Test & Soldering Equipment On-line Store

D.E.V.I.C.E.
(Wiki)Calculators
Services

Schmitt trigger with adjustable hysteresis threshold

If it is necessary to change the hysteresis thresholds, you can use the circuit shown in Fig. 1. The circuit shown does not have the positive feedback typical of a Schmitt trigger.

Fig. 1. Schmitt trigger with adjustable hysteresis threshold

The principle of operation of the circuit is as follows. By changing the voltage V_ref1 and V_ref2, the thresholds can be adjusted. Thus, the entire range during input signal processing is divided into three parts.

When V_in is less than V_ref1, comparator K2 outputs "1", which goes to the "R" input of the trigger and switches it to the "0" state.
When V_ref1 < V_in < V_ref2, the output of both comparators is "0", and the trigger stores the previous state, whatever it was.
When V_in is greater than V_ref2, "1" appears at the output of only the first comparator, and throws the RS trigger to the "1" state.

Back to the list

Search by section D.E.V.I.C.E. services

Wiki Chat

Measurement History Events

Yesterday

Today

Tomorrow

03/20/2011

and annually

International Day of Happiness

Units Converter

Schmitt trigger with adjustable hysteresis threshold

D.E.V.I.C.E. on Request