Specctra is very good!VIVIET said:WG2002 is high end design tool but very expense. It costs around $36K for the complete package + maintenance fee. PSD14 is more affordable but the auto-router is not as good.
Hope this helps
Actually, in Mentor Graphics (formerly Innoveda) PowerPCB also have this option (High Speed Design) in thier package. very useful especially during manual routing with online DRC. It can even specified the minimum and maximum length of the trace.flatulent said:He swears by a Cadence product that lets him manually simultaneously route the two differential lines with automatic spacing between them and equal lengths.