 Inverting Comparator With Hysteresis Circuit by Texas Instruments

Primary source: www.ti.com/lit/an/snoa997a/snoa997a.pdf

Verified locator: Texas Instruments Analog Engineer’s Circuit, document SNOA997A, July 2018 revised August 2019. Design Goals and Description, p. 1: 2.5 V upper and 2.2 V lower thresholds and noise-induced transitions; pp. 2–3: state-dependent threshold analysis. The revision date is distinct from the PDF footer copyright year.