NOR Gate

he NOR gate is high output (1) results if both the inputs to the gate are low (0); if one or both input is high (1), a low output (0) results. NOR is the result of the negation of the OR operator. It can also be seen as an AND gate with all the inputs inverted. NOR is a functionally complete operation—NOR gates can be combined to generate any other logical function. By contrast, the OR operator is monotonic as it can only change LOW to HIGH but not vice versa.

NOR Symbol

Example for NOR

NOR gate truth table