LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.Sc. DEGREE EXAMINATION – COMPUTER SCIENCE
THIRD SEMESTER – NOVEMBER 2010
PH 3106 / CS 3101 – APPLIED ELECTRONICS
Date : 10-11-10 Dept. No. Max. : 100 Marks
Time : 9:00 – 12:00
PART A
ANSWER ALL QUESTIONS 10 x 2 = 20
- What is doping in extrinsic semiconductor?
- What is a depletion layer?
- What is the output voltage of a summing amplifier when V1 = 2V, V2 = 1V, R1 = 10 kΩ ,
R2 = 10 kΩ , Rf = 10 kΩ. - Differentiate analog and digital signals.
- Write a short note on program counter.
- What is a Flip flop?
- Find the complement of .
- Draw the block diagram of a T-Flip flop using JK Flip flop and give its truth table
- Simplify using K – map Y = F(A,B) = Σ (1,2,3 )
- Define Hit ratio.
PART B
ANSWER ANY FOUR QUESTIONS 4 x 7.5 = 30
- Write short notes on (i) intrinsic semiconductor (ii) extrinsic semiconductors (iii) PN junction diode
- Explain the working of an OP-AMP inverting amplifier with a circuit diagram.
- With a neat diagram and truth table discuss the working of a Johnson’s counter
- Explain the working of a full adder with circuit diagram and truth table
- (a) Differentiate between ROM and RAM (2)
(b) Explain various types of ROM (5.5)
PART C
ANSWER ANY FOUR QUESTIONS 4 x 12.5 = 50
- Describe the operation of a NPN transistor in common emitter mode. Obtain the input and output characteristics for the same.
- Explain with circuit diagram, the working of an op-amp based 4 bit R-2R ladder D/A converter.
- (a) Simplify using K – map Σ (0,2,5,7,8,9,10,11,12,13,14,15) (8.5)
(b) Show that (4)
- (a) Explain the shift left shift register with a neat diagram (6.5)
(b) Explain the working of a D-Flip flop with its truth table (6)
- (a) Explain in detail the timing and control in a basic computer. (6)
(b) Explain the various components in memory hierarchy (6.5)