 MORE IN Digital Electronics
Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

1 (a) Calculate (-6)10-(-2)10 using 2's complement method
5 M
1 (b) What is difference between combinational circuit and sequential sircuit?
5 M
1 (c) Explain in brief 'state table' and 'state graphs'
5 M
1 (d) What are salient features of CMOS logic family?
5 M

2 (a) Design a mod 6 ripple counter using T type flip-flop. Draw the circuit designed and output waeforms
12 M
2 (b) What is FPGA? What are salient features?
8 M

3 (a) Design a full adder using 2 half adders. Explain its working
10 M
3 (b) Minimize y=Σm (1,5,7,9,11,13,15) and realise using universal gates
10 M

4 (a) Minimize the following function using Quine McCluskey method:
f(A,B,C,D)=Πm(2,7,8,9,10,12)
12 M
4 (b) Design a full adder using two 4:1 mux
8 M

5 (a) Convert (0.42)10 into binary
4 M
5 (b) Solve 111110.1 ÷ 0101
4 M
5 (c) Convert (11011)2 into gray code
4 M
5 (d) List various characteristics of digital ICs and explain their significance in brief.
8 M

6 (a) Design a 4 bit universal shift register and explain its working
12 M
6 (b) Implement the following boolean expression using 8:1 mux
$f\left(A,B,C,D\right)=\bar{A}\ \bar{B}\bar{C}+ABC+\bar{B}CD+\bar{A}CD$
8 M

7 (a) Design a 3 bit up/down ripple counter.
10 M
7 (b) What is half subtractor? Explain its working
10 M

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