Logic gates are electronic combinational circuits which contain one or more electrical inputs and usually one output.

A combinational circuit’s output depends on the state of it’s inputs.

We use truth tables to document the  behaviour of a logic gates.

In class demonstration

Demonstrate an AND gate and describe with a truth table and in words

(Teacher constructs the truth table from description for a 2 input and a 3 input gate)

“An AND gate’s  output is true only when both inputs are true”

Homework/In class exercise

Draw the truth table for  the following gates

1. AND
2. OR
3. NOT
4. ExOR
5. NAND

Describe their outputs or mode of operation using a well formed sentence in English. E.g “An AND gate’s  output is true only when both inputs are true”

© 2021  Vedesh Kungebeharry. All rights reserved.