Difference Between Half Adder and Full Adder
Given Below is the Difference between the Half adder and Full adder
| Parameters | Half Adder | Full Adder |
|---|---|---|
| Description | Half Adder is a combinational logic circuit that adds two 1-bit digits. The half adder produces a sum of the two inputs. | A full adder is a combinational logic circuit that performs an addition operation on three one-bit binary numbers. The full adder produces a sum of the three inputs and carry value. |
| Previous carry | The previous carry is not used. | The previous carry is used. |
| Inputs | In Half adder, there are two input bits ( A, B). | In full adder, there are three input bits (A, B, C-in). |
| Outputs | The generated output is of two bits-Sum and Carry from the input of 2 bits. | The generated output is of two bits-Sum and Carry from the input of 3 bits. |
| Used as | A half adder circuit cannot be used in the same way as a full adder circuit. | A full adder circuit can be used in place of a half adder circuit. |
| Feature | It is simple and easy to implement | The design of a full adder is not as simple as a half adder. |
| Logical Expression | Logical Expression for half adder is : S=a⊕b ; C=a*b. | Logical Expression for Full adder is : S=a⊕b⊕Cin; Cout=(a*b)+(Cin*(a⊕b)). |
| Logic gates | It consists of one EX-OR gate and one AND gate. | It consists of two EX-OR, two AND gates, and one OR gate. |
| Applications | It is used in Calculators, computers, digital measuring devices, etc. | It is used in Multiple bit addition, digital processors, etc. |
| Alternate name | There is no alternate name for half adder. | Full adder is also known as ripple-carry adder. |
Difference between Half Adder and Full Adder
In this article, we will go through the Difference between the Half adder and Full adder, First, we will briefly describe what is half and full adders with their logical expressions and truth table, and then we will go through their differences between them, At last we will conclude our article with some FAQs.
Table of Content
- What is Half Adder?
- What is Full Adder ?
- Half Adder Vs Full Adder
- Conclusion
- FAQs
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