![For a single-supply inverting op amp (in this case 9V), I often see a resistor connecting +in to virtual ground – but not always. Is there a handy rule for determining the For a single-supply inverting op amp (in this case 9V), I often see a resistor connecting +in to virtual ground – but not always. Is there a handy rule for determining the](https://preview.redd.it/fzo65a3ht5781.png?auto=webp&s=9d2e7c69b83db59c75146098f288cb344c33e439)
For a single-supply inverting op amp (in this case 9V), I often see a resistor connecting +in to virtual ground – but not always. Is there a handy rule for determining the
![operational amplifier - Why does this single supply non inverting Op-Amp saturate? - Electrical Engineering Stack Exchange operational amplifier - Why does this single supply non inverting Op-Amp saturate? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/srMDu.png)
operational amplifier - Why does this single supply non inverting Op-Amp saturate? - Electrical Engineering Stack Exchange
![operational amplifier - Single Supply Op - Amp circuit not working - Electrical Engineering Stack Exchange operational amplifier - Single Supply Op - Amp circuit not working - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/E4J7l.png)
operational amplifier - Single Supply Op - Amp circuit not working - Electrical Engineering Stack Exchange
![operational amplifier - Output of Inverting opamp with single supply - Electrical Engineering Stack Exchange operational amplifier - Output of Inverting opamp with single supply - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/MuS4P.png)
operational amplifier - Output of Inverting opamp with single supply - Electrical Engineering Stack Exchange
![operational amplifier - Single supply inverting op amp: output not as expected - Electrical Engineering Stack Exchange operational amplifier - Single supply inverting op amp: output not as expected - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/q03ml.png)