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You got it partially right

The formula (and calculator) is correct for the 3db down point, but it does not take into account phase effects, which typically extend up to ten times higher than the cut-off freq. So in the example you gave, the phase of low frequencies would be affected up to appx 80Hz. Every competent designer aims for 2Hz or lower cut-off freq for a DC input filter. Be sure to enter farads in the calculator, which is a million microfarads.


berate is 8 and benign is 9

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