Difference between Full Adder and Half Adder
Full Adder:
Full Adder is a combinational circuit that forms the arithmetic sum of three input bits. It consists of three inputs and two outputs. Two of the input variables are denoted by x and y. It represents the two significant bits to be added. The third input, z represents the carry from the previous lower significant position.
Half Adder:
It is the most basic digital arithmetic circuit is the addition of two binary digits. A combinational circuit that performs the arithmetic addition of two bits is called a half-adder.
Full Adder vs Half Adder:
| 1. Full adder circuit is complicated | 1. Half adder circuit is simple |
| 2. It is a combinational circuit which adds three 1-bit digits | 2. It is a combinational logic circuit which adds two 1-bit digits |
| 3. Half Adder is combinational logic circuit which adds two 1-bit digits | 3. It is used for 2-bit addition |
| 4. Carry generated from previous addition is added in the next step | 4. Carry generated from previous addition is not added in next step |
| 5. It consists of two EX-OR, two AND gate and one OR gate | 5. It consists of one EX-OR gate and one AND gate |
| 6. Applications: Multiple bit addition, digital processors etc. | 6. Applications: Calculators, computers, digital measuring devices etc. |