A digital circuit is designed to have an output that is the inverse of the input only when the input is high. Which single logic gate is best suited for this purpose?
Understand the Problem
The question describes a digital circuit with specific behavior: the output should be the inverse of the input only when the input is high. This implies that when the input is low, the output should remain low. We need to identify the logic gate that achieves this behavior.
Answer
A NAND gate is the most suitable because it inverts the input only when the input is high.
The best single logic gate for this purpose is a NAND gate. When the input is high, the NAND gate acts as an inverter. When the input is low, the output is high, effectively disabling the inversion.
Answer for screen readers
The best single logic gate for this purpose is a NAND gate. When the input is high, the NAND gate acts as an inverter. When the input is low, the output is high, effectively disabling the inversion.
More Information
A NAND gate is a combination of an AND gate followed by a NOT gate. Its output is the inverse of an AND gate. If all inputs are high, the output is low; otherwise, the output is high.
Tips
A common mistake is selecting a NOT gate, but a NOT gate always inverts the input, regardless of its state. The question requires inversion only when the input is high.
Sources
- Logic Gate (AND, OR, XOR, NOT, NAND, NOR and XNOR) - geeksforgeeks.org
- Understanding Basic Logic Gates: AND, OR, XOR, NOT, NAND ... - quarktwin.com
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