Half Subtractor Full Subtractor Circuit Diagram. A logic circuit which is used for subtracting three single bit binary digit is known as full subtractor the truth table of full subtractor is shown below. In the circuit diagram you can see the full subtractor circuit consist of two half adder and an or gate.
Here inputs are represented with a b and outputs are difference and borrow. Entity full sub is port a b bin in std logic. D is the difference bit and b out is the borrow out bit.
Full subtractor logic circuit performs subtraction on three bit binary numbers.
Fugure below shows the block diagram of the full subtractor. What is half subtractor. Hence logic circuit diagram for half adder can be drawn as full subtractor. The half subtractor as said above is a combinational circuit and as it name goes it is used to subtract the two bits from the input.
