How does one go about finding the transfer function of the following op-amp PID?
I have tried to convert each component of the circuit into its transfer function representations, e.g., making each capacitor be \$\frac{1}{sC}\$. The resulting transfer function is overly complex, though, and not a simple 2nd-order ODE as is expected from what I have studied. From my research, I am supposed to find the constants \$K_i,\$\$K_p\$ , and \$K_d\$. I don't know how to find them.