A NOR gate is followed by a NAND whose inputs are tied together, followed by a NOT gate. Equivalent single gate?
Options

Question

A NOR gate is followed by a NAND whose inputs are tied together, followed by a NOT gate. Equivalent single gate?

G1 Physics · Accepted Answer

Let X = NOT(A + B) after the first NOR. NAND(X,X) = NOT(X). The last inverter produces Y = NOT[NOT(X)] = X = NOT(A + B). Final answer: Option C.