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Re: Cap loaded

"The non-linearities do not go away."

And, I predict, they won't go away until you (a) find a more linear device; (b) devise a more linear circuit; or (c) find a way to apply more NFB.

BTW, compensation usually makes high-f distortion worse, which is what I find most interesting here. Evidently neither the compensation nor the capacitive load induce slewing at this point.
This implies a wideband, low output impedance, meaning that the feedback is effective to a relatively high f. This is what we want.

You can also correlate this parameter with output impedance by looking at Zo at various f's and input levels.

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