Full Subtractor Diagram. The three inputs are a b and c denote the minuend subtrahend and the previous borrow respectively. Full subtractor definition block diagram truth table circuit diagram logic diagram boolean expression and equation are discussed.
The three inputs are a b and c denote the minuend subtrahend and the previous borrow respectively. In the case of a half subtractor a input is complemented similar things are carried out in full subtractor. This circuit has three inputs and two outputs.
A full subtractor fs is a combinational circuit that performs a subtraction between two bits taking into account borrow of the lower significant stage.
Figure below shows the truthtable of the full subtractor. This circuit can be done with two half subtractor circuits. Fugure below shows the block diagram of the full subtractor. The half subtractors designed can be used in the construction of full subtractors.
