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I gota think about this ...

It's not obvious to me why a large cap cannot deliver energy to the load as quickly as a small cap. A large cap has more stored energy than a small cap - why would it not be able to deliver more energy (current) to the load at the same speed as a small cap?

I agree that a larger cap will take more time to charge (draw current for a longer period of time), but it also will take more time to discharge than a smaller cap. That means, I contend, the the effective output impedance of the power supply at a given frequency decreases with increasing capacitance (of the last cap). Isn't that a good thing? Woudn't you want a power supply with the lowest possible output impedance?

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