Hello again Thanks for all the replies. Now I have a rough feeling of what people cu= rrently think, I'll go through all the SI-List archives. And a special thanks for not hassling me on my abysmal typing!! (I hadn'= t yet had a coffee.) Cheers, Richard >>> "Alex Slavec" <aleksanders@xxxxxxxx> 19/08/2003 10:21:49 a.m. >>> Hi Richard, As you can expect, Cadence Specctraquest will provide the most integrated solution when using Allegro; both use the *.brd database file. Depending on your SI speeds (>3GHz), you may need to add HSpice to your option list in addition to the power plane analysis package. Specctraquest can take either your physical track topology or the Manhattan length for a non-routed signal and then by providing appropriate models the tool will draw appropriate waveforms at various points on along the signal path. Like many other board level simulators, one of the disadvantages with SpecctraQuest is the lack of detailed modeling ability, in other words, IBIS model is the only type of device model that can be used effectively. Therefore, reliable behavioral models have to be evaluated prior to any analysis. Cadence claimed to have demonstrated this product to 3GHz. For detailed analysis above the 3GHz level, Cadence recommends using Hspice models. At the 10GHz level, behavioral models may no longer be valid meaning that IBIS models should not be operated at this level.=20 I don't have any hands on experience with the latest version of Hyperlynx, however I believe that this version can import an Allegro file; perhaps someone can verify this, and if so is the import 100% effective. The Sigrity tools can import layout info from the Allegro *.brd file to be used in power plane analysis. I hope this helps. Cheers, Alex -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] = On Behalf Of richard moffat Sent: Tuesday, 19 August 2003 6:57 AM To: < Subject: [SI-LIST] SI software for Cadence Hi all We are in the telecommonunication indistry. What are people using for SI=3D =3D20when they have Cadence Allegro as the layout package? (I'm referrin= g =3D to both SI and powerplane analysis.) I have so far narrowed it down to (in rough order) =3D20- SpecctraQuest =3D20- Sigrity =3D20- HyperLynz (GHz option) =3D20- Ansoft =3D20- Mentor tools? Any success stories or sob stories would be appreciated ! Cheers, Richard NOTICE: This message contains privileged and confidential information intended only for the use of the addressee named above. If you are not the intended recipient of this message you are hereby notified that you must not disseminate, copy or take any action in reliance on it. 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