From: [email protected]
Date: Thu May 17 2001 - 12:50:02 PDT
3.14 is terminated PI, 22/7 is unterminated PI. - - - Sorry, no self restraint.
Actually, I'm thinking you might be referring to a PI-matching pad, or a
PI-filter such as the RF guys often use to match transmission lines, filter
power lines, etc.
Grab any linear filter book for references and formulas.
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