Full Adder

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A full adder is a simple circuit that adds two bits together along with a carry bit.

Example of a Full Adder.

They have three inputs: A, B, Carry-In (CI), and two outputs: Sum (S) and Carry-Out (CO).

Full Adder Truth Table

A	B	CI	S	CO
0	0	0	0	0
1	0	0	1	0
0	1	0	1	0
1	1	0	0	1
0	0	1	1	0
1	0	1	0	1
0	1	1	0	1
1	1	1	1	1