LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.Sc. DEGREE EXAMINATION  PHYSICS
FIFTH SEMESTER  NOVEMBER 2004
PH 5401 / PHY 401 – ELECTRONICS II
DATE : 01.11.04
TIME :1.00 – 4.00
Max. : 100 Marks
Time : 3 Hrs
PART A
Answer all questions
(10 X 2 = 20)
1. Calculate the voltage gain of a non-inverting amplifier with feedback resistance of 20
k and input resistance of 1 k.
2. State any four properties of an ideal op-amp.
3. Define the terms i) Resolution ii) linearity of A/D converter.
4. Find the analog output voltage of a 3 bit D/A converter for all possible inputs with K
= 1.
5. Distinguish between discrete and integrated components.
6. Define various scales of integration of integrated circuit.
7. What is an instruction cycle?
8. What is machine cycle?
9. Tabulate the role of status lines of INTEL 8085.
10. Write an assembly language program to add two 8 bit numbers.
PART B
Answer any four
(4 X 7.5 = 30)
11.
12.
13.
14.
Set up a circuit to solve the simultaneous equations x + 2 y = 3; 2x + 3y = 5.
Explain the functioning of successive approximation A/D converter.
Write note on monolithic and thin film process used in the fabrication of IC’s
Discuss the functioning of the following
i)IO/M
ii) INTR
iii)INTA iv)HOLD
v)HLDA
vi) READY
vii) RD
15. Classify 8085 instruction in various groups. Give an example of each.
PART C
Answer any four
(4 X 12.5 = 50)
16. Explain the functioning of i) logarithmic amplifier and ii) Integrator.
17. With a neat circuit diagram, explain the working of an op-amp based binary
weighted D/A Converter.
18. Explain with a neat diagram how i) a resistor ii) a transistor and
iii) a diode is
fabricated in an integrating circuit.
19. Draw the block diagram of INTEL 8085 and explain the same in detail.
20. Discuss the various types of addressing modes of INTEL 8085 with suitable
examples.