Given the following circuit,

I need to redraw it as a Series Shunt feedback amplifier, i.e. with the following topology:

Identifying the AC equivalent circuit seems to be easy: 12V and -12V become GND and current generator turns into an open circuit. However I have troubles identifying the amplifier net and the feedback net and the series shunt topology. Could you help me redrawing the circuit?

 

The feedback is through Q5 to point P. The rest is a differential amplifier with Q3, Q4 as active loads instead of resistors, Q1 base is the signal input.

 

hi bznm,
Welcome to AAC.
Is this is an Homework assignment, if Yes, I can move it to the Homework Forum.?
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