I

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10AL51

USN

Fifth Semester B.E. Degree Examination, Dec.2013 lJan.2Ul4

Management and Entrepreneurship
.Time:

Max...
I
06EC52

USN

Fifth Semester B.E. Degree Examination, Dec.2013 lJan.20l4

Digital Signal Processing
Max. Marks:100

Time:...
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06ECs2

c.

Let H(s) =
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+
s'+J2s +l

represent the transfer function of a lowpass

I radlsec. Use frequency
filters:

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06EC53

USN

Fifth Semester B.E. Degree Examination,

Dec.2013 lJan.20l4

Analog Gommunication
Max. Marks:100

Time' 3 hrs...
06EC53

2

of2
06EC54

USN

Fifth Semester B.E. Degree Examination, Dec.2013 lJan.2$l4

Microwaves and Radar
Max. Marks:100

Time: 3 hrs....
10EC55

USN

Fifth Semester B.E. Degree Examination, Dec.2013 /Jan.2O14

lnformation Theory and Goding
Max. Marks:10O

Tim...
10EC55

4 c.

The noise characteristics shown in Fig.Q4(c), find channel capacity.
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Ny

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b.

-

Fig.Qa(c)

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06EC56

USN

Fifth Semester B.E. Degree Examination, Dec.2013 /Jan.20l4
Fundamentals of CMOS VLSI Design
Time: 3 hrs.

Max...
06EC56
10ECs6

USN

Fifth Semester B.E. Degree Examination, Dec. 2013 / Jan 2014.
Fundamentals of GMOS VLSI
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o

o
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Time: 3 hr...
10EC56

b.
c.

(10 Marks)
Design Bus Arbitration logic for n - line bus.
Consider ), - based design rules and 5trrm techno...
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5th Semester Electronic and Communication Engineering (2013-December) Question Papers

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5th Semester Electronic and Communication Engineering (2013-December) Question Papers

  1. 1. I / 10AL51 USN Fifth Semester B.E. Degree Examination, Dec.2013 lJan.2Ul4 Management and Entrepreneurship .Time: Max. Marks:100 3 hrs. Note: Answer FIVE full questions, selecting at least TWO questions from each part. d () ,::,, , .. () PART_A : a. b. Defing management. Write various characteristics of management. ,ri ;,,.,, (05 Marks) Briefl5r explain the various levels and skills required at different management levels. c. o Explain the yarious functions of management. I o (05 Marks) (10 Marks) I E9 c. 6e *l Eoa .=N cdt i: UO 3a. -co 4a. c. oO (t0 ootr >! -6 Ed (05 Marks) (05 Marks) (10 Marks) (05 Marks) (05 Marks) (10 Marks) PART - B What are the qualities of,in entrepreneur? Explain the types of entrepreneur. Explain the various stages in entrepreneurial process. 5a. b. c. -:? o (10 Marks) Explain Maslow's theory of motivfu What are the qualities of a good leader? Briefly explain the essentials of sound controlling. b. 6: (05 Marks) (05 Marks) What is an organaation? EiBlain the purpose flhd nature of an organ:r;ation. What are principles of organization? Briefly explain the steps in the selection procedure. b. c. x() oEl *.a ,.,'''"''' Define planning ahd,discuss its importance. Write dilferences between strategii planning and tacticalplanning. Explain various steps of planning. b. X. bo' 'l' 2a. (05 Marks) (05 Marks) (10 Marks) ojl o.a tra. 6a. b. oj c. o= ,(] 4El !o o.r 7a. :: >! bo' c50 o= o- :'i :o characteristics of small scale industries. Describethe objectives of small scale industries in India. Exptrpin the steps involved in setting up a small scale industry. Enumerate b' , c. ",".'... ',,,,, (), J< . " "_.;L ' . ;lt'',..,r, (05 Marks) (05 Mafks) .,,,,, .) (10Marks) "''" Mention imporlant central and Karnataka state government institutions providiqg support to '. SSIs. (05 Marks) What are the objectives and functions of KIADB? Write short notes on any two: i) Karnataka State Finance Corporation (KSFC). ii) Karnataka State Small Industries Development Corporation (KSSIDC). iii) District Industries Centre (DIC). '(05,&larks) Write various points to be considered for project identification. Write differences between PERT and CPM. Explain in detail the contents of "Project Report". (05 Marks) (05 Marks) ..,.ii ... (10 Marks) -N o o z o q 8a. b. c. ***** (10 Marks)
  2. 2. I 06EC52 USN Fifth Semester B.E. Degree Examination, Dec.2013 lJan.20l4 Digital Signal Processing Max. Marks:100 Time: 3 hrs. Note: Answer FIVEfull questions, selecting at lesst TWO questions from each part. d o o la. o o L b. c. oX !- =- 3 bol -6 .=N o PART _ A 0. d. /.+ What is zero padding? What are its uses? Find the DFT of a sequence x(n) : {1, 1, 0, 0} and the IDFT of y(k) Find the DFT of a sequence q/ Marks) (06 Marks) I. x(n):l for n<n<L : 0 otherwise fbr N:4 plot lx(k)l and EG) (08 Marks) What is a relation between Fourier series coefficients of a periodic sequence and DFT? (03 Marks) xo0 Y(/ oE -O u2 ,=c 2 a. b. c. U(J (05 Marks) State and prove time shifting property of DFT. Find the output y(n) of a filter whose impulse response is h(n): {1, 1, 1} and the input (08 Marks) signal x(n) : {3.-1.0. 1.3.2.0. 1.2. l} using overlap save method. Obtain the 8-point circular convolution of the following sequences: xr(n) : 12.3.6" 8.2. 1.7,5| (07 Marks) x2(n) : {0. 0. 0. 0. 0. l, 0. 0}. (!d a6 'ia oi= 3 a. FindtheDFTofasequencex(n): {1,2,3,4,4,3,2, b. Compute the IDFT of the sequence x(k): {7,A:707 using DIF-FFT :E - j0.707,-j,0.707 algorithm. 1}usingDIT-FFTalgorithm. ' (I0 Marks) -j0.707,1,0.707 +i0.707, j,-A.7A7 + j0.707} (10 Marks) oj o= a<) otE C'- 4 a. b. !O o.i >'t u0" coo o= *o tr> c. =o 3: ci U< i Discuss Chirp-z transform algorithm. Explain the following properlies of twiddle factor WN: i) Symmetric ptoperty ii) Periodicity property. Find x(k) forthe input sequence x(n) : n * 1 and N : 8 using DIF PART - (06 Marks) (04 Marks) - FFT algorithm. (10 Marks) B a.l o Z S a. Design an analog Chebyshev filter for which the squared magnitude response lff , (jgi)l' satisfies the condition 201og,o lH.0O)ln=or, ) -l ; 20 log,o lu"(jei)ln=nr, s -15 o E b. Distinguish between Butterworlh and Chebyshev filters. (08 Marks) (04 Marks)
  3. 3. r 06ECs2 c. Let H(s) = , + s'+J2s +l represent the transfer function of a lowpass I radlsec. Use frequency filters: i) ii) .,r! filter with a passband of transformation to find the transfer functions the following analog A lowpass filter with passband of l0 radlsec. A highpass filter with cut off frequency of 10 radlsec. iiis (os l{$iiib}| s. What is a rectangular window function? Obtain its frequency domain characteristie5;'.';: ,-,'(05 Marks) b:'.,',p-esign FI^R low pass filter using Hamming window (M : 7) and also obt[#[;q;;;y . . 6.',,i, r:' r fe,sp nse Ho c. for * (aj*) = g-rw ; 3nl 4 <w <3nl ' ; 1' =o Explain Gibb's 7 a. What is 4 (l2Marks) 7*tl-1"'l'3nt4.l*l=, phenomenon. "r. Uitin8tlr-" ansformation? Obtain transformatio^n-H(s) , s+a (03 Marks) =;. '--------' (s+a)'+b' into a dieilal filter with ffinite : bilinear (loMarks) t' impulse response by the use of impulse ""'' Obtain the cascade realization,dfuhd system function H(z): (l + 2z-t - z-1 0 +. q., _ r-r). ... L Determine the direct forrn realization of the system function iit b. . the traqsfoimation formula for ,.,,: {i,,..,..1,,,,,,,,,,,,,. I a. i) : Find the impulse response of an FIR lattice filter with coefficientS kr k3 *r . :0.8. Obtain the direct forpl 0.65. kz and direct form-Il structure for the filters given by system function '",-,.*. . l-A-52-t +0.062-2' .' ,:.: (05 Marks) qt'",:::" iri " ,rii :::: ::: _j :::: '. ':: '" {<**** , rir" :: 1,,,,,,"'.l;',' .!, i.::::!i tiN 11!l " 0.34, (09 Marks) 1+0sz,+' '' "::' " ,,,.,,,:::,,1r. : ' ,.--.j,l .
  4. 4. 06EC53 USN Fifth Semester B.E. Degree Examination, Dec.2013 lJan.20l4 Analog Gommunication Max. Marks:100 Time' 3 hrs. Note: Answer FIVE full questions, selecting at least Tl4/O questions from each part. (J o o a. L o. C) b. I ox c. de ool troo a. il 50 Y() 6fi -c 0) b. c. o2 a: a. 54tr b. /6 or= ^X o." ()j o= '-E a. b. cH !o )E > (H * 4i 5 a. (08 Marks) What is bandpass signal? Derive canonical representation of BPS. Draw phasor diagrams and block diagrams to show how BPS can be represented with lowpass signals. (10 Marks) Consider two stage SSB modulator. The input signal consists of voice signals occupying the frequency band 0.3 to 3.4 kHz. The two oscillator frequencies have values f1 : 100 kHz and f2 : 10 MHz. Specif, the following: i) The sidebands of DSB-SC wave appearing at the two product modulator outputs. ii) The sidebands of SSB modulated wave appearing at the two bandpass filter output. (10 Marks) iii) The pass band and guard bands of the two bandpass filters. (10 Marks) Derive time domain expression for vestigial sideband modulated signal. With neat block diagram, explain the operation of a superheterodyne receiver. (10 Marks) PART _ B What is Carson's rule? Show that it applies both to narrow band and wide and FM. (04 Marks) b. An angle modulated signal is described by s(t): 10 cos[2n106t + 0.1 sin10't1. Find the message signal m(t). (.) Z o : Explain with equations ad.'frequency spectrum, the generation of AM with square law (08 Marks) modulator. Take m(t) : A, cos wmt to draw spectrum. (04 Marks) What do you mean by coherent deteetion? What is quadrature null effect? An amplitude modulated voltage is given is V:50(l + 0.2cos 100t + 0.01cos 3500t)cos 106t. State all frequency components pr€sent;in AM signal. Find modulation index for each modulating voltage term. What is'effective modulation index? Find the efficiency of modulation. o() ^^o coO o= uo E> =o o- Dofine and give expressions for i) Joint density function. ); ii) Conditional density functions. t't rks) iii) Marginal density functions. : 2e'2* for x > 0 a PDF? If so find the take a Is the function fir(x) (04 Marks) value between 1 and 3. Define auto comeLat'ion function. State and prove the properties of ACF (Auto Correlation (10 Marks) Function). Express ACF in terms of auto covariance function. c. i) ii) Considering s(t) as phase modulated signal with Ko: 10. (06 Marks) Considering s(t) as frequency modulated signal with kr: 5. : 200 kHz. Maximum phase deviation is In a two stage wideband frequency modulator, f1 taken as 0.2 rad to avoid distortion. Modulating signal range from 50 Hz to 15 kHz. The carrier fiequency at the output is 108 MHz. Select multipliers and mixer oscillator (10 Marks) frequency. Tabulate fc and Af at each stage.
  5. 5. 06EC53 2 of2
  6. 6. 06EC54 USN Fifth Semester B.E. Degree Examination, Dec.2013 lJan.2$l4 Microwaves and Radar Max. Marks:100 Time: 3 hrs. Note: l. Answer FIVEfull questions, selecting ut least TWO questions from each purt. 2. Missing datu may be suitably assumed. 3. Smith chart is permitted. PART _ A o (.) o la. b E c. OJ o ! E9 -^^l =* .= 2 a. b. =h c-.1 Y(.) otr do o> u2 c. 3 a. b. a= (06 Marks) What are the applications of smith chart? Explain briefly. Define reflection co-efficient and derive the equation for reflection co-efficient. (10 Marks) A trans,mission line has R : 2 e.lm. G : 0.5 mmho/m, f: I GHz,L = 8 nH/m, C : 0.23 pF. (0zl Marks) Calculate i) the characteristic impedance ii) the propagation constant. Obtain the expression for wave impedance for TM wave propagation through a rectangular (08 Marks) wave guide. ,' An air filled circular waveguide having an inner radius of ,1 cm is excited in dominant mode at 10 GHz. Find i) the cut off frequency of dominant mode. ii.1 guide wave length iii) wave (04 Marks) impedance. Explain the construction, working and application of isolator based on Faraday rotation. (08 Marks) Explain construction and operation of Gurrn diode in the Gunn mode and LSA mode. (10 Marks) With neat diagram, explain the construciion operation of IMPATT diode and mechanism of (10 Marks) oscillations. Zoi o(J ooi 4a. b. c. ad 'Ea o; 5a. ^X b. o-i oE aa alE c. 6a. !o b. 5.v c. State and explain the properties of S-parameters. Explain S-matrix representation of multiport network. write the relationship of ABCD parameters with z parameterc PAr o= *o tr> t' 'v___, /#, a With a neat diagiam, explain the operation of microwave attenuatOr@,Explain the characteristics of a magic tee, obtain S-matrix representation. Explain the construction of a co-axial cable. , ./'(06 ,1,/ Marks) (t0 Marks) (04 Marks) Explain the construction and field patterns for microstrip line. (08 Marks) Explain the different losses taking place in microstip line. (06 Marks) A shielded strip line has dielectric constant of the insulator e,=2.56, strip wi&h W :25 mils, strip thickness 14 mils, shield depth K factor the 70 mils. Calculate lringe capacitance iii) the characteristic impedance of the (06 Marks) t: =oO €r in[ "[Ei;* Marks) Marks) Marks) d: line. i) i, o- lr< -; 6i la. b. (.) o Z t ii c. Derive the simple radar range equation. (10 Marks) A marine radar operating at 10 GHz has a maximum range of 50 km with an antenna gain of 4000. The transmitter has a power of 250 KW and a minimum detectable signal of 10-rr W Determine the cross-section of the target the radar can sight. (04 Marks) Explain briefly the applications of radars. (06 Marks) o. 8a. With With a neat a neat block diagram, explain working principle of MTI radar. block diagram, explain the operation of a pulse Doppler radar. *r,<*{<* (10 Marks) (10 Marks)
  7. 7. 10EC55 USN Fifth Semester B.E. Degree Examination, Dec.2013 /Jan.2O14 lnformation Theory and Goding Max. Marks:10O Time: 3 hrs. Note: Answer FIVEfull questions, selecting at least TWO questions from eoch part. o g la. b. o o ! c. oX 'l PART _ A c) o ... (06 Marks) Define: i) Unit of information, ii) Entropy, iii) Information rate. The output of an information source consists of 128 symbols 16 of which occur with a probability of ll32 and remaining occurs with a probability of !22! The source emits 1000 symbolslsee assuming that symbols are chosen independently. Find the average information (04 Marks) rate of the solriee. Find Gr and Gz and verify that Gr > G2 > H(s). dv ! -^l ?u= z/rt troo .-r .= . o0 tso otr -o Marks) Show that H(X, Y):H(X/Y)+H(Y). Apply Sha nnon encodlns algorithm. iofu f,o llowing message : nco ding a Si Symbols Sr Sz Probabilities 0.5 0.3 0.2 i) Find the code efficiency and redundancy. il) If the same technique is applied to the second order extension of the source, how much (10 Marks) will the redundancy be improved. A technique used in a source encoder is to arrange message in a order of decreasing probability, divide message into two almost equal groups. Message in 1" group are assigned zero. Messages in 2nd group are assigned with 1. Procedure'is repeated till no further ..... (06 Marks) division iq,po;sible. Find code words for 6 messages. =P o2 a= oO 6O boi -o so -a .) 6 .!J i9 o." oj 6: 3a. b. G; !o >'h lo0 so tr> =o 5L Marks) Fig.Q1(c) i: c. State S-hannon's Hartley law and its implifications. ,:::,,:, (05 Marks) Apply Huffman coding procedure for the following set of messages and determine the efficiency of the binary code so formed symbols Xr, Xz, X: with probadilities 0.7, 0.15, 0.15. If the same technique is applied to the 2nd order extension for the above messages. (10 Marks) How much will the efficiency be improved? For an AWGN channel with 4 kHz-B.W and noise spectral density No/2 : 10-t2 WHz. The signal power required at the receiver is 0.1 mW. Calculate the capacity of the channel. U< (05 Marks) - c'i (04 Marks) State the properties of mutual information. For the JPM given below, compute individually H(X), H(Y), H(X, Y), H(Y/X), H(X/Y) and I(X, Y). Verify the relationship among these entropies. a.) o Z o lo.os ln PtX.Yt:l o o.ro o.2o o.osl oro o l 0 | 0 0.0s0.20 0.r0| 0 0. r0_l 10.0s I (10 Marks)
  8. 8. 10EC55 4 c. The noise characteristics shown in Fig.Q4(c), find channel capacity. K1 Y, Ny , 5a. b. - Fig.Qa(c) : (06 Marks) PART_B What are the different methods of controlling errors? Explain. For a systematic (7, 4) linear code, parity code is given by (06 Marks) t, P_ ,,' I 1,1 0 l01, 011 Find all possible vatii cile vectors. Draw the corresponding on0oding circuit. A single error has occurred in'bach of thesb vectors detect and correct these errors: YA: [0111110], Ye: [101I100], Yc: [1010000] (14 Marks) Draw the syndrome calculation circuit. a. b. What is binary cyclic code? Describe the features of encoder and decoder used for cyclic (10 Marks) codes using an (n - k) bit shift register. Consider(15, 11)cyclic codesgenerated byg(x) : I +x +x4: i) Device a feedback re$ister encoder for this code, ii) Illustrate the encoiling procedure with the message vector 11001101011 by listing the states of the register. (10 Marks) . a. b. c. d. 8 "l:... ' Write explanatory note on: RS codes Golay codes Shorterld cyclic codes Buist Error Correcting Codes ''-'' Consider (20 Marks) (3, 1, 2) convolutional code with impulse respons. gt') ,r:):1lll). i) Draw the encoder block diagram. ii) Find the generator matrix. iii) Find the code vector corresponding transform do main approach. 2 : (110), g{2) = (101), to message sequence 11101 using time domain and (20 Marks) of2
  9. 9. 06EC56 USN Fifth Semester B.E. Degree Examination, Dec.2013 /Jan.20l4 Fundamentals of CMOS VLSI Design Time: 3 hrs. Max. Marks:100 Notez Answer FIVEfull questions, selecting at least TWO questions from each part. o PART _ A o o ! o(! I a. E (n () b. (.) 3q 6= c. Explain the working of enhancement mode transistor with neat nMOSFET structures at different conditions of applied voltages. Also draw the o/p characterjstics and identify the different regions of operation. (08 Marks) How many fiask layers are required in a basic nMOS process? Explain the function of each of these maskS. (07 Marks) What is a mar.eil?. Obtain the values of V1s, Vru, Vol and Von from transfer .noise characteristics of a typical inverter. (05 Marks) GV I =a .rI .= c 2 a. b. Explain },-based design rulcs for contact cuts and,iu, *itt neat diagrams. (12 Marks) Draw the stick diagram for the CMOS implementation of the Boolean expression Y=AB+C. (08Marks) 3 a- -oo Explain the working of dynamic CN{OS logic with necessary diagram and waveforms. What are the problems encountered in this logic? Explain how CMOS domino logic eliminates the above drawbacks with necessary diagrams. (10 Marks) Discuss the working, merits and demerits of the following logic structures with two input NAND gate realization as an example: i,) Complementary CMOS logic; ii) Pseudo NMOS logic. (10 Marks) :: O0 y() -O a= oO b. oog a6 3a 'Ca or= e.a tr0. o." o; 4 a. Two nMOS inverters are cascaded to drive capacitive load Cr,: 168C, as in Fig.Q.4(a). Calculate the pair delay (V;n to Voul) in terms of t for the inverter geometry indicated in figure. WhaJ are the ratios of each inverter? If strays and wirings are allowed for, it would be reasonable' to increase the capacitance to ground across the o/p of each inverter by 4nCr. What is the pair delay allowing for strays? Assume t : 0.1nsec to evaluate thir pai*elfil;ur, o= ad ct LO o.>' (r 50-alJ c o= o.B tr> ^-o VL o- Inverter *I lvo4 Lr- fif* u< ; o Z Lpu : 1 161" Wru:21" Lpa:2X Wpo:21" Inverter 2 Lrr:2X trol /b"Y Wor:2 Lpa:2)" Wpa: 81" Fig.Q.a(a) What is the problem encountered in driving a large capacitive load? How this proilffiTin be overcome using cascaded inverters? Obtain the expression for total delay for N stages of nMOS and CMOS inverters in terms of width factor f and delay r. What is the problem encountered in cascaded inverters? Explain how it is overcome. (12 Marks) I of2
  10. 10. 06EC56
  11. 11. 10ECs6 USN Fifth Semester B.E. Degree Examination, Dec. 2013 / Jan 2014. Fundamentals of GMOS VLSI o o o _3 Time: 3 hrs. Max. Marks:100 Note: Answer any FIVE full questions, selecting atleost TWO questions , o d () ! ?o I a. _ b. i^r troo .=N oYt oi ao =P 3s 6: from J euch part. --' PART. A - well process with neat diagram and write Explain the fabrication steps of CMOS P mask sequence. List the threshold voltage equations and emphasize each the (12 Marks) (08 Marks) term. 2 a. Write the CMOS inverter circuit and briefly explain. Write the CMOS VTC showing regions A, B, C, D, E. Derive the expressions for output voltage in region 'B'. (10 Marks) : AB + CDLF E in CMOS style. b. Write the circuit and layout for Y (10 Marks) 3a. b. c. oc) =h Write the circuit and stick diagram for CMOS tristate inverter. write the circuit otBiCMos NAND and NoR gate and briefly explain. Explain the circuit of dynamic CMOS iogic by taking an eiampre Y= [1[1611ffi. (04 Marks) (08 Marks) of the function (08 Marks) o-o 4 a. 26 : 7 = resistance of 4:1 nmos inverter ,,,:iL Rs - 10k0li, Zpu: 81 , Zpd - 2) with D^ t't-t't- '7 - -o(B ->B oE ^X Define Sheet Resistance (Rs) and standard unit of capacitance (rCg). Calculate the on b. o.' oj total power dissipated if Voo : 5V. Calculate the capaoitance in Cg for the given metal layer shown in size : 5prm and relative value of metal to substrate : 0.075. ' r Fie.eatb) !o 5." >.: fig.e4(b),tii#,T:l (05 Marks) c. * 5oA trxplain briefly the circuit of inverting and non tr> o- t< Also estimate the 3rt dtE 50ecQ o= *o :4. ; a. - ---> inverting super buffer. (07 Marks) PART - B Calculate the O/P voltage Voul in -al (.) o *, Z tt. .t@uen *:# !-gY --fL--_, vq l* Fig.Qs(a) v1,t, 0.6 v f Vs& J below for different values of Vu, Vu. (04 Marks)
  12. 12. 10EC56 b. c. (10 Marks) Design Bus Arbitration logic for n - line bus. Consider ), - based design rules and 5trrm technology. How many nmos 8:1 inverter (rr- =* *O ,r^ =*)can be driven by a minimum size conductor which is 3)" wide and lpm thick? Assume Jtr,.: lrnA/(pm)2 , R": 10K0 / n , Voo a.i',,Discuss the 4 phase clocking scheme to avoid the problem :5V. MarkO ,(06 of cascading in dynamic CMOS b. c. logie. What are the adder enhancement techniques? Briefly 6 - bit carry select adder. Write ,,explair a. Write ana b. (06 Marks) Explain the one trar{sistor dynamic memory cell emphasizfpg three plate capacitor. explain. .:. (04 Marks) (10 Marks) $aip 4 Transistor dynamic and 6 Transistor stiit'li CIIOS memory cell with (12 Marks) sense amplifier. (08 Marks) Write short notes on : a. Latch up. c. I/O " ' . (07 Marks) pads. (07 Marks) 2 of2

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