SCHMITT TRIGER

When an input signal to a digital circuit un- matches the characteristics of a digital signal it can have some sort of noise. This circumstance require a specialized circuit that will modify a signal and make it to actual or true digital shape. The required circuit can be said as Schmitt Trigger. But the trigger for this circuit to change forms is the input voltage state, instead of a digital pulse or more simply we can say that the output state depends on the input state.

It switches the output negative when the input goes up through a positive reference voltage.

A Noisy Schmitt Trigger input signal near one threshold can result only one switch in output value, and it goes to the other threshold in order to cause another switch.

1. Schmitt trigger - Wikipedia, the free encyclopedia

The benefit of a Schmitt trigger over a circuit with only a single input threshold is greater stability (noise immunity).

1. Schmitt Trigger Applications

The Schmitt trigger is a comparator application which switches the output negative when the input passes upward through a positive reference voltage

1. Schmitt Trigger

The required circuit is called a Schmitt Trigger. It has two possible states just like other multivibrators.