SN7483 Four-Bit Adder -- Logic Equations

Pi = (BiAi)?(Ai + Bi)

= (Ai? + Bi?)(Ai + Bi)

= Ai ? Bi (4.24)

?i = Pi ? Ci-1

= Ai ? Bi ? Ci-1 (4.25)

C1 = [C0?(A1B1)? + (A1 + B1)?]?

= [C0?(A1B1)?]?(A1 + B1)

= (C0+(A1B1))(A1 + B1)

= C0A1 + C0B1 + A1B1 (4.26)

Similarly

Ci = Ci-1Ai + Ci-1Bi + AiBi

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