A NOR gate feeds a second NOR with its two inputs connected together. What is its output truth table?
Options

Question

A NOR gate feeds a second NOR with its two inputs connected together. What is its output truth table?

G1 Physics · Accepted Answer

First NOR stage X = NOT(A + B). The next NOR has both inputs tied to X, so Y = NOT(X + X) = NOT(X) = A + B. Thus output values for 00,01,10,11 are 0,1,1,1. Final answer: Option C.