The Schmitt trigger circuit is a modification of which of the following multivibrators?

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ALP CBT 2 Electronic Mechanic Previous Paper: Held on 21 Jan 2019 Shift 1

Answer 1

A Schmitt trigger is basically an inverting comparator circuit with positive feedback.
The function of the Schmitt trigger is to convert any regular or irregular shaped input waveform into a square wave output voltage or pulse.
The circuit is named a "trigger" because the output retains its value until the input changes sufficiently to trigger a change.
In the non-inverting configuration, when the input is higher than a chosen threshold, then output is high.
When the input is below a different (lower) chosen threshold, then output is low, and when the input is between the two levels, then output retains its value.
This dual-threshold action is called hysteresis and implies that the Schmitt trigger possesses memory and can act as a bistable multivibrator (latch or flip-flop).

F1 S.B Madhu 08.04.20 D4 F1 S.B Madhu 08.04.20 D5