Viva Voce Questions Ee8461.docx

Viva Voce Questions

1. What is Integrated Circuit? 2. What is a Logic gate? 3. What are the basic digital logic gates? 4. What are the gates called universal gates? 5. Why NAND and NOR gates are called universal gates? 6. What are the properties of EX-NOR gate? 7. What is variable mapping? 8. Define Demorgans theorem. 9. What do you mean by don’t care functions? 10. State two absorption properties of Boolean function. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. 34. 35. 36. 37. 38. 39. 40. 41. 42. 43. 44. 45. 46. 47.

What are the two methods of Boolean function minimization? What is a combinational circuit? What is different between combinational and sequential circuit? What are the gates involved for binary adder? List the properties of Ex-Nor gate? What is the expression for sum and carry in half and full adder?

What is parity bit? Why parity bit is added to message? What is parity checker? What is odd parity and even parity? What are the gates involved for parity generator? List the procedures to convert gray code into binary? Why weighted code is called as reflective codes? What is a sequential code? What is error deducting code? What is ASCII code? How the output line will be activated in decoder circuit?

What are the necessary steps for implementing higher order decoders? What is the use of code converters? How to convert BCD to Decimal decoder? What is seven segment displays? What is the other name of encoder? What is encoding? What are the applications of encoder? What is BCD encoder? What is the other name of de-multiplexer? Compare MUX and DE-MUX? How many select lines needed for four outputs of DE-MUX? What is other name of multiplexer? What is serial to parallel converter? What is the use of select lines? How to enable the multiplexer? What are the applications of multiplexer? What is register? What are the modes of shift register? How ring counter is implemented using shift registers? Compare parallel and serial sub registers?

48. 49. 50. 51. 52. 53. 54. 55. 56. 57. 58. 59. 60. 61. 62. 63. 64. 65. 66. 67. 68.

Define sequence generator? What are the types of shift register? Define shift registers. Compare synchronous and asynchronous sequential circuits? What is a ripple counter? What is propagation delay in ripple counter? Define MOD counter? What are the applications of counters? State the types of counter? Define bit, byte and word. Define address of a memory. What is a parallel counter? What is the speed of a synchronous counter? Define Offset voltage. Define duty cycle. Mention the applications of IC555. Give the methods for obtaining symmetrical square wave. What is the other name for monostable multivibrator? Explain the operation of IC555 in astable mode.. Why negative pulse is used as trigger? What do you mean by linear circuits?

69. Define an IC? 70. What is an inverting amplifier? 71. What is the type of feedback employed in the inverting op-amp 72. What is a voltage follower? 73. Define a non-inverting amplifier? 74. Give the closed loop gain of an inverting amplifier? 75. What is the gain of a non-inverting amplifier? 2. What is integrator? 3. Write the disadvantages of ideal integrator? 4. Write the application of integrator? 5. Why compensation resistance is needed in integrator and how will you find it values? 6. What is differentiator? 7. Write the disadvantages of ideal differentiator. 8. Write the application of differentiator? 9. Why compensation resistance is needed in differentiator and how will you find it values? 10. Why integrators are preferred over differentiators in analog comparators? 1.