B.TechSemester 42022-23Digital ElectronicsKOE-049

Digital Electronics (KOE-049) - AKTU Question Paper 2022-23

B.Tech · Semester 4 · Free PDF Download

This is the official AKTU Digital Electronics Previous Year Question Paper for B.Tech Semester 4, academic session 2022-23. Published by Dr. A.P.J. Abdul Kalam Technical University (AKTU/UPTU), Lucknow. Free PDF download — no login required.

Course:B.Tech

Semester:Semester 4

Session:2022-23

University:AKTU / UPTU

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Questions Asked in 2022-23

Digital Electronics (KOE-049) — complete question paper

Section AAttempt all questions in brief. 2 x 10 = 20

a
Interpret the binary number 2(1011) into (i) Gray code (ii) Excess-3 Code
b
Evaluate 2(1011) - 2(1101) using 1’s and 2’s complement method
c
Differentiate between the serial and parallel adder
d
How many 4 X 1 multiplexers are required to implement 64 X 1 multiplexer
e
What is the difference between characteristic and excitation table
f
Differentiate between combinational and sequential circuits
g
How many address lines are needed to represent 8K meaning
h
Define term propagation delay. (i) Define race around condition in JK flip flop. (j) Give the difference between PAL and PLA

Section BAttempt any three of the following: 10x3=30

a
Implement the Boolean function F(x,y,z)=(1,2,3,4,6,7) using NAND gates
b
Construct a full adder and implement the full adder with the help of half adders. Also implement the full adder with NAND gates only
c
Discuss excitation table for SR, JK, T and D flip flop
d
Design 8Kx8 RAM memory system, using 1Kx8 memory ICs
e
Discuss Mealy and Moore finite state machine with an example

Section CAttempt any one part of the following: 10x1=10

b
Minimize the following Boolean function using tabulation method
b
Draw and Explain 2-bit magnitude comparator. Also r epresent output with the help of logic diagram
a
Design and implement MOD-10 synchronous counter
b
For the clocked JK Flip-Flop write the state table, state equation with state diagram
a
Why ECL is better? Implement NAND gate with DTL and TTL
b
Define noise margin, Fan-in, Fan-out as characteris tics of logic families. Implement NAND gate with CMOS
a
Explain State Reduction and assignment with suitable example
b
Design a sequential circuit with two flip flops, A & B and one input X. When X=0 state of the circuit remains the same, when X = 1 circuit passes through the state transition from 00 to 01 to 11 to 10 back to 00 and repeat

Question text is extracted from the official AKTU question paper PDF above. Hindi translations are omitted — every question is printed in English in the original paper. Last verified: 2026-08-23.

Repeated Questions — KOE-049

Questions that appeared in more than one session, found by comparing 2 years of Digital Electronics papers (2021-22, 2022-23)

Minimize the following Boolean function using tabulation method

Appeared in: 2021-22 · 2022-23

Design a sequential circuit with two flip flops, A & B and one input X. When X=0 state of the circuit remains the same, when X = 1 circuit passes through the state transition from 00 to 01 to 11 to 10 back to 00 and repeat

Appeared in: 2021-22 · 2022-23

Digital Electronics — Other Year Papers

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