Which type of logic gate requires all inputs to be true at the same time for the output to be true?

The AND gate is a fundamental type of digital logic gate that requires all of its inputs to be true (or high) simultaneously in order for its output to be true. This means that if any one of the inputs is false (or low), the output will also be false.

For example, consider a simple scenario with an AND gate that has two inputs. If both inputs are set to true (1), then the output will also be true (1). Conversely, if one or both of the inputs are set to false (0), the output will automatically be false (0). This characteristic makes the AND gate critical in circuits where conditions must be met before a particular action is taken, effectively acting as a requirement for multiple conditions to be fulfilled.

In contrast, other types of logic gates operate under different principles. OR gates produce a true output if at least one input is true, NOR gates output true only when all inputs are false, and XOR gates generate a true output if an odd number of inputs are true. Each of these functions differently and does not require all inputs to be true at the same time, underscoring the unique functionality of the AND gate.