This is probably a dumb question but I'm not sure what voltage is on this specific node. Also ignore values, they are random.
Is it considered 0V or +V3?
Then would the voltage drop of R1 be V2 or V2 - V3?
EDIT: FULL PROBLEM The op amp used in an inverting amplifier exhibits a finite input impedance Rin. Model the op amp shown in Fig.844 ... other questions.
This is the model given:
This is the model in the answer solutions they used: also Vx = V1 - V2
My problem is understanding how they combined the inverting amplifier config with this model. Can someone step through how they did this?
I assumed that when they combined a noninverting op amp model with the model given, the v- input would be grounded, however I was wrong I guess. Other than that I think I figured it out.