Good day to you all,

I have been struggling with getting the transfer characteristics of the circuit below.
I know I'm missing something in my head, but I cannot for the life of me remember how current sources and complex impedance interact.


Any help is greatly appreciated, thank you very much in advance.

 

Well, Ohm's law still applies. So, if you recall Norton <-> Thevenin transforms (converting a current to a voltage kind of deal), then you should be good to go.
As a refresher:
\[V = IR \rightarrow V = IZ\]
Things only get weird when you deal with complex power (\(P = VI^*\))
Hope this helps gets you started!

 

The op amp model on page 12 figure 5 uses a capacitor Cc dealing with the miller effect but indirect feedback can also play a role in the model.
https://scholarworks.uark.edu/cgi/viewcontent.cgi?

A specific Darlington pair equivalent when extented fig 3 seems to model alright as an ideal in simulation.
https://www.iosrjournals.org/iosr-jeee/Papers/Vol10-issue2/Version-1/J010217780.pdf

 

Hint:
For 1st stage:

v = i . Zp1 where Zp1 = ZC1 || R1
now write transfer function in terms of v, Vin and ω