1 Bit Full Adder Equation. Similarly for the carry output of the half adder we need to add y a b in an or configuration. Accordingly the full adder has three inputs and two outputs.
Moreover if p i 1 then if there is a carry in the adder propagates a carry out to the next position no matter what the generate bit g i might be. The carry bit output is given by the relationship. The circuit produces a two bit output.
Half adder and full adder in half adder we can add 2 bit binary numbers but we cant add carry bit in half adder along with the two binary numbers.
So the expressions for the full adder are sum out in x xor in y xor carry in carry out in x and in y or in x xor in y and carry in. So the expressions for the full adder are sum out in x xor in y xor carry in carry out in x and in y or in x xor in y and carry in. The circuit produces a two bit output. But in full adder circuit we can add carry in bit along with the two binary numbers.
