EE2254 — LINEAR INTEGRATED CIRCUITS AND APPLICATIONS question papers with solution four years huge collection

B.E./B.Tech. DEGREE EXAMINATION, APRIL/MAY 2010

Fourth Semester

Electrical and Electronics Engineering

EE2254 — LINEAR INTEGRATED CIRCUITS AND APPLICATIONS previous year collections

(Regulation 2008)

(Common to Instrumentation and Control Engineering and Electronics and

Instrumentation Engineering)

Time: Three hours Maximum: 100 Marks

Answer ALL Questions

PART A — (10 × 2 = 20 Marks)

1. What is the purpose of oxidation process in IC fabrication?

2. What is parasitic capacitance?

3. List any four characteristics of an ideal OP-Amp.

4. Design an amplifier with a gain of –10 and input resistance of 10 k .

5. Define slew rate and state its significance.

6. An 8 bit DAC has a resolution of 20mV/bit. What is the analog output voltage

for the digital input code 00010110 (the MSB is the left most bit)?

7. Draw the pin diagram of IC 555 timer.

8. Mention any two application of multiplier IC.

9. List the important parts of regulated power supply.

10. What are the advantages of switch mode power supplies?

PART B — (5 × 16 = 80 Marks)

11. (a) Explain the basic processes used in silicon planar technology with neat

diagram.

Or

(b) Discuss the various methods used for fabricating IC resistors and

compare their performance.

12. (a) (i) Explain the functions of all the basic building blocks of an Op-Amp.

(8)

(ii) Explain the application of OPAMP as (1) integrator

(2) differentiator. (8)

Or

(b) Find 0V of the following circuit.

13. (a) Design and explain triangular wave generator using Schmitt trigger and

integrator circuit.

Or

(b) (i) Explain the operation of dual slope ADC. (8)

(ii) Explain the following characteristics of ADC resolution, accuracy,

settling time, linearity. (8)

14. (a) With neat block diagram, explain IC566 VCO operation and discuss any

two applications.

Or

(b) What are the modes of operation of IC555? Derive the expression of time

delay of a monostable multivibrator.

15. (a) With a neat diagram, explain working principle of switch mode lower

supply.

Or

(b) Write brief notes on:

(i) IC MA 78 40

(ii) Optocoupler.

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UNIT – I

PART – A

1. Define electric motor.
2. Define electric generator.
3. Define excitation.
4. What are the methods of excitation?
5. What do you mean by self excited machine?
6. What do you mean by separately excited machine?
7. State the function of commutator.
8. What do you mean by commutation?
9. What is the purpose of brushes?
10. By which material yoke can be manufactured?
11. Why the brushes are made upon carbon?
12. What are the types of self excited generator?
13. Define shunt generator.
14. Define series generator.
15. Define compound generator.
16. Draw the open circuit characteristics of dc separately excited generator.
17. What do you mean by magnetization curve?
18. Draw the load characteristics of separately excited dc generator.
19. Draw the characteristics for DC shunt generator.
20. Draw the characteristics of DC series generator.
21. Draw the characteristics of DC compound generator.
22. What is the principle of operation of dc generator?
23. Write down faradey's law of electromagnetic induction.
24. What is the principle of operation of DC motor?
25. State lenz's law.
26. How Lenz's law is helpful for the operation of DC motor?
27. Write the significance of back e.m.f.
28. Define back e.m.f.
29. Write the e.m.f. equation of DC generator.
30. Write down the voltage equation of DC motor.
31. Write the torque equation of DC motor.
32. Draw the characteristics of DC shunt motor.
33. Draw the characteristics of DC series motor.
34. Draw the characteristics of DC compound motor.
35. Differentiate differentially compound and cumulatively compound motor.
36. What are the applications of DC shunt motor?
37. What are the applications of DC series motor?
38. What are the applications of DC compound motor?
39. Why shunt motor is called as constant speed machine?
40. Why starter is needed in DC motor?
41. What is the advantage of 4 point starter over 3 point starter?
42. State the function of no volt coil.
43. State the function of over load release.
44. What is the advantage of conducting Swin-burne's test?
45. Draw the diagram of ward-leanord system of speed control.
46. By which method, we can control the speed of the motor below the base speed?
47. By which method, the speed control of the DC motor be above the base speed?
48. What are the various methods of speed control of DC motor?
49. Differentiate armature voltage control method and field flux control method.
50. What do you mean by brake test?

PART – B

51. Explain in detail the constructional details of DC machine.
52. Derive the e.m.f. equation (8)
53. Draw and explain the characteristics of DC generator.
54. Derive the torque equation/
55. Write down the significance of back e.m.f.
56. Write down the principle of operation of DC motor.
57. Draw and explain the characteristics of DC motor.
58. Draw and explain 3 point starter.
59. What is the draw back in 3 point starter and how it is overcome in 4 point starter?
60. Explains the procedure of swin burne's test.
61. Draw and explain the speed control methods of DC shunt motor.
62. Explain in detail about the ward-leonard system of speed control of DC motor.
63. Problem.

UNIT – II

PART – A 

1. State the principle of operation of transformer.
2. What are the types of transformer according to its construction?
3. Differentiate core type transformer and shell type transformer.
4. Write down the e.m.f equation of transformer.
5. Write down the transformation ratio.
6. Define magneting current component.
7. Define working current component.
8. Draw the vector diagram of transformer an no load.
9. How the resistance of the secondary be referred in the primary?
10. Draw the approximate equivalent circuit of the transformer.
11. Draw the vector diagram for the transformer under resistive load.
12. Draw the vector diagram for the transformer under inductive load.
13. Draw the vector diagram of the transformer under comparative load.
14. When the transformer is said to be ideal?
15. Define voltage regulation of transformer.
16. Define voltage regulation up.
17. Define voltage regulation down.
18. By conducting no load test, which losses can be found out?
19. Which losses can be found out by conducting short circuit test?
20. What are the tests to be conducted on the transformer?

PART - B

1. Derive the e.m.f. equation of transformer.
2. Explain in detail about the transformer on no load.
3. Draw and explain ideal transformer. Draw its vector diagram.
4. Obtain the equivalent circuit of the transformer by conducting suitable tests.
5. Draw and explain in detail about the transformer an load.
6. Derive the regulation formula for the transformer.
7. Explain in detail about the testing procedures for the transformer.
8. Problem.

UNIT – III

PART – A 

1. Write the working principle of induction motor.
2. How RMF is produced with the help of 3 phase supply?
3. Define slip.
4. Write the working principle of 3f induction motor.
5. Why 3f induction motor is called as rotating transformer?
6. Can the rotor speed of induction motor be synchronous speed?
7. What are the types of induction motor?
8. Write down the torque equation of 3f induction motor.
9. Draw the slip-torque characteristics.
10. Draw the speed-torque characteristics.
11. State the relation between P₂, P_c and P_m.
12. Draw the Power flow diagram of 3 phase induction motor.
13. Draw the equivalent circuit of 3 f induction motor.
14. Why starter is necessary in AC induction motor?    
15. What are the types of starters available to start 3 f induction motor?
16. Why single phase induction motor is not self starting?
17. How single phase induction motor is made to start?
18. How the rotor is classified in 3f induction motor?
19. How Rmf is produced in the stator of the induction motor
20. What is Rmf?

PART - B

1. Explain the constructional details of 3 f induction motor.

2. How Rmf is produced with the help of 3 f AC supply?

3. Explain in detail the principle of operations of 3 phase induction motor.

4. Explain the procedure to obtain the equivalent circuit of 3 phase induction motor.

5. Derive the torque equation of 3 phase induction motor.

6. Draw and explain the characteristics of 3 phase induction motor.

7. Explain in detail about (i) Star-delta starter (ii) Auto transformer starter (iii) DOL starter.

8. Write short notes on single phase transformer.

9. Why single phase induction motor is not self starting? Explain the methods available to start the motor.

10. Write short notes on speed control of 3 f induction motor.

UNIT IV

PART – A 

1. What are the types of synchronous machines?
2. What is the basic principle of operation 3f alternator?
3. Why stationary armature is there in 3f alternator?
4. Write down the e.m.f. equation of alternator.
5. What are the types of 3 f alternator?
6. Define voltage regulation of alternator?
7. What are the methods to find out voltage regulation?
8. Why synchronous impedance methods is called as pessimistic method?
9. What are the methods to find out voltage regulation
10. Why synchronous impedance method is called as pessimistic method?
11. Define synchronous impedance.
12. Why ampere-turns method is called as optimistic method?
13. Draw the phasor diagram for voltage regulation in synchronous impedance method.
14. How emf is induced in brushless alternator?
15. What is the function of rotating diode assembly in brush can alternator?
16. What do you mean by brushless excitation?
17. How reluctance motor is running?
18. What is the operating principle of hysteresis motor?
19. What are the types of stepper motor?
20. How do you find step angle in stepper motor?
21. Give the application of stepper motor.

PART - B

22. Derive the emf equation of alternator.
23. Write down the procedure of finding voltage regulation of alternator using synchronous impedance method.
24. Write down the procedure for finding voltage regulation using ampere-turns method.
25. Explain in detail the construction of synchronous machine.
26. Write short notes on (i) Brushless alternator (ii) Reluctance motor (iii) Hysteresis motor (iv) Stepper motor.

UNIT – V

PART – A

1. What are the various sources of electric power generating system?
2. What is the purpose of step up transformer in electrical power system?
3. What do you mean by carona loss?
4. What is meant by Ferranti effect?
5. What are the advantages of AC transmission?
6. What are the advantages of DC transmission?
7. What are the types of distribution system?
8. What is EHUAC?
9. Define EHUDC.
10. What is the purpose of circuit breakers.
11. Define insulators.
12. Why the transmission is done through under ground cable?
13. What are the advantages of under ground cables?
14. What are the types of under ground cables?
15. What are types of insulators?
16. What is pin insulator? Where it is used?
17. What is stay insulator? Where it is used?
18. What are the purposes of insulator?
19. Define service mains.
20. Define grid.
21. Differentiate feeders and distributors.

PART - B

1. Explain in detail, the single line diagram of electrical power system.
2. Explain in detail the various types of transmission and distribution systems.
3. Distinguish EHUAC and EHUDC systems.
4. Explain in detail the substation lay out.
5. Write short notes as (i) Insulators (ii) cables.

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DIGITAL LOGIC CIRCUITS QUESTION BANKS FOR EEE

anna university question bank for eee, EEE FOURTH,DIGITAL LOGIC CIRCUITS, QUESTION BANKS, ANNA UNIVERSITY QUESTION BANKS FOR ECE, ECE FOURTH, EEE, ECE, 


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DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING

DIGITAL LOGIC CIRCUITS

YEAR : II

SEMESTER : IV

---

UNIT - I

BOOLEAN ALGEBRA & COMBINATIONAL CIRCUITS

---

PART-A
1) What is meant by parity bit?
2) What are registers?
3) What is meant by register transfer?
4) Define binary logic?
5) Define logic gates?
6) Define duality property.
7) State De Morgan’s theorem.
8) Reduce A.A’C.
9) Reduce A (A + B).
10) Reduce A’B’C’ + A’BC’ + A’BC.
11) Reduce AB + (AC)’ + AB’C (AB + C).
12) Simplify the following expression Y = (A + B) (A + C’) (B’ + C’).
13) Simplify the following using De Morgan’s theorem.
14) Show that (X + Y’ + XY) (X + Y’) (X’Y) = 0.
15) Prove that ABC + ABC’ + AB’C + A’BC = AB + AC + BC.
16) Convert the given expression in canonical SOP form Y = AC + AB + BC.
17) Convert the given expression in canonical POS form Y = (A + B)(B + C)(A + C).
18) Find the minterms of the logical expression Y = A’B’C’ + A’B’C + A’BC + ABC’
20) Write the maxterms corresponding to the logical expression Y = (A + B + C’)
21) Convert (4021.2)5 to its equivalent decimal.
22) What are called don’t care conditions?
23) Write down the steps in implementing a Boolean function with levels of NAND Gates?
24) Give the general procedure for converting a Boolean expression in to multilevel NAND diagram?
24) What are the basic digital logic gates?
26) What is a Logic gate?
27) Which gates are called as the universal gates? What are its advantages?

---

PART-B
1. Design a 4-bit binary adder/ subtractor circuit.
a) Basic equations. (4)
b) Comparison of equations. (4)
c) Design using twos complement Circuit diagram. (8)
2. Design a half adder using NAND – NAND logic. (16)
3. Explain how a full adder can be built using two half adders. (16)
4. Design a half adder using at most three NOR gates. (16)
5. Using 8 to 1 multiplexer, realize the Boolean function
T = f(w, x, y, z) = Σ(0,1,2,4,5,7,8,9,12,13) (16)
6. Design a 8421 to gray code converter. (16)
7. Draw the logic diagram of full subtractor and explain its operation. (16)
8. Draw the circuit diagram of NMOS NAND gate and explain its operation. (16)
9. a) Design a full adder circuit using only NOR gates. (4)
b) Draw the circuit of a CMOS two inputs NAND gate (12)

---

UNIT II SYNCHRONOUS SEQUENTIAL CIRCUITS
PART-A
1. What are the classifications of sequential circuits?
2. Define Flip flop.
3. What are the different types of flip-flop?
4. What is the operation of RS flip-flop?
5. What is the operation of SR flip-flop?
6. What is the operation of D flip-flop?
7. What is the operation of JK flip-flop?
8. What is the operation of T flip-flop?
9. Define race around condition.
10. What is edge-triggered flip-flop?
11. What is a master-slave flip-flop?
12. Define skew and clock skew.
13. What are the different types of shift type?
14. Explain the flip-flop excitation tables for T flip-flop
15. Define sequential circuit?
16. Give the comparison between combinational circuits and sequential circuits.
17. What do you mean by present state?
18. What do you mean by next state?
19. State the types of sequential circuits?
20. What are the types of shift register?

---

PART-B
1) i) Realize a JK flip flop using SR flip flop. (8)
ii) Realize a SR flip flop using NAND gates and explain its operation. (8)
2) Explain various steps in the analysis of synchronous sequential circuits
with suitable example. (16)
3) i) Distinguish between a combinational logic circuit and a sequential (4)
logic circuit.
ii) Derive the characteristic equation of SR flip flop T1 PG 257. (8)
iii) Using a JK flip flop, explain how a D flip flop can be obtained. (4)
4) Design a four state down counter using T flip flop. (16)
5) Design a 4-bit synchronous 8421 decade counter with ripple carry. (16)
6) Design a synchronous 3-bit gray code up counter with the help of
excitation table. (16)
7) Describe the input and output action of JK master/slave flip flops. (16)
8) D(16esign a MOD-10 synchronous counter using JK flip flops
9) Realize SR neither flip flop using NOR gates and explain its operation. (16)
10) a) Design a 3-bit binary up-down counter. (8)

b) Design a 4-bit UP/DOWN synchronous binary counter.
11) a)Design a divide by 6 (MOD 6) counter using T flip flop.
b) Realize a D flip flop using SR and T flip flops.

---

UNIT III

ASYNCHRONOUS SEQUENTIAL CIRCUITS

---

PART A
1) Define asynchronous sequential circuit?
2) Give the comparison between synchronous & asynchronous sequential circuits?
3) What are the steps for the design of asynchronous sequential circuit?
4) What is fundamental mode sequential circuit?
5) What are pulse mode circuits?
6) What is the significance of state assignment?
7) When does race condition occur?
8) What are the different techniques used in state assignment?
9) What are the steps for the design of asynchronous sequential circuit?
10) What is hazard?
11) What is static 1 hazard?
12) What are static 0 hazards?
13) What is dynamic hazard?
14) What is the cause for essential hazards?
15) What is SM chart?
16) What are the advantages of SM chart?
17) What is primitive flow chart?
18) What is combinational circuit?
19) What is state equivalence theorem?
20) What do you mean by distinguishing sequences?
21) Prove that the equivalence partition is unique
22) Define compatibility.
23) Define merger graph.

---

PART B
1. Explain with neat diagram the different hazards and the (16)
way to eliminate them.
2. State with a neat example the method for the minimization
of primitive flow table. (16)
3. a) Explain in detail about Races. (6)
b) Explain the different methods of state assignment . (10)
4. a) Explain the fundamental mode asynchronous sequential circuit. (8)
b) Briefly explain the pulse mode asynchronous sequential circuit. (8)
5.What are the steps in the analysis and design of asynchronous
sequential circuits? Explain with an example. (16)
9. Find a circuit that has no static hazards and implements the
Boolean function F(A,B,C,D) = Σ (0,2,6,7,8,,10,12) . (16)

---

UNIT IV
PROGRAMMABLE LOGIC DEVICES, MEMORY & LOGIC FAMILIES

---

PART A
1. Explain ROM.
2. What are the types of ROM?
3. What is programmable logic array? How it differs from ROM?
4. What is mask - programmable?
5. What is field programmable logic array?
6. List the major differences between PLA and PAL
7. Why the input variables to a PAL are buffered
8. Why RAMs are called as Volatile?
9. Define RAM.
10. List the two categories of RAMs.
11. Define Static RAM and dynamic RAM
12. Define a bus.
13. Define Cache memory.
14. Give the feature of flash memory.
15. What are Flash memories?
16. What is a FIFO memory?
17. What is programmable logic array? How it differs from ROM?
18. Give the comparison between PROM and PLA.
19 Classify the logic family by operation?

---

PART B

1.	a) Explain the operation of bipolar Ram cell with suitable diagram.
	b) Explain the different types of ROM.
2.	What is Ram? Explain the different types of RAM in detail.
3.	Draw the circuit of a NMOS two input NOR gate
	and explain its operation.
4.	Discuss about the TTL parameters. Draw the TTL inverter circuit.
5.	a) Draw the circuit of TTL NAND gate and explain its operation.
	b) Draw the circuit of NMOS NAND gate and explain its operation.
6.	Draw the ECL circuit and explain its operation clearly.
7.	Explain the totem circuit of TTL logic family.

---

UNIT V
VHDL

---

PART A
1) Write the acronym for VHDL?
2) What are the different types of modeling VHDL?
3) What is a package and what is the use of these packages
4) What is variable class give example for variable?
5) Name two subprograms and give the difference between these two.
6) What is subprogram overloading?
7) Write the VHDL coding for a sequential statement (d-flip-flop ) entity
8) What are the different kinds of the test bench?
9) What is Moore FSM?
10) Write the test bench for and gate entity.
11) Give the different arithmetic operators?
12) Give the different bitwise operators.
13. Differentiate a signal and variable?
14. Explain ‘case’ statement in VHDL with an Example.
15. Explain ‘BLOCK’ statement in VHDL with an Example.
16. Explain ‘Process’ statement in VHDL with an Example.
17. Explain ‘Generate’ statement in VHDL with an Example.
18. What is Test Bench?
19. Give the behavioral model for JK flip-flop.
20. Give the behavioral model for T flip-flop.

---

PART B
1. Explain the various modeling methods used in VHDL with an example. (16)
2. Explain in detail about the principal of operation of VHDL Simulator. (16)
3. Write the VHDL program for 4 bit counter. (16)
4. Write the VHDL program for full adder in all three types of modeling? (16)
5. Write VHDL program for 4:1 MUX using behavioral modeling. (16)
6. Write VHDL program for encoder and decoder using structural modeling. (16)
7. With an example explain in detail the test bench creation. (16)
8. Write a verilog program for
1) Full Adder. (8)
2) Shift Register. (8)




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Anna University CONTROL SYSTEM 16marks IMPORTANT QUESTIONS

Anna University

CONTROL SYSTEM

16marks IMPORTANT QUESTIONS

Recommended For EEE Department

Semester 4

---

UNIT 1
1. Explain the TF of armature and field controlled DC motor. (16)
2. Problem from mechanical translational system(analogy of force- voltage and force- current) (16)
3. Problem from signal flow graph + block diagram (8 +8 )

---

Unit 2
1. Explain servomotors and its types (16)
2. Derive the time response of underdamped and critically damped second order system for unit step input (16)
3. Derive the expression for time domain specifications (16)

---

Unit 3 1. Derive the frequency domain specifications of second order system (16)
2. Problem from bode plot determining phase margin,gain margin ,determination of k value,gain and phase cross over frequency( any 2 ) (16)
3. Problem from polar plot (same as bode plot )(16)
4. Explain frequency domain specifications (8)

---

Unit-4
1. Explain the locatiuon of poles on s-plane for stability (16)
2. Problems from routh Hurwitz criterion (8)
3. Problems to determine gain and phase cross over frequency, gain and phase margin from given TF (16)
4. Problems from root locus (16)

---

Unit – 5 1. Derive the realisation of electrical network, frequency response, determination of maximum phase lag and max. Lag angle for
a) lag compensator (16)
b) lead compensator (16) (separate questions)
2. problems from lag compensator or lead compensator (each 16 marks )

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4th semester CONTROL SYSTEM|Anna University Chennai Question Bank, anna university question bank for eee

CONTROL SYSTEM

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PART B IMPORTANT QUESTIONS

UNIT  1

1.       Explain the TF of armature and field controlled DC motor. (16)

2.       Problem from mechanical translational system(analogy of force- voltage and force- current) (16)

3.       Problem from signal flow graph + block diagram (8 +8 )

Unit 2

1.       Explain servomotors and its types (16)

2.       Derive the time response of underdamped and critically damped  second order system for unit step input (16)

3.       Derive the expression for time domain specifications (16)

unit 3

1.       Derive the frequency domain specifications of second order system (16)

2.       Problem from bode plot determining phase margin,gain margin ,determination of k value,gain and phase cross over frequency( any 2 ) (16)

3.       Problem from polar plot (same as bode plot )(16)

4.       Ecplain frequency domain specifications (8)

Unit-4

1.       Explain the locatiuon of poles on s-plane for stability (16)

2.       Problems from routh Hurwitz criterion (8)

3.       Problems to determine gain and phase cross over frequency, gain and phase margin from given TF (16)

4.       Problems from root locus (16)

Unit – 5

1.       Derive the realisation of electrical network, frequency response, determination of maximam phase lag and max. Lag angle for

a)       lag compensator (16)

b)      lead compensator (16) (separate questions)

2.       problems from lag compaensator  or lead compensator (each 16 marks )

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LINEAR INTEGRATED CIRCUITS question banks| (Anna university question banks for 4TH SEMESTER -EEE DePT)

 (Anna university question banks for 4TH SEMESTER -EEE DePT)

 (Anna university question banks for 4TH SEMESTER -EEE DePT)

LINEAR  INTEGRATED CIRCUITS

IMPORTANT  QUESTIONS FOR LINEAR INTEGRATED CIRCUITS 

PART B

 (Anna university question banks for 4TH SEMESTER -EEE DePT)

PART B

IMPORTANT QUESTIONS FROM ALL 5 UNITS:

UNIT-1

1.       Classification of ic’s (8)

2.       Explain epitaxial growth,  Photolithography process (8)

3.       Fabrication of resistor, capacitor, diode, transistor(by giving sample circuits) (16)

4.       Isolation techniques

Unit -2

1.       Explain Block diagram of op-amp (8)

2.       Explain ac characteristics of op-amp (8)

3.        Explain application of op-amp as integrator and diffrentiator  ( read all applications )(8)

Unit 3

1.       Explain three op-amp  instrumentation amplifier with diagram (16)

2.       Explain op-amp as comparator (8)

3.       Explain  D/A convertors (8)

4.       Explain A/D convertors using any two methods /(16)

Unit 5

1 .expalin ic 565 with neat block diagram (16)

2. explain application of ic 555 timer (16)

3. explain functional block diagram of ic 555 timer.(8)

Unit -5

1.       Explain ic voltage regulator with neat sketch (16)

2.       Explain ic 8038 with neat block diagram (16)

3.       3. Explain switching regulators (16)

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