Subtractor Circuit. In digital circuits an adder subtractor is a circuit that is capable of adding or subtracting numbers in particular binary. A full subtractor is a combinational circuit that performs subtraction of two bits one is minuend and other is subtrahend taking into account borrow of the previous adjacent lower minuend bit.
This circuit is used to perform two binary digits subtraction. Below is a circuit that does adding or subtracting depending on a control signal. A combinational logic circuit performs a subtraction between the two binary bits by considering borrow of the lower significant stage is called as the full subtractor.
Subtracting 1 from 0 requires borrow.
Half subtractor is the most essential combinational logic circuit which is used in digital electronics. The half subtractor is a combinational circuit which is used to perform subtraction of two bits. In digital circuits an adder subtractor is a circuit that is capable of adding or subtracting numbers in particular binary. 1 subtracted from 1 results in 0.
