In this chapter, we will learn how to solve problems involving logic gates and combinational circuits.

1 Logic Gates

A logic gate is a device that performs basic logical functions that are fundamental to digital circuits. At any instances, every terminal is in one of the two binary conditions, false(0) or true(1).

Ways to represent logic gates:

• Logic diagrams
• Truth Table
• Boolean Algebra

1.1 NOT Gate

1.2 AND Gate

1.3 OR Gate

1.4 NAND Gate

1.5 NOR Gate

1.6 XOR Gate

1.7 XNOR Gate

2 Combinational Circuits

Combinational logic circuits are made up from basic logic gates that are connected together to produce more complicated switching circuits.

A Combinational Logic Circuit is said to be memoryless as the output is dependant at all times on the combination of its inputs.

Ways to represent combinational logic circuits:

• Logic diagrams
• Truth Table
• Boolean Algebra

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Reference:

1. Electronics Point