Eric, the inductive reactance will not add linearly. Do the vector addition and you will find that the resistor value will be a lot closer to the 35.5 ohms that the resistive slope would lead to by itself. Off the top of my head, I think you will find 30-33 ohms about right. Steve At 04:11 PM 2/22/2005 -0800, eric steimle wrote: >Hi all, I'm having some trouble thinking of the right >way to calculate driver impedance using spice. I have >finally a functioning model of the driver in question >and I've been able to run some simulations with it. I >was hoping that there might be an accepted way of >calculating driver impedance out there that I don't >know about, or perhaps some literature you could point >me to. Any help would be greatly appreciated. > >Best Regards, >Eric > > > >__________________________________ >Do you Yahoo!? >The all-new My Yahoo! - What will yours do? >http://my.yahoo.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 FAQ wiki page is located at: > http://si-list.org/wiki/wiki.pl?Si-List_FAQ > >List technical documents are available at: > http://www.si-list.org > >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 > The weirsp@xxxxxxxxxx e-mail address will terminate March 31, 2005. Please update your address book with weirsi@xxxxxxxxxx ------------------------------------------------------------------ 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 FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl?Si-List_FAQ List technical documents are available at: http://www.si-list.org 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