Schmitt Trigger is a wave-shaping circuit used for the generation of a square wave from a sine wave input. It is a bistable circuit in which two transistor switches are connected regeneratively.
Applications of Schmitt Trigger:
1. Schmitt trigger is used for wave shaping circuits.
2. It can be used for the generation of a rectangular waveform with sharp edges from a sine wave or any waveform.
3. It can be used as a voltage comparator.
4. The hysteresis in the Schmitt trigger is valuable when conditioning noisy signals for using digital circuits. The noise doesn’t cause false triggering and so the output will be free from noise.
5. The hysteresis can be eliminated by keeping RC1 = RC2 in the circuit or by introducing another resistor between the two emitters. Reducing the hysteresis increases the rise and fall times of the output. This makes the triggering more sensitive to small noise fluctuations present in the input signal.