operational amplifier - Why is non-inverting op-amp input resistance on a tee to ground? - Electrical Engineering Stack Exchange
Non-inverting Operational Amplifier Configuration
Does connecting the non-inverting terminal to ground using a resistor make any difference in an ideal op-amp? - Quora
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Inverting Operational Amplifiers Working and Applications
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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