Digital Logic Design
Lec No 03 : Course Objectives, Number Systems
Fall 2021
Dated 17 September 2021
By Nasir Mahmood
nasir.mahmood@seecs.edu.pk
nasirm15@gmail.com
1
Last Lecture Review
About the Course Title
Digital Logic Design
Motivation for learning the Course
Mostly all the devices and systems are digital
Lays foundation for Computer Hardware and other computer engineering subjects
Course Objective and Description
Student will be able to design and implement practical logic circuits and do
innovative projects
Text and Reference Books
Must read text book and practice more from reference books
My introduction
Aeronautical Engineer serving NUST for the last Twenty years, Taught DLD many
times
2
Lecture Learning Outcomes
What is DLD Course Objective and how Course
Learning outcomes are related to OBE PLOs?
What are the tips to good deeper understanding of
subject and attain a good grade?
What is the basis of any number system?
How to convert any number system to decimal
number system?
Course Objective
After the course the students will be able to
design practical logic circuits using digital
integrated circuits
The students will be able to Design Digital
Circuits to solve practical problems by doing
projects
Course Description
The Objective of this course is to strengthen the understanding of
computer building blocks
This course is concerned with the design of digital electronic
circuits
It covers the basic tools for design of digital circuits and provides
methods and procedures suitable for variety of digital design
applications
It starts with the basic concepts of Boolean algebra and number
systems and then will focus on the design and implementation of
combinational and sequential circuits.
Course Learning Outcomes
(CLOs)
Program Learning Outcomes
(PLOs)
Assessment Waitages
Tips to Get good Grades
• Focus on learning rather than getting marks
• Clarify your queries in the class by asking
maximum questions and participate on
forum to clear your doubts
• Follow a study schedule to revise your
lectures
• Make other people understand, try to teach
to other students
• Do your assignments and project yourself
• Read more on courses on web
• Practice coding on regular basis
Introduction to Digital System
Computer manipulate discrete information
Any set that is restricted to a finite number of elements contains discrete
information
Example 10 digits, 26 letters, 52 playing cards, 64 squares of chess board
Discrete information is represented by physical quantities
called signals
Electric voltage and current are common
Transistor are used to implement the signals
Two discrete values called Binary
Numbers
5382
What is this number?
Five thousand three hundred and eighty two
5382 = 5000 + 300 + 80 + 2
= 5 x 103 + 3 x 102 + 8 x 101 + 2 x 100
Digits
Base
Numbers Contd..
1011001.101
• What does this number represent?
•
Consider the base (or radix) of the number.
Base =
2
Digits = 0, 1
Binary Number System
(1011001.101)2 = 1x26 + 0x25 + 1x24 + 1x23 + 0x22 +
0x21 + 1x20 + 1x2-1 + 0x2-2 + 1x2-3 = (89.625)10
Numbers Contd..
R is the radix or base of the number system
− Must be a positive number
− R digits in the number system: [0 .. R-1]
Important number systems for digital systems:
− Base 2 (binary): [0, 1]
− Base 8 (octal): [0, 1, 2, 3, 4, 5, 6, 7]
− Base 16 (hexadecimal):
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F]
The End