In
digital electronics, a
NAND gate (
negative-AND) is a
logic gate which produces an output which is false only if all its inputs are true; thus its output is
complement to that of the
AND gate. A LOW (0) output results only if both the inputs to the gate are HIGH (1); if one or both inputs are LOW (0), a HIGH (1) output results. It is made using transistors and junction diodes. By
De Morgan's theorem, =+, a NAND gate is equivalent to
inverters followed by an
OR gate.