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Old 17th May 2011, 01:14 AM   #41
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Join Date: Nov 2010
Location: The City, SanFrancisco
effebi

I still think what I described is reasonable (you Italians just like to argue )
There may be some strict definitions of proper zero / poles definitions which I have long forgotten, especially dealing with zeros in the feedback.
As I see it this capacitor forms a zero in the feedback path, that is it increases the amount of feedback (less attenuation of the output).
I was simplifying by considering the feedback path as part of the open loop gain where then the capacitor forms a zero then a pole with its smaller series resistor.
Conversely, you can on a bode plot, put this zero in the feedback (which is drawin the same as a pole in the OLG, maybe thats the source of our different points of view).

Just kidding about Italians yes my last name ends with an I
Ciao
-Antonio
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