Re: [SI-LIST] : Improved online decoupling model

owsley@us.ibm.com
Wed, 24 Mar 1999 15:33:03 -0500

Interesting results... BTW, found one of limit parameters when I tried an
edge too fast. 500 pS may not be fast enough.
I have measured open circuit edges at 200 pS. Also, not having a place
for series R in the signal, I put it as the Rpkg.
I terminate in a balanced split term - 139 up and 139 down. I use a plane
Eeff of 4.4 as is the trace Eeff. I set the Leb to
some realistic low value around 0.1 nH for the leads V and G. And I get a
plot that looks like what I've measured at times.
Adn I find it's due to the internal C and L - I think...

I don't know what screen size you have. mine allows room to the right of
the plots to place the circuit instead of below which falls below the
screen.

I haven't determined where the i(V-NGND) and i(V-NVCC) are measured.

And the double power transmsission line... ?

Bill Owsley, Design Engineer
EMC Design - Do It First... Do It Last... But It must be Done...

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