Half Subtractor Full Subtractor Circuit Diagram. Full subtractor also belongs to the class of a combinational circuit and is used to perform subtraction of two binary bits. The disadvantage of a half subtractor is overcome by full subtractor.
Here inputs are represented with a b and outputs are difference and borrow. The logic diagram of half subtractor is shown below. The above circuit can be designed with ex or nand gates.
It has two inputs the minuend and subtrahend and two outputs the difference and borrow out the borrow out signal is set when the subtractor needs to borrow from the next digit in a multi digit subtraction.
In the case of a half subtractor a input is complemented similar things are carried out in full subtractor. Architecture of full subtractor architecture fs arch of full sub is. It requires two inputs as well as gives two outputs. The above circuit can be designed with ex or nand gates.
