![]() The first NAND gate takes the inputs which are the two 1-bit numbers. The minimum number of NAND gates required to design half adder is 5. It is always simple and efficient to use the minimum number of gates in the designing process of our circuit. A universal gate can be used for designing of any digital circuitry. NAND gate is considered as a universal gate. The half adder can also be designed with the help of NAND gates. The truth table consists of all possible combination of input that can be given to the digital circuit and all the resulting outputs. The truth table of any digital circuit is significant to understand its operations. The AND gate will generate the carry bit as output and the EX-OR gate will generate the sum bit of the addition performed. The input numbers to be added is given to AND gate as well as EX-OR gate. This is the simplest of all the other possible designs of half adder. In the above circuit diagram, it is apparent that one AND gate is used along with EX-OR gate. We will discuss all the possible designing one by one in this article. Half adder can also be designed with the help of universal gates. The circuit of half adder can be designed with the help of basic building blocks of digital electronics realm i.e. ![]() We will also discuss other crucial application later in this article. Therefore, it is called half adder.Īlthough, the major significance of adder is that it can perform addition but apart from this it is also used in processors of computer systems for address decoding. The word “HALF” before the adder signifies that the addition performed by the adder will generate the sum bit and carry bit, but this carry from one operation will not be passed for addition to successive bits.
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