The discussion revolves around designing an operational amplifier (op-amp) circuit to achieve a specific output function, Vout = 5*V1 - 4*V2. The focus is on the theoretical and practical aspects of circuit design, including resistor selection and op-amp configurations.
Participants do not reach a consensus on the optimal configuration or the number of resistors required for the design. Multiple approaches and configurations are discussed, indicating ongoing exploration and uncertainty.
There are unresolved questions regarding the specific connections of inputs and the implications of using different numbers of resistors in the circuit design.
rasen58 said:Homework Statement
Design an op-amp based circuit to produce the function
Vout = 5*V1 - 4*V2
Homework Equations
The Attempt at a Solution
I have no idea how to approach this. I know there are two voltages on the two inputs, and that the feedback resistors should be going to the negative input, but how do I pick the values for the resistors?
rasen58 said:I think I got it. I can use one op amp and there is a voltage source on each input. So using feedback to the negative side, I can use KCL on the node there and once rearranging that equation, I tried values for the two resistors to make them equal the equation.