SCHMITT TRIGGER LOGIC GATES

What are Schmitt Trigger logic gates?
Schmitt Trigger gates are devices used to convert imperfect, slow, or noisy signals into well-defined, fast, and noise-free digital signals. They perform the same logical functions as common gates but possess certain special distinctive features.

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Their characteristics make them very useful in many applications where problems with poorly defined, distorted or noisy signals occur.

The gates operate like common gates but are characterized by having a property called hysteresis that makes them immune to noise and allows them to work with non-ideal digital signals. A Schmitt-trigger gate always delivers a square wave to the output, regardless of the waveform of the input signal.

Schmitt trigger

The hysteresis feature means that Schmitt-trigger devices only respond when the voltages applied to their inputs exceed preset limit values, called thresholds.