Logic Gates: NOT Gate
Term 2 Week 3 Subject: ICT
ABZ Private School

Lesson Objective
Discover the logic gate NOT, including the symbol and truth tables.
Describe how logic gate NOT is used in carrying out computation.

The AND Operation

The NOT Operation
Formula:
Y= Ā
NOT Gate
In a NOT gate, the output of a NOT gate if and only if
the input does not attain state 1.
Logic NOT gates provide the complement of their input signal
and are so called because when their input signal is “HIGH” their
output state will NOT be “HIGH”.

The NOT Operation
Formula:
Y= Ā
Problem 1: The regular voltage in our home outlet is 240v
NOT 12v.
240v 12v

NOT Gate Operator
Formula:
Y= Ā
Problem 1: I want to search on the internet regarding CATS,
but when I search for a Animals, it didn’t shown pictures of
cat. Why?

Combining OR and NOT Gate
Formula:
Y= Ā
Problem 1:

Combining AND OR and NOT
Gate.
Problem :
A B C D Q
1 0
False True