Sommatore 2 bit + 2 bit (A + B)

Ingressi (bit):
Output (C2 S1 S0): C2 = 0, S1 = 0, S0 = 0   |  A = 0, B = 0, A + B = 0
Bits (MSB → LSB = C2 S1 S0): 0 0 0
A1 A0 B1 B0 ⊕ ∧ S0 C0 ⊕ ∧ T1 C1 ⊕ S1 ∧ T2 ∨ C2