Add hysteresis to a voltage comparator

摘要

Positive feedback is a typical technique for distributing hysteresis around a comparator, provid-ed that you have a resistive path be-tween the comparator's output and the noninverting input. Positive feedbackrnforms two threshold voltages that have (or assume) fixed values. In addition, they depend on the saturation values of the comparator's output stage. Plus, the load conditions affect their accuracy.