My question is simple.
Let's say Vin1 = 5V and Vin2 varies from 0 to 5V.
What is Vout, if the non-inverting input is not connected to ground (with or without a resistor between the + input and ground)?
In the case of a difference amplifier, standard texts always show the non-inverting input connected to ground via a resistor (Rg). In that setup, Vout is trivial, but what about the setup shown below?
Your help is appreciated!
Note: Assume that the + and - supply terminals (2 and 5) in the diagram are wired up.