Electronic – Oscillation between the inverting input and output of opamp


I am looking into a circuit simlar to what is attached here, when I place a probe between the opamp's output and the inverting input – I see oscillation when V1 = 0V. But when voltage is applied to V1 (i.e 10V), the oscillation is gone. Is it normal? Or something is going wrong with my circuit and I need to compensate for it?


simulate this circuit – Schematic created using CircuitLab

Best Answer

Your question doesn't show how you're powering the op amp, but I'll take a wild guess that you're not giving it a negative supply, just ground. The chip's input voltages need to be at least a volt away from the supply rails to operate properly. E.g. with a 0V...12V supply, both the inputs need to be between 1V...11V.