. 1.

AGJ ?nd half(b) 8 Tt:1 s;.er!]-Y4 [;/ C X II~<:Yr 5/1..J26{ 0

sub- Or$S(REVISED COURSE)

Oak-16/12J J(

Con. 5568-10. GT-7533

N.S.: (1)(2)(3)

(3 Hours) [ Total Marks: 100

Question NO.1 is compulsory. ~ cb ~Attempt any four questions from the remaining six questions.

Assume suitable data if required.

(a) Find the z-transform of x(n) = r n cos (nO)u (n).

(b) Derive the relationship between z-transform and OFT.

1(c) If y (n) = 2x (n) +- v(n _1\' is this system linear?

5

5

5

(d) Calculate the number of multiplications needed in the calculation of OFT using FFT

algorithm with 32-point sequence.

5

2.1 1

(a) Findthetransferfunctionofthe systemgivenby Y(n) -"2 y(n- 1)= x (n) -f 3" x (n 1). 10

1- a 1 z-1(b) Considera causallinearshift invariantsystemwith H(z) :: 1-az

where "anis real. Determine, the range of values of "a" for which the system is stable.

Plot the pole-zero diagram for 0 < a < 1. Show that this system is an all pass system.

10

3. (a) The transfer function of a discrete time system has poles at z = 0,5, z = 0-1 ..!j 0.2 10and eros at z = -1 and z =1

(i) Sketch the pole zero diagram for the system

(ii) Derive the system transfer function H (z)

(iii) Develop the difference equation

(iv) Find if the system in stable.

(b) Use OFT to compute the linear convolution of the signals shown below. 10

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tJ\O;:;3.

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AGJ 2nd half(b) 9

Con. 5568-GT-7533-10. 2

4. (a) Determine causal, non-causal and both - sided signals associated withthe Z-transform. 10

1x(z)::=

1- l'vL -"'-U'vL

(b) Derive composite radix for 6 =2.3 algorithm and draw the flow graph. 10

. 5. (a) Determine the frequency response, magnihide response and phase response for 10

3 1the system given by Y(n) - - y (n -1) + - y (n - 2) = x (n) - x (n -1)4 8

forT =1m sec, f= OHz, 10H z, 100 H zand 1 KH z.

(b) Adigitalsystem is characterized bythe difference equation. y(n)=x(n) + ed.y(n..:1) 10Check the filter for BIBO stability.

"6. (a) Derive the OFT of the sample data sequence exX(n ={ 1,1,2,2,3,3 }and compute 10

the corresponsing amplihide and phase spectrum.

nn(b) Compute the OFTof the sequence x(n)=cos2" where N=4, using DIF FFT 10

algorithm.

7. Write short notes on the following:-(a) Goertzel algorithm(b) Applications of DSP to speech processing(c) Applications of DSP to Biomedical image processing(d) Writethe properties of twiddle factor.

20

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Con. 5716-10.~1Y1;,~ (t2-)

'?u1a h t>s11rI {.,tt>

S?~b ~ OVI DC 1Z.

( REVISED COURSE)( 3 Hours)

GT-7530 A'

[ Total Marks: 100

N.S-. : (1) Question No.1 is compulsory.(2) Attempt any four questions fout of the remaining six questions,(3) Assume any suitable data wherever required justify the same.

1. (a) Arectangularcavityresonatorhas dimensionsofa = 5 cm, b = 2 cm,and d = 15 em. 20Compute:

(i) the resonant frequency of the dominant mode for an air-filled cavity.(ii) the resonant frequency of the dominant mode for a dielectric filled cavity of

Er = 2.56.(b) Compare IMPATTand TRAPTT diodes.(c) What are slow-wave structures? For what purpose are the, slow-wave structures

used in microwave devices?(d) Explain the followingterms for waveguides:

(i) Dominant mode(ii) Degenerate modes(iii) Group velocity(iv) Phase velocity(v) Cutoff frequency.

2. (a)(b)(c)

Derive the field equations for TE modes in circular waveguides.Can TEM mode exist in hollow wave guides? Justify your answer.An air-fielded waveguide with cross-section 2 x 1 cm transports energy in the TE10mode at a rate of 0.5 hp. The impressed frequency is 30 GHz. What is the peakvalue of the electric field occuring in the guide? .

1055

3. (a) Explainthe constructionand workingof a two-holedirectionalcoupler. Definecoupling 10coefficient and directivity of a directional coupler.

(b) Show that the scattering matrix for a series T-junction matched at arm 3 is given 10by-- .

[ s] :;:

.1 12 21 12 2J --1-

J2 J2

112

1-12

0

4. ,(a) Explain velocity modulation in Reflex Klystron. How does it help in bunching the 15electrons? Obtain an expression for the bunching parameter of the Reflex Klystronoscillator.

Con. 6716.GT.7630.10.

7£ /S<2-me:.~ IF/~h-07?J'c5~eY I2 S ub- /YJ DCfZ

oak-3~J',J/oIoIh.~ .IQ 10

(b) A Reflex Klystron operates under the following conditions:,Vo = 500 VRSh = 2a kOfr = 8GHzL = 1 mm is the spacing between repeller and cavity.

The tube is oscillating at fr at the peak of the n = 2 mode or 13/4 mode. Assumethat the transit time through the gap and the beam loading effect can be neglected.

(i) Find the value of the repeller voltage, Vr. .(ii) Calculate the electronic efficiency.

ffi LOlb~6J

5. (a) Draw a neat labelled diagram of a four port circulator. Explain how the flow of 12power is maintained only in one direction in the circulator.Design the same circulator using two magic tees and a phase shifter. .

(b) Compare Klystron amplifier and a TWT based on their operation, efficiency, output 8power, applications, bunching process of electrons and operating frequencies.

'--' 6. (a) Explain the working of a Faraday Rotation Isolator. 6(b) A matched isolator has insertion loss of 0,5 dB and an isolation of 25 dB. Find 4

the scattering coefficients for the isolator.(c) Explain Gunn effect with the two-valley model of Gunn diode. What are the criteria 10

that the semiconductor must satisfy in order to exhibit negative resistance?.

7. Write short notes on :(a) Striplines(b) 1t-mode of operation of a cavity magnetron.(c) Wavemeter method of frequency measurement.

686

-----

rE! EIe?(16~-~ 0<)/,NOV.20/0

Con. 6416-10. (REVISED COURSE)

(3 Hours)

!Ycek.- 4/ ~I ~Io~ub- fYtprt)c-1L

GT-7548\\5 Ocl- 10 Scan of:!

[Total Marks: 100

N.8: 2) Question no one is compulsory.2) Solve any tour from remaining six questions.

r?b~.@

l.a) Design 8086 based microcomputer system using minimum mode with following 12specification

. CPU working at 5Mhz

. 32 KBSRAM (16K X 8 Device). 32 KB EPROM (8 KX 8 Device)Clearly show ~ddress decoding with appropriate address map using exhaustivedecoding. Draw a neat schematic.

b) Explain in brief the memory organization of PIC18Fmicrocontroller and also explain 08the purpose of processor stack.

2;1) Write a program for PIC18F to read 8 bit data on port B I swap the nibbles and 10output the result on port D.

. b) Explainhow an interruptis processed and interruptservice routine is executed in 10PIC18F.

~a) Write a program for performing 32 bit X 32 bit multiplicationusing B086.Assume the 10operands and result are stored in memory.

b) Explain followinginstructions in PIC18Fa) MOVLW b) BCF c) ADDWF d) RLF e) COMF

10

.4;1) Give two examples of each type of addressing mode in 8086a) Direct addressing b) Based addressingc) Based and Indexed Addressing d) Implicit Addressing

08

b) Exp!ain any two operations of Timer in PIC18F and write a program to calculate 12delay of 100 microsecond (frequency 40 MHz).

5.a) Write a program to divide the unsigned 16-bit number OFOFh stored in data register 10REG1 and REG2 (MSB in REG2) by 8.

,b) Drawinterfaceof 8086- 8087 and explain its working with the help of queue status, 10requestIgrantand busyI test interface.

6,1) Explain different modes of operation of OMA Controller. 10

b) Write an assembly language program using 8086 instructions for an up counter, 10which counts from 00 to 7F (hexadecimal). It starts on occurrence of an interruptand counts up by ten digits every time the interrupt arrives. .

7.a) What is segmented memory and what are its advantages? Explain logical and 10physical address in 8086. What are default segm~nt assignments and what issegment override? Explain with suitable examples.

.b) Explain flag register of 8086. Show with suitable examples how direction flag is 10useful in string instructions.

AGJ 2nd half(b) ]7£ IS~M-yrle'61t1 /l.~'" /9If-:20/0s~b- eI

(REVISED COURSE)

Wf!- " ""10

[ Total Marks: 100

Libcy-tt:J--0

Con. 5558-10. GT-7539

(3 Hours)

N.S.: (1)(2)(3)(4)

. (5)

Question NO.1 is compulsory. .

Attempt any four questions out of remaining six questions.

Assume any suitable data wherever required.

Figures to the right indicate full marks.

Illustrate answers with sketches wherever required.

1. (a) What is the order of a system? Give an expression for a first order system with anexample?

(b) What are the basic requirementsof a transducer.(c) What is a need of logarithmic amplifier in instrumentation? Explain logarithmic

amplifier with neat circuit diagram.(d) Explaincascade controllerwith neat diagram.

2. (a) Explain static and dynamic characteristics of instruments. 10

(b) Explain the working of strain gauge in detail. Derive the expression for gauge 10factor for strain gauge.

3. (a) What is LVDT? Explain and draw the complete constructional diagram for it. State 12

the specifications, features and limitations of this transducer. Compare the RVDTwiht LVDT.

(b) Explain capacitive transducer for displacement measurement. Derive its expression. 8

Give its advantages and disadvantages.

4. (a) With the help of neat diagram explain the working of instrumentation amplifier also 12derive its expression. Also explain its advantages.

(b) Design a second order active low pass filter for a cut off frequency of 1 KHz. 8

5. (a) Explain with neat block diagram multichannel data acquisition system to monitor 12temperature, flow, pressure, displacement, level and force.

(b) Explain distributed control system (DCS) with neat diagram. 8

6. (a) Explain feed forward controller with example 10

(b) Explain P, PI, PO and PID controller with neat circuit diagram Also derive the 10expression.

7. (a) Explain standard calibration procedure.

(b) What is five point calibration procedure. Explain in detail.

(c) What is need of controller tuning? Explain different methods of controller tunning.

5

5

5

5

57

8

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GT-7552 -

f'4 Con No ~

Con. 6485-10. (REVISED COURSE)

(3 Hours) [Total Marks: 100

N.B.: (1) Question No.1 is compulsory.(2) Attempt any four out of remaining six.(3) Figures to the right indicate full marks.

1. A)

B)

C)

D)

Explain Restoring Division algorithm with example

Explain basic structure of 4 stage Pipelining.

Explain in Brief interface of Printer to Processor on Parallel port

Define the terms Hit Rate and Miss Penalty, Explain in brief

05

05

05

05

2. A) Explainexecutionof a Completeinstructionin details; How branch instructionsare 10executed?

B) Explain Input and Output operation in AsynchronousBus with the help of timing 10diagrams.

3. A) What are different approaches to Bus Arbitration? Explain these techniques with 10the help of timing diagrams.

B) Explain Memory segmentation in IntellA-32 architecture. 10

4. A) Explain structure of Magnetic Hard disk; Hence explain ReadlWrite operation in 10details.

B) What are Exceptions in Interrupt Handling process? Explain Exception Handling in 10IntellA-32 architecture.

5. A) Explain Address translation process in virtual memory; Hence explain use of 10Translation Lookaside Buffer (TLB).

B) Explain Execution of Branch instruction in ARM Family architecture (RISC). 10

6. A) What are instructionHazards?Explain effect of Branch Instructions in pipelining 10with examples.

B) ExplainRegisterstructurein ARM Familyarchitecture(RISC). 10

7. Writeshort noteson:(AnyTWO)

A) RAIDDisk

B) CacheArchitectures

C) SuperscalarArchitecture.

20

----------------------------

Con. 6260-10.

1lS' t', lJ'f l fL!) 5e rvy-IJJ

( REVISED COUR~E )

( 3 Hours) $46- PI:~11r~1"

N.S.: (1) Question No.1 is compulsory. .

(2) Solve any four questions out of remaining six questions.(3) All questions carry equal marks.(4) Figures to the right indicate full marks.(6) ".'A,ssume suitable data wherever required with justification.

GT-7545

[ Total Marks: 100

fL'L-)1\.11b

1.. Solve thefollowing :-(a) What are the most importanhspecifications of power diode? What factors

. decides the speed of power diode?. (b) What is holding and latching current.of a thyristor? What is relationship between

them. Justify your answer.. ,/(cy\:HOWdo you say a thyristor is completely turned off? Discuss turn off process

of a thyristor.(d) Briefly explain the operation of static circuit breakers.

20

2. (a) A single phas.e h.alfcontrolled converter feeds a highly inductive load. Causing a 10perfectly smoothened dc current. The load resistance is 2.5 Q. The ac sourcefeeding the converter is 220 V, 50 Hz, mains, for firingangle 600 and 1200tabulate :-

(i) The average value of load voltage and load current.. (ii) Device currents.

(iii) Line current and power factor.Assume asymmetrical connection. .

(b) Draw and explain single phase full wave fully controlled rectifier with RL load and 10free wheeling diode with suitable waveforms.

3. (a) Describe the different modes of operation of a thyristor with the help of its Static 10V-I Characteristics.

(b) Explain why.?(i) The inner two layers of an SCR are lightly doped and are wide.

(ii) The inner 'n' layer of an SCR is doped with gold.(iii) Speed of Inverter grade SCR is more than speed of converter grade SCR's.

10

4. Explain the operation of 3-phase fully con~rolled and semi controlled bridge converter 20. with resistive load and associated waveforms.

5. (a) Explain the basic requirements of the successful firing of thyristor in detail. 5(b) Draw and explain the circuit diagram for the synchronized UJT triggering. 15

Also draw and explain the associated voltage waveforms.

6. (a) Draw and explain the operation of cross-sectional structure of power "MOSFET" 10and briefly explain the sources power losses in the switching "MOSFET".

(b) With the help of neat structural diagarm and suitable waveforms, explain the operation 10of "IGBT". Describe briefly the Latchup'sin "IGBT".

7. Write short notes on the following :-(a) Series and parallel connections of SCRs.(b) Over voltage and over current protection of SCR.(c) Soft start method.(d) Ramp and pedestal triggering method of SCR.

20