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Digital Electronics

This document is an assignment for the Digital Electronics course at Mangalayatan University, detailing questions across three sections. Section A consists of multiple-choice questions, Section B includes problems requiring calculations and explanations, and Section C focuses on simplification and design tasks. The assignment covers fundamental concepts in digital electronics, including binary arithmetic, logic gates, and flip-flops.

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19 views2 pages

Digital Electronics

This document is an assignment for the Digital Electronics course at Mangalayatan University, detailing questions across three sections. Section A consists of multiple-choice questions, Section B includes problems requiring calculations and explanations, and Section C focuses on simplification and design tasks. The assignment covers fundamental concepts in digital electronics, including binary arithmetic, logic gates, and flip-flops.

Uploaded by

rawst.adi
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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Mangalayatan University, Aligarh

Faculty of Engineering & Technology


Assignment
Class/Course- Diploma/B.tech…
Subject Code-WEC-302

Subject Name- Digital


Electronics
Note: - All the answers have to be written in the assignment copies provided and to be
submitted in the University.

Section-A (10*1 =10 marks)


Que.1 What is the decimal equivalent of binary 1101?
A) 11
B) 13
C) 15
D) 14
Que 2. Which code is an example of a weighted code?
A) Gray code
B) Excess-3
C) 8421
D) ASCII
Que.3 Which logic gate is known as a universal gate?
A) AND
B) OR
C) NAND
D) XOR
Que.4 De Morgan’s first theorem states:
A) (A + B)’ = A’B’
B) (A.B)’ = A’ + B’
C) A + AB = A
D) A + A’ = 1
Que.5 Which logic family is known for low power consumption?
A) TTL
B) CMOS
C) ECL
D) RTL

Que.6 The fan-out of a logic gate refers to:


A) Number of inputs it can drive
B) Number of outputs it can drive
C) Power dissipation
D) Noise margin

Que.7 Which flip-flop is called a data flip-flop?


A) JK
B) RS
C) D
D) T
Que.8 A full adder has how many inputs and outputs?
A) 2 inputs, 1 output
B) 3 inputs, 2 outputs
C) 3 inputs, 1 output
D) 2 inputs, 2 outputs

Que.9 Which flip-flop toggles its output on every clock pulse?


A) RS
B) JK
C) T
D) D

Que.10 Which of the following registers shifts bits in both directions?


A) SISO
B) SIPO
C) PISO
D) Universal Shift Register

Section-B (5*4=20 Marks)

Que.11(a) Perform binary addition of the following two binary numbers:


1011.01+1101.11
Que. 11 (b) Convert the decimal number 156 to binary and hexadecimal form.
Que.12 Simplify the following using Boolean algebra method:
F(A,B,C) = A′BC+AB′C+ABC′+A′B′C′
Que. 13 Compare TTL and CMOS logic families based on speed, power dissipation, and fan-out.
Que.14 Draw the logic diagram of a 4:1 multiplexer and explain its operation.
Que.15 Explain the working of a serial-in parallel-out (SIPO) shift register with a neat diagram.
Section-C (10*2 =20 Marks)
Que.16(a) Simplify the Boolean expression using a Karnaugh map:
F(A, B, C, D) = Σ(0,1,2,5,6,7,8,9,10,14)
Que16(b) Explain the working of a JK flip-flop with a neat diagram.
Que.17 Design a 3-to-8 line decoder using basic logic gates. Draw its circuit diagram, truth
table, and explain its working.

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