Hi LvW, my equation is correct. It is also proven by ringo's simulation.Sorry, CHECKMATE, you are not correct.
The output voltage is: Vout=2.5*(1+20)-2.59*20=-1.8 volts.
Consequence: cannot work with single (positive) supply.
Ringo, what about the resistor "elsewhere on the circuit" ???
Yes i know its inverting but i thought thats the only way you can design differential amps, are you saying you can swap the inputs round?
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