I have been having quite a bit of difficulty analyzing this op - amp. Can someone explain how to find the voltage A?
I know there are a couple of typical configurations of the op - amp circuit, including a summer, amplifier, open loop configuration, and differential op amp. My issue arises here because this is an op - amp circuit that is completely different from anything I have seen before.
So far, I have tried to use KCL by doing at the node at the negative terminal by doing (10 - 11) / 110k = (11 - Vout) / 3M, and solving for Vout, which gives me Vout = 38.2727 V. However, this is not the output I am expecting (my software says it should be 11V at A. Mainly, my problem lies in the fact that there is a split branch between the 3M, 70 ohms, and 250 ohms, and I'm not sure what is in parallel with what and how I can simplify this area. I am really confused as to the approach to solve this problem and would appreciate any help. Thank you!
Also, R3 is 3M, or 3,000,000 ohms.