ANNA UNIVERSITY NOTES: ECE

PART A-(10*2=20MARKS)

1.What is cavitation?
2.What is sonogram?
3.What are different methods of achieving population inversion?
4.Distinguish between homo junction and hetero-junction semiconductor lasers.
5.A signal of 100 mW is injected into fiber. The out coming signal from the other end is 40 mW.
Find the loss in dB?
6.What is meant by splicing in fiber optics?
7.Calculate the equivalent wavelength of electrons moving with velocity of 3*10^7 m/s.
8.What is Compton effect?Write an expression for the Compton wavelength.
9.For a cubic crystal draw the planes with Miller indies(110) and(001).
10.What are Frenkly Schhottky imperfections?

PART-B--(5*16=80)MARKS

11.(a)(i)Explain how ultrasonic can be produced by using magnetostriction method.(12)
(ii)Write any four applications of ultrasonic waves (4)
(or)
(b)In ultrasonic NDT what are the three different scan displays in common use? Explain (10+6)

12.(a)For atomic transitions, derive Einstein relations and hence deduce the expression for the ratio of spontaneous emission rate to the stimulated emission rate.
(or)
(b)What is holography?Describe the construction and reconstruction methods of a hologram.(4+6+6)

13.(a)(i)How are fibers classified?Explain the classification in detail.(8)
(ii)Explain double crucible method of fiber manufacturing.(8)
(or)
(b)(i)Explain the construction and working of displacement and temperature
fiber optic sensors (5+5)
(ii)Explain the construction and working of fiber-optic medical endoscope.(6)

14.(a)(i)Write a note on black body radiation.
(ii)Derive Planck's law radiation.
(or)
(b)(i)What is the principle of electron microscopy? Compare it wroth optical microscope. (4)
(ii)With schematic diagram explain the construction and working of scanning electron
microscope. (12)

15.(a)(i)Explain the terms:atomic radius, coordination number and packing factor.(6)
(ii)Show that the packing factor for Face Centered Cubic and Hexagonal Closed Packed stuctures are equal . (10)
(or)
(b)(i)What are Miller in dices?Explain. (4)
(ii)Derive an expression for the inter planar spacing for(hkl) planes of a cubic
structure.(10)
(iii)Calculate the inter planar for the spacing for(101) plane in a simple cubic crystal whose lattice constant is 0.42nm. (2)

PRINCIPLES OF MANAGEMENT - UN IVERSITY QUESTION PAPER

ANNA UNIVERSITY – COIMBATORE
B.E.\B.TECH.DEGREE-EXAMINATION-DECEMBER 2009
FIFTH SEMESTER-ELECTRONICS & COMMUNICATION ENGG.
PRINCIPLES OF MANAGEMENT

PART A-(2*20=40)
1. What are the streams related to Neo-classical theory.
2. What is a system.
3. Who are all the major contributors to contingency approach of management.
4. What are the functions of management.
5. What are two views on strategy.
6. What are various types of plans based on time.
7. Define policy.
8. What is meant by good alternative.
9. What is meant by formal organization.
10. What are the benefits of staff authority.
11. What is meant by delegation of authority.
12. Define staffing.
13. Define leadership.
14. Define creativity.
15. What is meant by job enrichment.
16. What are the barriers of communication.
17. State few control techniques.
18. What are the types of managerial control.
19. Define productivity.
20. Define budget.

PART B-(5*12=60)

21. A) Explain the challenges that are faced by the management. (4)
B) Describe Henry Fayol’s principles of Management. (8)
22. A) Explain the various steps involved in planning. (8)
B) Explain the elements of most effective MBO systems.
23. A) Explain the common problems and difficulties faced in decision making process. (6)
B) Describe the four approaches of selection process. (6)
24. A) Describe the basis for departmentation. (8)
B) Explain the significance of selection process (4)
25. A) Explain the significance of staffing function. (6)
B) Describe various style of leadership. (6)
26. A) Explain the role of Non-Financial incentives in Motivation (8)
B) What are the advantages of job enrichment.
27. A) What are the characteristics features of controlling. Explain. (4)
B) Explain the process f communication.
28. A) Explain the essential elements of control system (4)
B) Describe the essential requirements for good control system. (8).

DIGITAL SIGNAL PROCESSING - UNIVERSITY QUESTION PAPER

ANNA UNIVERSITY – COIMBATORE
B.E.\B.TECH.DEGREE-EXAMINATION-DECEMBER 2009
FIFTH SEMESTER-ELECTRONICS & COMMUNICATION ENGG.
DIGITAL SIGNAL PROCESSING

PART A-(2*20=40)
1. Define twiddle factor of FFT.
2. The first five DFT coefficients of a sequence x(n) are X(0)=20, X(1)=5+j2, X(2)=0, X(3)=0.2+j0.4, X(4)=0. Determine the remaining DFT coefficients.
3. Calculate the number of multiplications needed in the calculation of DFT and FFT with 64-point sequence.
4. What is zero padding. What are its uses.
5. What are the desirable and undesirable features of FIR filters.
6. What is the necessary and sufficient condition for linear phase characteristics in FIR filter.
7. Define Gibb’s phenomenon.
8. Draw the direct form I structure for the second order system function
H(z)= b0+b1z-1+b2z-2
1+a1z-1+a2z-2
9. Find the digital filter transfer function H(z) by using impulse invariant method.
for the analog transfer function H(s)=1/(S+2).
10. Give any two properties of Butterworth filter.
11. What is warping effect. What is the effect on magnitude and phase responses.
12. Mention any two procedures for digitizing the transfer function of an analog filter.
13. What are the quantization errors due to finite word length registers in digital filters.
14. What is overflow oscillations. What are the methods to prevent it.
15. Define a Deadband of a filter.
16. The filter coefficient H=-0.673 is represented by sign magnitude fixed point arithmetic. If the word length is 6 bits, compute the quantization error due to truncation.
17. What are the addressing modes of TMS320C50.
18. What is the advantage of Harvard architecture of TMS320 series.
19. What is the different buses of TMS320C50.
20. What are the arithmetic instructions of C50.

PART B-(5*12=60)

21. A) Find the 8 point DFT of the given sequence x(n)={0,1,2,3,4,5,6,7} using Dif radix-2 FFT algorithm. (8)
B) Perform the circular convolution of the following two sequences using matrix method. X1(n)={2,1,2,1} , X2(n)={1,2,3,4} (4)

22. A) Design an idea Hilbert transformer having frequency response
H(ej?)=j for -p=?=0.
= - j for 0=?=p. Using rectangular window for N=11. (8)
B) Realize the following system function using minimum number of multipliers (4)
H(z)=1+1z-1+1z-2+1z-3+1z-4+z-5
3 4 4 3
23. Design a digital Butter-worth filter satisfying the constraints. 0.707=¦H(ej?)¦= for 0=?= p/2.
¦H(ej?)¦=0.2 for 3p/4=?= p.
With T=1 sec using bi-linear transformation.
24. A) The input to the system y(n)=0.999y(n-1)+x(n) is applied to an ADC. What is the power produced by the quantization noise at the output of the filter if the input is quantized to (i) 8 bits (ii) 16 bits. (8)
B) Compare fixed point and floating point arithmetic. (4)
25. A) With a neat block diagram explain in detail the architecture of TMS320C50. (8)
B) Write short notes on pipelining. (4)
26. Design a high pass filter with Hamming window with a cut-off frequency of 1.2 radians/sec and N=9.
27. Consider the transfer function H(z)=H1(z) where H1(z)=1/(1-a1z-1) and H2(z)=1/(1-a2z-1). Assume a1=0.5 and a2=0.6 and find the output round off noise power.
28. A) Calculate the DFT of the sequence X(n) = {1,1,-2,-2}. (6)
B) Find the output y(n) of a filter whose impulse response is h(n)= {1,1,1} and input signal x(n)= {3,-1,0,1,3,2,0,1,2,1} using overlap save method.

CONTROL SYSTEMS - UNIVERSITY QUESTION PAPER

ANNA UNIVERSITY – COIMBATORE
B.E.\B.TECH.DEGREE-EXAMINATION-DECEMBER 2009
FIFTH SEMESTER-ELECTRONICS & COMMUNICATION ENGG.
CONTROL SYSTEMS

PART A-(2*20=40)
1. What is the use of mason’s gain formula.
2. Give two examples for open loop and closed loop systems.
3. What do you meant by analogous systems.
4. What are the frequency domain specifications.
5. What are the advantages and disadvantages of feedback control systems.
6. How can we classify second order system based on damping ratio.
7. Define gain margin.
8. Define resonant frequency.
9. State Routh stability criterion.
10. Define Nyquist stability criterion.
11. What are the difference between state space analysis and Transfer function analysis.
12. What are root loci.
13. What is servomechanism.
14. What are the different types of controller.
15. What is synchro.
16. Name the test signals used in control systems.
17. What is polar plot.
18. Give examples for frequency response plot.
19. Write down state mode and output model of state space systems.
20. What do you mean by decomposition of transfer function.

PART B-(5*12=60)

21. A) A unity feedback system has an open loop transfer function G(s)=k/s(s+10). If the damping ratio is 0.5 determine (i) the value of k, (ii) peak overshoot, (iii) time to peak overshoot, (iv) settling time. (8) B) For a unity feedback whose G(s)=1/s(s+1) the input signal is r(t)= 4+6t+2t3. Find the generalized error coefficients. (4)
22. For the given block diagram find corresponding signal flow graph and evaluate closed loop transfer function relating to output and input.
23. Determine the value of k for a unity feedback control system have open loop transfer function G(s)H(s)=k/s(s+2)(s+4) such that (i)gain margin =20db (ii) phase margin =600.
24. Investigate the F(s) for stability using RH criterion (i) F(s) =s4+ks2+(k+1)s+2 (ii) F(s)=s4+s3+3s2+s+6 (iii) F(s)=s5+s4+2s3+2s2+6s+6
25. Obtain the state space model of the system with transfer function C(s)=s2+3s+2
in phase Variable form. R(s) s2+7s+12
26. A system characterized by the following state equation
Find (i) Transfer function of the system (ii) State transition matrix.
27. Sketch the root locus for the system with characteristic equation 1+G(s)H(s)=K(s+2)(s+3)
(s+1)(s-1)
28. Find transfer function of field controlled DC servo motor.

ELECTRONIC CIRCUITS - UNIVERSITY QUESTION PAPER

ANNA UNIVERSITY – CHENNAI
B.E.\B.TECH.DEGREE-EXAMINATION-DECEMBER 2009
THIRD SEMESTER-ELECTRONICS &COMMUNICATIONS ENGG.
ELECTRONIC CIRCUITS-I

PART A-(2*10=20)
1. Define stability factor.
2. Draw the fixed bias single stage transistor circuit.
3. Define CMRR.
4. Draw the small signal equivalent circuit of FET.
5. Two amplifiers having gain 20db and 40db are cascaded. Find the overall gain in db.
6. Define bandwidth.
7. What is theoretical maximum conversion efficiency of class A power amplifier.
8. What is distortion in power amplifiers.
9. Draw the full wave bridge rectifier circuit.
10. What are the advantages of SMPS over conventional regulators.

PART B-(5*16=80)

11. A) (i) For the transistor circuit in fig. find the Q-point. Vcc=15v, B=100, VBE=0.7V

(ii) Calculate the stability factor for a fixed bias circuit.
B) Discuss the various techniques of stabilization of Q-point in a transistor.

12. A) For the CC transistor amplifier circuit, find the expressions for input impedance and voltage gain. Assume suitable model for transistor. (Or)
B) (i) Discuss the working of a basic emitter coupled differential amplifier circuit (8)
(ii) Compare CB, CE and CC amplifiers. (8)

13. A) (i) Discuss the frequency response of multistage amplifiers. Calculate the overall upper and lower cutoff frequencies. (10)
(ii) Discuss the terms rise time and sag. (6) (Or)
B) Discuss the high frequency equivalent circuit of FET and hence derive gain bandwidth product for any one configuration.
14. A) (i) Derive the theoretical max conversion efficiency of class B power amplifier. (10)

(ii) Write short notes on power MOSFET amplifier. (6) (Or)
B) Describe the distortion in power amplifier and the methods to eliminate the same.

15. A) Explain the circuit of voltage regulator and also discuss the short circuit protection mechanism. (Or)
B) (i) Explain the power control method using SCR.
(ii) Design zener regulator for following specification Vin=8v to 12v; Vo=10v, RL=10kO. Assume that zener diode is ideal.

VLSI DESIGN - UNIVERSITY QUESTION PAPER

B.E/B.Tech Degree Examination,November/December 2009.
Seventh Semester
Electronics and Communication Engineering
EC 1401-VLSI DESIGN
(Common to B.E.(Part-Time) Sixth Semester Regulation 2005)
(Regulation 2004)

Part A-(10*2=20 marks)
1.What are the different MOS layers?
2.What are the two types of layout design rules?
3.Define rise time and fall time.
4.What is a pull down device?
5.What are the difference between task and function?
6.What is the difference between === and == ?
7.What is CBIC ?
8.Draw an assert high switch condition if input = 0 and input =1.
9.What do you mean by DFT?
10.Draw the boundary scan input logic diagram.

Part B - (5*16=80 marks)

11.a) Discuss the steps involved in IC fabrication process.(16)
Or
b) Describe n-well process in detail.(16)

12.a)i)Explain the DC characteristics of CMOS inverter with neat sketch.(8)
ii)Explain channel length modulation and body effect.(8)
Or
b)i)Explain the different regions of operation in a MOS transistor.(10)
ii)Write a note on MOS models.(6)

13.a)Explain in detail any five operators used in HDL .(16)
Or
b)i)Write the verilog code for 4 bit ripple carry full adder.(10)
ii)Give the structural description for priority encoder using verilog.(6)

14.a)Explain in detail the sequence of steps to design an ASIC.(16)
Or
b)Describe in detail the chip with programmable logic structures.(16)

15.a)Explain in detail Scan Based Test Techniques.(16)
Or
b)Discuss the three main design strategies for testability.(16)

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