FULL SUBTRACTOR

In full sub tractor , there are 3 bit input. DIFFERENCE = (A XOR B) XOR B-IN BORROW-OUT = ((NOT) A AND B) + ((NOT)(A XOR B) AND B-IN) TRUTH TABLE A B B - IN DIFFERENCE B - OUT 0 0 0 0 0 0 0 1 1 1 0 1 0 1 1 0 1 1 0 1 1 0 0 1 0 1 0 1 0 0 1 1 0 0 0 1 1 1 1 1