I was just investigating this very issue. It seems that every program you use to compute these impedances comes up with different answers, sometimes wildly different. Anyone have a free program they trust with this sort of thing?
Matt On 3/14/07, Dr Bruce Griffiths <[EMAIL PROTECTED]> wrote: > Tom Clark, K3IO wrote: > > I just stumbled on an excellent tutorial on low-noise clocks -- > > National Semiconductors free downloadable "[1]Clock Conditioner > > Owner's Manual". This 88 page document is a 3.7 MB PDF. > > 73 de Tom, K3IO > > > > References > > > > 1. > > http://www.national.com/appinfo/interface/files/clk_conditioner_owners_manual.pdf > > _______________________________________________ > > time-nuts mailing list > > time-nuts@febo.com > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > > > > Tom > > Not bad except they give inaccurate formulae for stripline and > microstripline characteristic impedance. > Will these inaccurate formulae ever go away? > They've been around since the 1970's. > When with the trace widths and board thickness then in use the accuracy > wasn't too bad. > However they are not very useful for modern PCB design. > > Bruce > > _______________________________________________ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
