[SI-LIST] Re: Specctraquest Model ?
- From: "John Horner" <horner@xxxxxxxxxxx>
- To: <kenbeach@xxxxxxxxxxxxxxxxxx>, <si-list@xxxxxxxxxxxxx>
- Date: Thu, 14 Mar 2002 16:44:23 -0600
Hi Ken,
Your guess of what the circuit looks like is correct. It would have 2 =
lines attached, and goes between layer1 to layer 27 (you have to look at =
the xsection to see which layers these are. Be sure to count the =
dielectrics and planes also)
Regards,
John Horner
-----Original Message-----
From: Ken Beach [mailto:kenbeach@xxxxxxxxxxxxxxxxxx]
Sent: Thursday, March 14, 2002 3:19 PM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Specctraquest Model ?
Hi,
I have a question regarding the meaning of the Signal Explorer net list
model for a via. The model definition is immediately below:
.subckt VIA_A_VIA_25C17CSM_L1A0W600L27A-135W300_FST_4978
+1 2
CL1A0W600 1 0 2.18755e-13
CL27A-135W300 2 0 2.18755e-13
RLL1A0W600_L27A-135W300 1 2 1e-7 L=3D2.33327e-09
.ends VIA_A_VIA_25C17CSM_L1A0W600L27A-135W300_FST_4978
I think this model definition is defining a pi network with a 0.218pf
capacitor on the left, a 0.218pf capacitor on the right and a resistor =
of
10^-7 in series with a 2.33nH inductor in the arm bridging between nodes =
1
and 2. However, we can't find in, the help manual, a clear description =
of
the RLL1A0W etc. bridging arm. So, here we are guessing. Does anybody =
know
what that bridging arm statement is saying?
Thanks in advance
Ken
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