Op-Amps, Comparator Circuit by Renesas

Publisher: Renesas. www.renesas.com/en/support/engineer-school/electronic-circuits-03-op-amps-comparator-circuit

Introduction to Electronic Circuits, session 3 of 3. Op-Amp Basics (1), Figure 2 and its resistance-ratio derivation, gives the inverting closed-loop gain $V_{\mathrm{out}}/V_{\mathrm{in}}=-R_2/R_1$. Op-Amp Basics (2), Figure 3, gives the non-inverting gain $1+R_2/R_1$. The opening discussion distinguishes signal connections from supply connections and describes negative feedback. No individual byline or publication date is stated here.