LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PHYSICS

FG 19

FIFTH SEMESTER – APRIL 2008

PH 5401 – ELECTRONICS – II

 

 

 

Date : 06/05/2008                Dept. No.                                        Max. : 100 Marks

Time : 1:00 – 4:00

PART A

Answer all the questions                                 (10 x 2 = 20 marks)

 

1. Give two characteristics of ideal op-amp
2. What are hybrid integrated circuits?
3. What is the advantage of R-2R ladder over weighted resistor D/A converter?
4. Draw the circuit of a non-inverting amplifier
5. What is virtual ground?
6. What are the limitations of IC?
7. What is the difference between SSI and VLSI chips?
8. Distinguish between the instructions SUB B and CMP B
9. What is the function of program counter?
10. When will the auxiliary carry flag be set

 

 

PART B                                            (4 x 7.5 = 30 marks)

Answer any four questions

 

11. Explain the construction of differentiator and integrator using op-amp

1. With a neat diagram explain A/D conversion using voltage to frequency converter
2. Explain the fabrication of monolithic IC
3. Write an assembly language program for picking largest number in an array
4. Explain memory write with bus timing diagram

 

PART C

Answer any four questions                                   (4 x 12.5 = 50 marks)

 

1. Explain the construction and theory of logarithmic amplifier
2. Explain a) parallel A/D converter    (6)

1. b) weighted resistor D/A converter

1.  a) Compare bipolar and MOS technology   (6)

6. b) Explain the IC fabrication of diode (6.5)

 

1. Write the assembly language program for
   1. Multiplying two eight bit numbers
   2. Square root of a perfect square
2. Explain the architecture of 8085 microprocessor

 

 

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