folded cascode slew rate limit

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ray.deng

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With a folded cascode of the first stage and common source as the second stage. How to calculate the slew rate?

The value I calculated by Itail/Cc, that is the tail current of the differential divided by compensation capacitance, is far different than the one I simulated. Should we consider the miller effect here? It seems the variance is about the gain of the second stage.

 

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