I am trying to implement feedback control using transistors (instead of op amps). Part of the reason for this is that the voltages that I want to operate with are around 700V peak-to-peak and I couldn't find an op-amp that can work in that regime.
As can be seen in my circuit I use two amplifiers, one as a summer (for feedback) while the other one is part of the controller gain.
I haven't included the coupling capacitors at the input and output of each amplifier mainly because I thought they would add additional poles and complicate my trnasfer function. But I guess one can choose the size of coupling capacitor such that the dynamics they add are recessive to the desired ones.
My Question:
I would appreciate comments and criticisms of this design and how it can be improved but most importantly if the transfer functions written there are accurate reflections of the circuit itself.
Thanks
As can be seen in my circuit I use two amplifiers, one as a summer (for feedback) while the other one is part of the controller gain.
I haven't included the coupling capacitors at the input and output of each amplifier mainly because I thought they would add additional poles and complicate my trnasfer function. But I guess one can choose the size of coupling capacitor such that the dynamics they add are recessive to the desired ones.
My Question:
I would appreciate comments and criticisms of this design and how it can be improved but most importantly if the transfer functions written there are accurate reflections of the circuit itself.
Thanks
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