ELEC Q2 LOGIC GATES

• are the basic building blocks of digital electronic circuits. 

• Laws and theorems of _____ are used to manipulate the Boolean expressions and logic gates are used to implement these Boolean expressions in digital electronics. 

• are the three basic logic gates used in digital electronics.

 a branch of Algebra in which the variable’s values are the truth-values, TRUE & FALSE, ordinarily denoted by 1 & 0 respectively

Represented by 1 (on, high, closed)

Represented by 0 (off, low, open)

Tabular representation to show how many possible combinations of values for inputs and their corresponding outputs

• Inverse property

• Represented by an overbar or apostrophe (?)

• Input is 0, output is 1

• Input is 1, output is 0

• Used in NOT gate

• Addition of inputs

• Represented by +

• Input is all 0, output is 0

• Input is all 1 or has 1, output is 1

• Used in OR gate

• Multiplication of inputs

• Represented by ·

• Input is all 0 or has 0, output is 0

• Input is all 1, output is 1

• Used in AND gate

• is a basic logic gate of which the output is equal to the inverse of its input. 

• It is a gate used to represent the complement of variables in binary algebra.