Steve Corey Wrote: > I don't own Hall's book, but I would presume that the > analysis was done assuming constant RLGC parameters. A model with > frequency-dependent RLGC parameters, however, dissipates additional > signal energy at higher frequencies. As a result, certain segment > length restrictions get relaxed as compared to the frequency-independent > case, which is the limiting case. Hi Steve: Thank you for your comments. Each segment parameter (e.g. R_segment, L_segment, C_segment, G_segment) can be calculated by dividing the total value ( for that parameter) by the number of segments. For example, calculating L_segment involves: L_total = Zo * TD Where, L_total is the total line inductance, Zo is characteristic impedance and TD is signal propagation time delay [e.g. TD = (Line Length ) / ( propagation velocity) ] and L_segment = L_total / (Number of segments) Similarly, the total line capacitance is : C_total = TD / Zo and C_segment = C_total / (Number of segments) Above expressions indicate that frequency dependence of L_segment and C_segment are governed by frequency variations of TD and Zo. Of course, modeling a lossy requires calculating R_segment and G_segment in addition to L_segment and C_segment. Best Regards, Abe Riazi ServerWorks ------------------------------------------------------------------ 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