By adding the resistor, you don't have a simple voltage follower any more. You most likely had only an oscilloscopeI wonder why the configuration of a follower is the worst case ?
I agree with dick_freebird, however, what is the purpose of the resistor?
Do you want to increase the total output resistance of the opamp?
Why and where do you expect a shortage?
A usual circuit to isolate capacitive loads repectively provide current limit uses two resistors and the capacitor suggested by
dick_freebird.
houly said:but I don't understand when they said : "The direct gain garnered by the comparison method is a-ZG/(ZG+ZF)" ; when I made the comparison, if the A is the direct gain term, the comparison is direct and the A term is : -a*ZF/(ZG+ZF) ... ?
Cf can't be "calculated" without
knowing the maximum load capacitance
houly said:..............
I would want to know what is the method to calculate the phase/gain margin of this stage, ...........
doesn't exceed? You would need several 100 pF Cf in your circuit to compensate it.the load doesn't exceed 1nF
A usual circuit to isolate capacitive loads repectively provide current limit uses two resistors and the capacitor suggested by dick_freebird.
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