Schmitt trigger is used in:

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RRB ALP Electronics Mechanic 23 Jan 2019 Official Paper (Shift 2)

Answer 1

Schmitt trigger

F1 Engineering Savita 5-4-23 D4

Schmitt trigger is a comparator circuit that works on positive feedback.
It has only two outputs either +V or -V.
+V is produced when input at the non-inverting terminal is greater than inverting terminal.
-V is produced when input at the non-inverting terminal is smaller than inverting terminal.
The purpose of the Schmitt trigger is to convert any regular or irregularly shaped input waveform into a square wave output voltage or pulse.
Thus, it can also be called a squaring circuit and can be used as a square wave generator.
A Schmitt trigger is a bistable multivibrator, and it can be used to implement another type of multivibrator, the relaxation oscillator.
This is achieved by connecting a single RC integrating circuit between the output and the input of an inverting Schmitt trigger.

F1 Engineering Savita 5-4-23 D6