Re: SPICEing The Inductance of a Trace Over a Ground Plane?

John Larkin wrote:

On Mon, 17 Sep 2007 21:34:35 -0700, "Joel Kolstad"
<JKolstad71HatesSpam@xxxxxxxxx> wrote:


"D from BC" <myrealaddress@xxxxxxxxx> wrote in message news:0daue3l50e11g711v8qpaui0qag3u1a637@xxxxxxxxxx

then using this strip model (transmission line model)
with a pulse gen and load...

pulse > ---- L ------>Hi Z load (CMOS input)
| |
C/2 C/2
| |
Gnd Gnd

..It looks like this can have severe ringing...

Yes, but this is due to your pulse having a very fast rise time. If you want to use pulses, for a given rise time make the delay through each L-C section around, say, 1/10th of the rise time and then you'll give a reasonable facsimile of the pulse at the far end.


Isn't this also called a pie filter..?

Yes it is (albeit spelling "Pi" as in 3.14..., not "pie" as in "tasty treat that's calorically dense").


I just made a peach-blackberry pie, with the last blackberries of the
season. Yum. It is round.


We turned those blackberries into Schnaps. Gin, brown sugar, blackberries, cinnamon stick, let sit for a couple months, then strain. Yum.

--
Regards, Joerg

http://www.analogconsultants.com
.

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