6

Reg No.:_ Name:

Max. Marks: 100

10

11

12

FOURTH SEMESTER B.TECH DEGREE EXAMINATION(S), DECEMBER 2019

a)
b)

a)

D192038 Pages:2

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY

Course Code: EE204
Course Name: DIGITAL ELECTRONICS AND LOGIC DESIGN

PARTA
Answer all questions, each carries 5 marks
Convert 9830 to decimal .
Subtract 5Ci¢ from 9416.
Convert Y=AB + B’CD into a product of max terms by algebraic method.
Design a full subtractor and show that it can be realized using two half
subtractors.
Realize an S-R flip flop using D flip flop.
What is the importance preset and clear pin in flip flops? How they are utilised
when designing a counter .
Explain Moore state machine model
Draw the schematic of a successive approximation A/D converter and explain
working
Differentiate ROM, PLA and PAL circuits
PART ‏تا‎
‎Answer any two questions, each carries 10 marks
Explain the gray code 10110010101 to binary numbers
Convert 1010.0112 into decimal number
Add the hexadecimal numbers 10716 + ACi6
Differentiate the methods of binary subtraction using 115 complement and 2’s
complement methods with suitable example.
Obtain the canonical product of sum form of the following function;
F(A,B,C) = (A+B’)(B+C)(A+C’)
Apply De-Morgan’s theorems to the following expression (ABC)’ + (D’+E)’
Using karnaugh map, simplify the expression
F(A,B,C,D) = >. (0,2,3,5,7,8,13) + d(1,6,12)
PART C
Answer any two questions, each carries 10 marks

Design a full adder circuit with decoder 1 C

Page 1 of 2

Duration: 3 Hours

Marks

5

ما

ما