- Published in issue 1/2019 on page 100
Opamp Schmitt Triggers
Circuits and calculations
Schmitt triggers are standard circuits in electronics, so you might think there’s nothing special about them. All you need is an opamp and a couple of resistors, right? That’s true if you don’t need precisely defined hysteresis and switching thresholds. But if you want to determine these values precisely and/or optimize them for standard resistance values, you need suitable circuits and the right formulas. Here we present both of these.