Full Subtractor Half Subtractor. This circuit has three inputs a b and b in. It produces two output bits d and b out.
There are two types of subtractors. The difference output of full subtractor is ex or of b in and output of first half subtractor. Similarly the borrow output of first half subtractor is ored with the borrow output of second half subtractor to get the borrow output of full subtractor.
Full subtractor logic circuit performs subtraction on three bit binary numbers.
Full subtractor logic circuit performs subtraction on three bit binary numbers. It is implemented by using two half subtractor circuits along with or gate. The full subtractor can be implemented with two half subtractors by cascading them. The difference output of first half subtractor is ex or of a and b.
