Two gates are cascaded so that output from NAND(A, B) is connected to both inputs of a second NAND. The resultant output is:
Options

Question

Two gates are cascaded so that output from NAND(A,B) is connected to both inputs of a second NAND. The resultant output is:

G1 Physics · Accepted Answer

First NAND output X = NOT(A·B). A second NAND with joined inputs returns NOT(X·X) = NOT(X) = A·B. Final answer: Option C.