Schmitt trigger for cleaning up noisy or slow-rising digital signals

 

A Schmitt trigger is a circuit that converts an analog input signal into a digital output signal with hysteresis. It's characterised by two different threshold voltages, one for the rising input signal and another for the falling input signal, which provides noise immunity and prevents oscillations.

Logic Inverter with Schmitt Trigger

This circuit can take noisy active low input signal, invert the logic and provide clean Schmitt Trigger output.