Table of Contents
Schmitt trigger makes a comparator circuit more stable.
Adding a resistor from the output of an op amp, to the non inverting input, adds hysteresis due to positive feedback.
- Reference voltage: A voltage that you want to compare another voltage to.
- Signal voltage: A changing voltage that you want compared to another voltage.
The output pulls the voltage at the non inverting input, a bit closer what the output voltage is.
That means that the signal, has to overcome a little extra voltage, in order to change the output to the other state.
- Hysteresis: A middle ground voltage that the signal has to overcome in order to change the output state. Prevents rapid output switching due to small changes, or noise, near the reference voltage.
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