I have this problem that i need to find the equation for my op amp. All the resistors are fixed, and all the voltage supplies are variables. Also all components are ideal. Anyone knows how to solve this?


ps: the result should look something like f( U1, U2, U3) = x*U1 + y*U2 + z*U3 where x, y and z are constants.
A picture of the schematics is attached.

 

Is this a school/college assignment?

 

We cannot read your scribbles. Can't your computer copy and paste opamp symbols and and type?

 

One way is to use superposition and calculate the output from each input with the other input grounded, then combine the two equations.

 

MOD NOTE: Moved from Analog and Mixed Signal Design to Homework Help.