The two trip points in a Schmitt inverter are 1·5 V and

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The two trip points in a Schmitt inverter are 1·5 V and 2.7 V. If the output is initially HIGH, it will go to LOW state when input voltage—

1. Exceeds 2.7 V
2. Exceeds 1.5 V
3. Is greater than 1.5 V and less than 2.7 V
4. Is less than 1.5 V

Correct Option: A

NA