[SI-LIST] Time domain AMS-SI tools
- From: "Mark Burford" <Mark_Burford@xxxxxxxxxxx>
- To: <si-list@xxxxxxxxxxxxx>
- Date: Wed, 30 Nov 2005 11:23:18 -0000
Hello SI experts...
I am interested to find out how such tools as Cadence PCB SI and other
good time domain SI tools perform time domain simulation and include
frequency dependent effects such as skin effect, dielectric conductance,
proximity effect etc.
As is initial stab at understanding to include such effects one must
tell the tool at which frequency we would like the simulation run and an
internal 2D field solver will allocate appropriate parameters for skin
effect etc at that frequency and then run waveforms through the model.
In the time domain however surely there is little concept of a single
frequency but we have bandwidth instead. So for a long run of 1's or
0's how would the tool cope with effects such as skin effect which
change the resistance of the trace dependent on the signal passing the
it which have varying rise times are 1 or 0 for long periods. Surely the
tool cannot allocate a single resistance to the trace for instance to
cover a 101010 pattern and a 111111 pattern?
Your thoughts and corrections are very welcome please.
Thanks in advance
Mark
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