Mike, Great, the values are fairly close. I have 99.2 ohms from the L and C. -Kevin > Delivered-To: si-list@xxxxxxxxxxxxxx > X-Sender: ventham/pop3.btconnect.com@xxxxxxxxx > 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 > Mime-Version: 1.0 > Content-Transfer-Encoding: 8bit > X-archive-position: 1233 > X-listar-version: Listar v1.0.0 > X-original-sender: ventham@xxxxxxxxxxxxxxxxx > X-list: si-list > > > 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 > > > MIME-Version: 1.0 > > > To: si list <si-list@xxxxxxxxxxxxx> > > > Subject: [SI-LIST] Differences between HSPICE Field Solver and XTK Field > >Solver > > > Content-Transfer-Encoding: 8bit > > > X-archive-position: 1211 > > > X-listar-version: Listar v1.0.0 > > > X-original-sender: TCoyle@xxxxxxxxxxxxxxxxxxxxxxx > > > X-list: si-list > > > > > > > > > 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, | > | Quantic EMC Inc. Headquarters | > | Croft House, Chilcompton, 191 Lombard Ave., Winnipeg,| > | Somerset, UK, BA3 4JA Manitoba, Canada R3B 0X1 | > | Tel: 44 (0)1761 232191 Tel: (204) 942 4000 | > | Fax: 44 (0)7974 141685 Fax: (204) 957 1158 | > | Mobile: 44 (0)7971 553260 | > | Email: ventham@xxxxxxxxxxxxxxxxx http://www.quantic-emc.com | > > > ------------------------------------------------------------------ > To unsubscribe from si-list: > si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field > > or to administer your membership from a web page, go to: > //www.freelists.org/webpage/si-list > > For help: > si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field > > List archives are viewable at: > //www.freelists.org/archives/si-list > or at our remote archives: > http://groups.yahoo.com/group/si-list/messages > Old (prior to June 6, 2001) list archives are viewable at: > http://www.qsl.net/wb6tpu > > -Kevin ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu