Pandian Saraswathi Yadav Engineering College

Pandian Saraswathi Yadav Engineering College

Madurai-Sivagangai Highway, Arasanoor-630561

Question Banks

Department : Electrical and Electronics Engineering

Subject code & Subject Name : EE6303& Linear Integrated Circuits and

Applications

Semester : III

Name of the faculty member : M.MAHESWARAN

UNIT-I

IC FABRICATION

PART-A

1.  What are the advantages of ion implantation technique?

2.  List out the steps used in the preparation of Si – wafers.

3.  What is the principle of Photolithography?

4.  What is Photolithography?

5.  What is hybrid IC?

6.  What is monolithic IC?

7.  What are the popular IC packages available?

8.  Why aluminum is preferred for metallization?

9.  What is the purpose of oxidation?

10.  Write down the various processes used to fabricate IC’s using silicon planar technology.

11.  Mention the advantages of integrated circuits.

12.  Advantage of integrated circuits over discrete circuits.

13.  State any two advantages of MOS technology over bipolar technology in the fabrication of IC.

14.  What are all the IC classification?

15.  Define packaging.

16. Define etching and diffusion?

17. Name the different types of IC packages.

18. What is meant by dielectric isolation in IC fabrication?

19. Name the parameters which govern the thickness of the flim in the oxidation process.

20.  What is the step taken to avoid material defeat in ion implantation?

PART-B

1. With neat diagram explain the steps involved in the fabrication of the circuit shown in figure using IC technology.

2. Explain in detail about monolithic IC technology

3. Write notes on

i. epitaxial growth

ii.Masking & Etching Process.

4. Explain how a monolithic capacitor can be fabricated.

5.  Explain how a monolithic Diode can be fabricated.

UNIT-II CHARACTERISTICS OF OPAMP

PART-A

1.  Define slew rate.

2.  What causes slew rate?

3.  Why IC 741 is not used for high frequency applications?

4.  What are the merits and demerits of Dominant-pole compensation?

5.  Mention the frequency compensation methods.

6.  What is the need for frequency compensation in practical op-amps?

7.  In practical op-amps, what is the effect of high frequency on its performance?

8.  What do you mean by a band-gap referenced biasing circuit?

9.  What are the limitations in a temperature compensated zener-reference source?

10.  Define sensitivity.

11.  Mention the advantages of Wilson current source.

12.  What is the advantage of widlar current source over constant current source?

13.  Justify the reasons for using current sources in integrated circuits.

14.  What are the applications of current sources?

15.  Define CMRR of an op-amp.

16.  Define input offset current. State the reasons for the offset currents at the input of the op-amp.

17.  Define input offset voltage.

18.  What happens when the common terminal of V+ and V- sources is not grounded?

19.  Mention the characteristics of an ideal op-amp.

20.  Define an operational amplifier.

21.  What is practical op-amp & draw the equivalent circuit.

22.  Draw the circuit of a voltage follower using op-amp and prove that its gain is exactly equal to units.

23.  Define CMRR.

24.  Draw an integrator using op-amp.

25.  Draw an adder circuits using operational amplifer to get the output experssion Vo=-10.1v+V2+5V3

26.  List any four characteristics of an ideal op-amp.

27.  Write short notes on virtual short and virtual ground.

28.  What are the advantages of using feedback?

29.  State the application of op-amp.

PART-B

1. Explain in detail of a basic differential amplifier. (16)

2. Draw the circuit diagram of op-amp differentiator, integrator and derive an expression for the output in terms of the input. (16)

3. Explain in detail about voltage series feedback amplifier. (16)

4. Derive the gain of inverting and non-inverting. (16)

5. Explain and derive the condition for DC-characteristics of an operational amplifier. (16)

UNIT-III APPLICATIONS OF OPAMP

PART-A

1.  State the advantages of dual slope ADC:

2.  What is the main drawback of a dual-slop ADC?

3.  Where are the successive approximation type ADC used?

4.  What are the main advantages of integrating type ADCs?

5.  Explain in brief the principle of operation of successive Approximation ADC.

6.  What is integrating type converter?

7.  List out some integrating type converters.

8.  List out the direct type ADCs.

9.  List the broad classification of ADCs.

10.  List the applications of OTA

11.  What are the merits of companding?

12.  What is a compander IC? Give some examples.

13.  Mention some typical applications of PLL:

14.  Discuss the effect of having large capture range.

15.  What is the purpose of having a low pass filter in PLL?

16.  Define Voltage to Frequency conversion factor.

17.  On what parameters does the free running frequency of VCO depend on?

18.  What is a voltage controlled oscillator?

19.  What are the problems associated with switch type phase detector?

20.  What is a switch type phase detector?

21.  Give the classification of phase detector:

22.  Define Pull-in time.

23.  Define capture range of PLL.

24.  Define lock-in range of a PLL.

25.  What are the three stages through which PLL operates?

26.  List the basic building blocks of PLL

27.  Mention some areas where PLL is widely used.

28.  What is the difference between a sawtooth wave and triangular wave?

29.  State important features of an instrumentation amplifier.

30.  Name of two analog to digital converters.

31.  Define resolution of DAC

32.  What is the most important application of schmitt trigger circuit?

33.  Write short notes on a.c. amplifiers.

34.  State the requirements of good instrumentation amplifier.

35.  Explain OP-AMP is used as a summing amplifier.

PART-B

1. Explain the working of an instrumentation amplifier with a circuit. Give its characteristics and applications (16)

2. Explain the working of any one of sinusoidal oscillators. (16)

3. Explain the working of schmit trigger. (16)

4. Explain the R-2R ladder type DAC. (16)

5. Explain how a comparator can be used as a zero crossing detector. (16)

6. Draw the circuit of a first order and second order butter worth active low pass filter and derive its transfer functions. (16)

UNIT –IV SPECIAL ICs

PART-A

1.  Give the classification of voltage regulators:

2.  What is a voltage regulator?

3.  List the applications of 555 timer in Astable mode of operation:

4.  List the applications of 555 timer in monostable mode of operation:

5.  List the applications of 555 timer in Astable mode of operation:

6.  List the applications of 555 timer in monostable mode of operation:

7.  Mention some applications of 555 timer:

8.  Draw the Pin digram of IC 555.

9.  What is meant by delta modulation?

10.  Define sample period and hold period.

11.  What is a sample and hold circuit? Where it is used?

12.  What is multiplying DAC?

13.  What is monotonic DAC?

14.  What is meant by linearity?

15.  Explain in brief stability of a converter:

16.  What is settling time?

17.  Define accuracy of converter.

18.  Define resolution of a data converter.

19.  Define conversion time.

20.  Define capture range of PLL.

21.  Name two application of PLL.

22.  Draw the pin diagram of IC555 timer.

23.  In a monostable multivibrator using 555timer R=100kΏ and time delay is 100ms Find the value of c.

24.  What is a two-quadrant multiplier.

PART-B

1. Explain the functional block diagram of 555timer. (16)

2. Explain working of PLL using suppropriate block diagram and explain any one application of the same. (16)

3. Draw the block diagram of an Astable multivibrator using 555timer and derive an expression for its frequency of oscillation. (16)

4. Draw the block diagram of monostable multivibrator using 555timer and derive an expression for its frequency of oscillation. (16)

5. write short notes on

i) capture range ii) Lock in range

iii) Pull in time (16)

UNIT-V APPLICATION ICs

PART-A

1.  Mention the advantages of opto-couplers:

2.  What is an opto-coupler IC? Give examples.

3.  What is the advantage of switching regulators?

4.  Give the drawbacks of linear regulators:

5.  What is meant by current limiting?

6.  Define load regulation.

7.  Define line regulation.

8.  What is the purpose of having input and output capacitors in three terminal IC regulators?

9.  Give some examples of monolithic IC voltage regulators:

10.  What are the advantages of IC voltage regulators?

11.  What is opto coupler

12.  What is a linear voltage regulator?

13.  How the current boosting is achieved in a 723 Ic.

14.  What is noise

15.  Name a timer IC and a voltage regulator IC.

16.  Derive ripple rejection with respect to voltage regulator.

17. Define line regualation.

18. What is the function of a series pass transistor in a voltage regulator?

19.  Design a low voltage regulator using 723 for 5v and explain its characteristics

20.  .Give the classification of tuned amplifier

21.  .What is an isolation amplifier?

22.  What is the need for a tuned amplifier?

PART-B

1. Explain i) Oscillation amplifier.

ii) Voltage regulator (16)

2. Draw and explain the functional block diagram of a 723 regulator. (16)

3. Draw the block diagram of the function generator in IC 8038 (or) any other equivalent and explain its operation. (16)

4. Write an explanatory note on opto-couplers. (16)

5. Explain in detail about the 380 power amplifier. (16)