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
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Designing with op-amps and single supplies – Stompville
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Avoiding Op-Amp Instability Problems In Single-Supply Applications | Analog Devices
Avoiding Op-Amp Instability Problems In Single-Supply Applications | Analog Devices
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