What is a NAND gate?

Answer 1

A NAND gate is a digital logic gate that performs the operation of a NOT-AND gate. This means that the output of a NAND gate is the negation of the AND of its inputs. In other words, the output of a NAND gate is true only if one or more of its inputs are false.

A NAND gate is often used as a universal gate, because it can be used to implement any logical function by connecting its outputs to one or more other gates in a specific configuration. This makes it very versatile and useful in the design of digital circuits and systems.

A NAND gate is represented by the symbol shown below, where the inputs are labeled A and B and the output is labeled Y.

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A B

__

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Y |

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The truth table for a NAND gate is shown below, where 1 represents a true or high state and 0 represents a false or low state.

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A  B  Y

0  0  1

0  1  1

1  0  1

1  1  0

As you can see from the truth table, the output of a NAND gate is 1 only when both inputs are 0. Otherwise, the output is 0. This is the negation of the AND function, which is why a NAND gate is also called a NOT-AND gate.