Half adder and Full adder

What you will learn here about half adder and full adder

• Half Adder
  • Half adder truth table
  • Half adder circuit
• Full Adder
  • Full adder truth table
  • Full adder using 2 half adder

Half Adder

The combinational circuit that performs the addition of two bits is called Half Adder. The addition of 0 + 0 = 0, 0 + 1 = 1, 1 + 0 = 1, 1 + 1 = 10 (where 1 is carry and 0 is sum).

Half adder truth table

The truth table of Half Adder is shown below.

Half adder circuit

The implementation of the Half adder circuit is shown below.

Full Adder

The combinational circuit that performs the addition of three bits is called Full Adder.

Full adder truth table

The truth table of the Full adder is shown below.

Full adder using 2 half adder

The implementation of full adder using two half adder is shown below