Full Adder Using 2 Half Adder. The logic circuit for full adder can be drawn as full adder using half adder. The second half adder adds the output of the first adder and the c in to get the final output s.
Connect s1 and cin to the second half adder. The circuit diagram for this can be drawn as and it could be represented in block diagram as the boolean expression for sum and carry is as sum a b c carry ab a b. They are the basic building blocks for all kinds of adders.
Implementation of full adder using nand gates.
Implementation of full adder using nand gates. The function of the first half adder is to add the inputs a and b to produce a partial sum. The second half adder adds the output of the first adder and the c in to get the final output s. Implementation of full adder using nand gates.
