Pi filter Bode plot

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rocky79

Joined Apr 23, 2010
6
I am trying to understand the filtering effect of a pi filter on various frequencies. The hard part is deriving the transfer function for that pi filter.
The goal is to plot the bode plot and manipulate the cut-off frequencies to achieve those levels in the chart.
This filter is going to be used at the input of a buck regulator that is operating at 250 khz.

What would be the best way to approach the filter design?

Your help is greatly appreciated.
 

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