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Digital Electronics Most Important Questions, Cheat Sheet of Digital Electronics

University of BurdwanDigital Electronics

Its a set of question for Engineering students. It contain only one subject tought in 3rd semester of all types of engineering degree below masters degree.

Typology: Cheat Sheet

2025/2026

Available from 12/11/2025

aryanshu-kar
aryanshu-kar 🇮🇳

4 documents

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DIGITAL ELECTRONICS SUGGESION
GROUP A
1. a. Write down De Morgan’s theorem with
mathematical and prove it.
b. Express the function Y=A’B+C in Canonical SOP
and POS form.
2. a) Implement the following function using
multiplexers,
F(A, B, C, D) = Σ(0, 3, 10, 11, 12, 13, 15).
b) Design a Full Adder using Half adders. Write
down the truth table of a Full Adder.
c. Design half adder, full adder, half subtractor, full
subtractor using truth table. (4 marks each).
3. a. Conversion between binary, octal, decimal,
hexadecimal (Screenshot: 25 sep 2025 ).
b. Conversion between gray and binary code.
c. Full form of ASCII and EBCDIC.
pf3
pf4
pf5

Partial preview of the text

Download Digital Electronics Most Important Questions and more Cheat Sheet Digital Electronics in PDF only on Docsity!

DIGITAL ELECTRONICS SUGGESION

GROUP A

  1. a. Write down De Morgan’s theorem with

mathematical and prove it.

b. Express the function Y=A’B+C in Canonical SOP

and POS form.

  1. a) Implement the following function using

multiplexers,

F(A, B, C, D) = Σ(0, 3, 10 , 11 , 12 , 13 , 15 ).

b) Design a Full Adder using Half adders. Write

down the truth table of a Full Adder.

c. Design half adder, full adder, half subtractor, full

subtractor using truth table. (4 marks each).

  1. a. Conversion between binary, octal, decimal,

hexadecimal (Screenshot: 25 sep 2025 ).

b. Conversion between gray and binary code.

c. Full form of ASCII and EBCDIC.

  1. a) Simplify the Boolean function using the K-

map method:

(i) F = Σ𝑚( 1 , 2 , 3 , 5 , 6 , 7 , 9 , 13 , 14 )

(ii)F = Σ𝑚( 1 , 2 , 3 , 5 , 6 , 7 , 9 , 13 , 14 ) + Σ𝑑( 8 , 10 , 11 , 15 ).

b)

(i) F = ΠM

(ii)F = ΠM

( 1 , 2 , 3 , 5 , 6 , 7 , 9 , 13 , 14

)

. ΠM( 8 , 10 , 11 , 15 ).

c. Define Pair, Quad, and Octet and prime

implicant.

  1. a. Logic gates and its truth table.

b. What is universal logic gates.

c. What is multiplexer and explain with truth

table, expression, design with gates and

application.

d. Design 8:1 MUX using two 4:1 MUX.

e. Show how MUX can be used to design a Full

Adder circuit

b. What is race round condition. How to

minimise/solve it.

  1. How a JK flip-flop is converted into T flip-flop

and D flip-flop? Write down truth table of T ff and

D flip-flop.

  1. a. What is Counter.

b. design a MOD5/MOD10 counter.

c. Draw the circuit of 4-bit ring counter and

Twisted ring counter. Give the truth table.

d. What are the advantages, disadvantages and

application of ring counter.

e. Application of counter.

  1. a. What is shift resistors and write two

application of it.

b. What are different types of shift resistor.

c. Name the four basic type of shift resistor. Draw

the block diagram and explain the function of

each.

GROUP C

  1. a. Short note on Static and Dynamic RAM.

b. Difference between Static and Dynamic RAM..

c. What is PLA, PAL, GAL, FPLA, FPGA. (2 marks

each).

  1. a. Describe the R-2R Ladder type D/A converter.

b. Describe the Binary weighted resistor type D/A

converter.

c. Describe Successive approximation type A/D

converter.

d. What are the specifications of A/D converter

and D/A converter. (3 marks each).

e. What are the application of A/D converter and

D/A converter. (2 marks each).