The truth table of a full adder is shown in Table1
i. The A, B and Cin inputs are applied to 3:8 decoder as an input.
ii. The outputs of decoder m1, m2, m4 and m7 are applied to OR gate as shown in figure to obtain the sum output.
iii. Similarly outputs m3, m5, m6 and m7 are applied to another OR gate to obtain the carry output.
iv. Implement of full adder is shown in figure1.