FreeLists / si-list / [SI-LIST] Re: Differences between HSPICE Field Solver and XTK Field Solver

[Kevin Ko <Kevin.Ko@xxxxxxx>]

Mike,

Great, the values are fairly close. I have 99.2 ohms from the L and C. 

-Kevin

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> Date: Thu, 01 Nov 2001 09:57:03 +0000
> To: Kevin.Ko@xxxxxxx, si-list@xxxxxxxxxxxxx, TCoyle@xxxxxxxxxxxxxxxxxxxxxxx
> From: Mike Ventham <ventham@xxxxxxxxxxxxxxxxx>
> Subject: [SI-LIST] Re: Differences between HSPICE Field Solver and XTK Field 
Solver
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> 
> Tim, Kevin,
> 
> I got 575.1 nH/m and 56.64 pF/m giving a Z of 100.38 ohms using
> our EZ Greenfield 2d boundary element based field solver.
> 
> I also used Er of 4.5, but will re-run it if you have the correct value.
> 
> At 18:10 31/10/01, Kevin Ko wrote:
> 
> 
> >Tim,
> >
> >This is what I got in SpecctraQuest, assuming you are using Er of 4.5:
> >
> >566.5 nH/M
> >57.46 pF/M
> >
> >Could you check your units again.
> >
> >
> >
> > > Delivered-To: si-list@xxxxxxxxxxxxxx
> > > Date: Wed, 31 Oct 2001 12:11:16 -0500
> > > From: tcoyle <TCoyle@xxxxxxxxxxxxxxxxxxxxxxx>
> > > X-Accept-Language: en
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> > > To: si list <si-list@xxxxxxxxxxxxx>
> > > Subject: [SI-LIST] Differences between HSPICE Field Solver and XTK Field
> >Solver
> > > Content-Transfer-Encoding: 8bit
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> > >
> > >
> > > Dear Si List,
> > > I am using the microstrip equation in Howard Johnson's book to calculate
> > > the impedance. So given a w=8mil, t=1.37mil, and h=21mil, I get an
> > > impedance
> > > of about 100 ohms. When I use the XTK field solver, I get an L=14.5nH
> > > and a C=1.4pF. When I use the HSPICE field solver, I get an L=65nh and a
> > > C=6.5pF.  They both give me an impedance of 100 Ohms but are quite
> > > different values. I think the XTK values are correct, so I'm wondering
> > > about the HSPICE field solver. Has anyone compared results between these
> > > two tools?
> > >
> > > Thanks
> > >
> > > Tim
> > >
> > >
> > >
> > >
> >
> >-Kevin
> >
> >
> 
> Regards
> 
> Mike
> ________________________________________________________________
> | Mike Ventham - Vice-President Engineering,                   |
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> 

-Kevin


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