note on arithmetic and logical instructions.

PART C

ANSWER ANY FOUR QUESTIONS                                                                               4 x 12.5 = 50

16. What is instrumentation amplifier? Explain it with a neat diagram (5)
17. Explain in detail an Op-Amp based monostable multivibrator with a neat diagram. (7.5)
18. Explain with circuit, the working of an op-amp based 4 bit binary weighted D/A converter.
19. For a 5 bit binary weighted resistor D/A converter network, determine the following
    (i) output voltage when LSB is set. (ii) Output voltage for 11010 (iii) Full scale voltage. Assume 0 = 0V and 1 = 10V. (6)
20. Explain the fabrication of a bipolar transistor and explain how a bipolar transistor can be used as a diode.
21. Write a short note on the different registers in microprocessor 8085. (5).
22. Write an assembly language program to solve the given equation (x+y)/z by indirect mode of addressing. (7.5).
23. Write an assembly language program to sort the given set of 10 numbers in ascending order.

 

 

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