Rajiv Gandhi Proudyogiki Vishwavidyalaya 2010 B.E Electronics and Instrumentation Engineering ei-303 digital circuit and system - Question Paper

EI-303
DIGITAL CIRCUIT AND SYSTEM
(Common for CS/EI/BM Engg,Branch)

Q.1 (a) (i) using 9's complements substract (63458-3354) 4
(ii) Express decimal 5280 in excess-3 code . 4
(b) Minimize the subsequent switching functions using the Karnaugh map. List all prime implicants and essential prime implicants :12
F(x1,x2,x3,x4) = (0,1,2,3,6,7,9,13,14,15 )
Q.2 (a) Minimize the subsequent fuctions using the Quine McCluskey method : 14
F(x1,x2,x3,x4,x5) = (0,2,4,5,6,7,8,10,14,17,18,21,29,31) + d(11,20,22)
(b) Convert the subsequent : 6
(i) (0.513)10 to octal
(ii) 673.124)8 to Binary
(iii) 1010.01101)2 to Decimal
Q.3 (a) Determine the prime-implicants of the function and minimized function : 10
F(w,x,y,z) = (1,4,6,7,8,9,10,11,15)
(b) Design a parity generator to generate an odd parity bit for 4-bit word.Use NAND gates only. 10
Q.4 (a) Design a Full-Adder with 2 Half Adders and an OR gate ? 9
(b) Design a BCD to Excess-3 code converter using the minimum number of NAND gates ? 11
Q.5 (a) discuss the operation of monostable multivibrator with the help of necessary diagram and waveforms.Describe the applications of it. 12
(b) Determine the frequency of oscillation for the free running multivibrator circuit shown beneath.It is provided that RA=RB=1Kohm and C=1000pF.Also compute the Duty Cycle. ? 8
Q.6 (a) How many Flip-Flops are needed to construct a MOD-128 Counter ?A MOD-32 ? What is the largest decimal number that can be stored in a MOD-64 Counter ? 5
(b) What modulus counters can be costructed with the use of 4 flip-flops ? 5
(c) Design a 4-Bit Johnson Counter ? 10
Q.7 (a) define the successive approximation A/D converter with the help of necessary diagram and waveforms ? 10
(b) For a 5-bit resistive divider determine the subsequent : 10
(i) The weight assigned to the LSB.
(ii) The weight assigned to the 2nd and 3rd LSB.
(iii) The change in Outputvoltage due to a change in the LSB the 2nd LSB and 3rd LSB .
(iv) The output voltage for a digital output of 10101 presume 0= 0V and 1= +10 V
Q.8 Write short notes on ant threee of the subsequent : 20
(i) Sample and Hold Circuit
(ii) 2-bit simultaneous A/D converter
(iii) PLA
(iv) ECL
<script type="text/javascript"></script>
<script type="text/javascript"
src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
</script>

Earning:   Approval pending.