Full Subtractor Circuit Symbol. Where a and b are called minuend and subtrahend bits. It is implemented by using two half subtractor circuits along with or gate this circuit has three inputs a b and b in.
Truth table of full subtractor. The circuit of this can be built with logic gates such as or ex or nand gate. After solving k map simplified boolean expressions for difference is a b b in and for borrow it is a b a b in b.
In the circuit diagram you can see the full subtractor circuit consist of two half adder and an or gate.
The circuit diagram for this can be drawn as the boolean expressions for difference and borrow are difference a b b in borrow a b. In the earlier article already we have given the basic theory of half adder a full adder which uses the binary digits for the computation. Entity full sub is port a b bin in std logic. The circuit diagram for this can be drawn as the boolean expressions for difference and borrow are difference a b b in borrow a b.
