This document provides an overview of digital logic design (DLD). It defines DLD as a system that uses simple number values like 0s and 1s to produce inputs and outputs. The objectives are to understand number systems, Boolean algebra, combinational logic circuits, latches, flip flops and counters. Digital logic is based on binary code and facilitates circuits with logic gates for AND, OR and NOT operations. Computers are digital because they use discrete 0s and 1s rather than continuous values, and all data must be encoded digitally. Examples of digital devices given are digital watches and scoreboards, while analog examples include speedometers, clocks and thermometers.

1. DIGITAL LOGIC DESIGN (DLD)
Lecture # 1
Prepared By
Muhammad Shoaib Saleem

2. COURSE OBJECTIVES
Understand the digital logic design
 Understand the number systems, codes , Boolean
algebra
 Understand the combinational logic, circuits,
latches/flip flops and counters


3. WHAT IS DLD?
 Digital
logic design is a system in electrical
and computer engineering that uses simple
number values to produce input and output
operations.

4. WHAT IS DLD? CONT….
Digital logic design is the basis of electronic
systems, such as computers and cell phones.
 Digital logic is rooted in binary code, which make
information through zeroes and ones, giving each
number in the binary code an opposite value.
 This system facilitates the design of electronic
circuits that convey information, including logic
gates with functions that include AND, OR and NOT
commands.


5. WHAT IS DIGITAL
A single character in a numbering system. In
decimal, digits are 0 through 9.
 In binary, digits are 0 and 1. Describes any system
based on discontinuous data or events.
 Computers are digital machines because at their
most basic level they can distinguish between just
two values, 0 and 1, or off and on.
 There is no simple way to represent all the values
in between, such as 0.25. All data that a computer
processes must be encoded digitally, as a series of
zeroes and ones.


6. EXAMPLES OF DIGITAL DEVICES

Digital watch displays the time that does not vary
continuously but changes from one discrete value
to the other.

7. EXAMPLES OF DIGITAL DEVICES

Digital Scoreboard directly counts discrete values
such as the time left to play and the score of each
team.

8. ANALOG
Analog works with continuous measurement of
physical property.
 Voltage, speed and temperature are some physical
properties that can be measured in this way.
 It has low memory and fewer functions.
 It is difficult to operate and use.
 It is usually build for special purposes.


9. EXAMPLES OF ANALOG DEVICES
 Speedometer
car
is used to measure the speed of

10. EXAMPLES OF ANALOG DEVICES
 Analog
clock measures time by the distance
travelled by hands of clock around a dial.

11. EXAMPLES OF ANALOG DEVICES

Thermometer is an analog device that measures
the length of mercury column.

12. NUMBER SYSTEM
A set of values used to represent different quantities
is know as Number System.

For Example, a number system used to represent
the number of students in a class.

13. NUMBER SYSTEM
Decimal (0-9)
 Binary (0,1)
 Octal (0-7)
 Hexadecimal (0-15) {0-9, A, B, C, D, E, F}
A=10
B=11
C=12
D=13
E=14
F=15


14. BASE OF NUMBER SYSTEMS
Base of Decimal is 10 i.e (97)10
 Base of Binary is 2 i.e (110010)2
 Base of Octal is 8 i.e (97)8
 Base of Hexadecimal is 16 i.e (E6)16


15. ASSIGNMENT#1
Analog VS Digital
Submitted on Next Lecture