Thus the comparator with positive feedback is called Schmitt trigger or regenerative comparator. The inverting schmitt trigger mode produces opposite polarity output. This is fed back to the ...

A single-supply, inverting Schmitt trigger was detailed in a previous Idea For Design (“Comparator Features Symmetrical Thresholds,” by Samuel Kerem, Electronic Design, March 6, p. 124).

Many designs exist for logic-based astable multivibrators, one of the simplest being an RC feedback loop around a single inverting Schmitt trigger inverter (Figure 1). The output charges the capacitor ...