This full adder takes 3i/P namely two 1 bit inputs (A,B)and a carry-in(C) input And this vlsi static CMOS design is implemented using 28 transitors which produces a sum bit(S) and carry bit as output (Cout).
The functions of sum and carry expressions are given below which is implemented.
S=Cout'(A+B+C)+ABC.
Cout=(Cout')'=AB+C(A+B).
