# Transfer characteristic of of a 2-stage transistor amplifier.

#### nepowoBoy

Joined Jan 7, 2022
3
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.

#### ZCochran98

Joined Jul 24, 2018
192
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!

#### Irving

Joined Jan 30, 2016
2,417
Hint:
For 1st stage:

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