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Digital ElectronicsDigital Interfaces

Which property distinguishes a Schmitt-trigger digital input from an ordinary single-threshold input?

  • AIt has two switching thresholds and hysteresis
  • BIt stores one bit indefinitely
  • CIt always inverts the signal twice
  • DIt requires no supply voltage
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Correct Answer: A. It has two switching thresholds and hysteresis
Explanation: A Schmitt-trigger input uses different rising and falling switching thresholds, creating hysteresis that improves immunity to slowly varying or noisy inputs.
Reference: Standard digital electronics: Schmitt trigger
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