Keywords: Op-Amp Schmitt Trigger.svg A circuit diagram of a Schmitt trigger made using an operational amplifier Hysteresis from <math>\frac -R_1 R_2 V_ sat </math> to <math>\frac R_1 R_2 V_ sat </math> own 2009-01-26 Inductiveload Own work all rights released Public domain Schmitt trigger circuits Operational amplifier circuits SVG operational amplifiers |