NNTP-Posting-Date: Mon, 13 Jan 2003 14:51:12 -0600
From: Barry Lennox
Subject: Re: Smith Charts
Date: Tue, 14 Jan 2003 09:53:29 +1300
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On Mon, 13 Jan 2003 15:46:08 +0000, Paul Burridge
>Does anyone still use Smith charts any more or have they been
>surpassed now by something a little less formidable looking or
I use it quite a bit, agree with the other poster, would not be
without it. Philip H Smith did the world a huge favour.
They are not that formidable, there's probably dozens of tutorials on
the Net, try a google search.
There are several implementations on PCs as well, some of which are
freeware. One that is nice to play with is MIMP, Motorola Impedance
Matching Program. I got it from the Motorola website perhaps 3-4
years back, it should still be there.
Another good one is MicroSmith by Wes Howard, but I'm sure it's not
free. It is on a CD that he includes with some of his books.
The very old, 1969, "RCA Power Circuits" book has some good stuff on
matching with Smith Charts, (pages 276- 293) but they don't call it
that, they call it a "Impedance-Admittance Chart" prob cos they didn't
invent it ! Nevertheless, it's still very useful IME. They book will
be well out of print now, but I often see used copies around.