Half subtractor: Is a combinational logic circuit

Half subtractor is a combinational logic circuit intended to perform the subtraction of two single bits and generate the output. A subtractor circuit with two input variables as A and B displays two outputs i.e Difference and Borrow. The block diagram of a Half subtractor is as shown below: A half subtractor is a digital logic circuit that performs the binary subtraction of two single-bit binary numbers. It has two inputs, A and B, and two outputs, Difference and Borrow. A Full Subtractor is a combinational circuit used to perform binary subtraction. It has three inputs: A (Minuend) B (Subtrahend) B-IN (Borrow-in from the previous stage) It produces two outputs: Difference (D): The result of the subtraction. Borrow-out (B-OUT): Indicates if a borrow is needed for the next stage. The full subtractor is essential because a half-subtractor can only subtract the least significant bit (LSB) of binary numbers. However, if a borrow is generated during the ... Half subtractor Figure 1: Logic diagram for a half subtractor The half subtractors can be designed through the combinational Boolean logic circuits [2] as shown in Figure 1 and 2. The half subtractor is a combinational circuit which is used to perform subtraction of two bits.