In digital logic, which device is used to invert a signal?

In digital logic, which device is used to invert a signal?

• A. Not gate
• B. And gate
• C. Or gate
• D. Nand gate

Answer: (A)

In digital logic, inverting a signal is done with a NOT gate, also called an inverter. It has a single input and outputs the opposite value of that input: a high becomes a low, and a low becomes a high. This simple one-input, one-output device is specifically designed to flip the logic level. For context, an AND gate produces a high output only when both inputs are high, and an OR gate produces a high output when at least one input is high. A NAND gate is the opposite of an AND gate, giving a low output only when both inputs are high; it’s not the standard way to invert a single signal, though if you tie its inputs together, it can function as a basic inverter in some configurations.

In digital logic, inverting a signal is done with a NOT gate, also called an inverter. It has a single input and outputs the opposite value of that input: a high becomes a low, and a low becomes a high. This simple one-input, one-output device is specifically designed to flip the logic level.

For context, an AND gate produces a high output only when both inputs are high, and an OR gate produces a high output when at least one input is high. A NAND gate is the opposite of an AND gate, giving a low output only when both inputs are high; it’s not the standard way to invert a single signal, though if you tie its inputs together, it can function as a basic inverter in some configurations.