Anna University Chennai B.E Electronics & Communication Engineering Linear integrated circuits 2010 Question paper

PART-A
(20*2=40MARKS)
ANSWER ALL QUESTIONS

1. Mention the advantages of ICs over discrete components?

2. What is the use of buried n + layer in Monolithic IC transistor?

3. Define Sheet resistance.

4. What are the two common methods for obtaining integrated capacitors?

5. Draw the circuit of Op amp as clamper

6. Define band-pass filter

7. Write transfer function of op amp as integrator

8. Define comparator and also draw its transfer characteristics

9. Briefly explain analog multiplication process.

10. What is Schmitt trigger? Mention its application.

11. Define FSK modulation

12. Define Lock-in-Range and capture range of PLL.

13. Draw the transfer characteristics of a 3-bit DAC

14. Calculate the values of the LSB,MSB and full scale output for an 8-bit DAC for the 0 to 10V range

15. Give the disadvantage of flash type A/D converter

16. Which is the fastest ADC and why?

17. Write the frequency of oscillation(f0) equation for triangular wave generator

18. How frequency to voltage converted in OP AMP.

19. Define monolithic switching regulator

20. What do you mean by opto-coupler?


PART-B
(5*12=60 MARKS)
ANSWER ANY FIVE QUESTIONS

21. a) Explain in detail about Widlar current source 8
b) Briefly explain about slew rate of an op-amp 4

22. a) Discuss in detail about the AC performance characteristics of an op-amp 8
b) What is current mirror? Explain. 4

23. a) How op amp can be used as an antilog amplifier? 6
b) Explain about op-amp integrator 6

24. a) Discuss in detail about Gilbert multiplier cell 6
b) With neat block diagram explain the operating principles of PLL 6

25. a) Explain in detail about Voltage controlled oscillator 8
b) Describe the application of PLL as AM detection 4

26. a) Explain the operation of successive approximation type A/D converter 8
b) What output voltage would be produced by a D/A converter whose output range is 0 to 10V 4 and whose input binary number is (1) 10(for a 2-bit D/A converter) (2) 0110(for a 4-bit DAC)?

27. a) With neat diagram explain the operation of instrumentation amplifier 8
b) Design an inverting summing amplifier using op-amp 4

28. a) Explain the operation of a op-amp 8
b) Write short notes on operation on function generator 4