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In filter design the traditional way is to use a ladder topology, as in File:Cauer lowpass.svg - Wikipedia, the free encyclopedia.
If you sit down and work out the impedence at the input, it turns out to be:
\[\frac{1}{sC_1 + \frac{1}{sL_2 + \frac{1}{sC_3 + \cdots}}}\]
So, by finding the...
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