Eric- The first 3 that come to mind are: Sonnet Lite (3D solver) http://www.sonnetusa.com/products/lite/ Ansoft Designer SV (simulator) http://www.ansoft.com/downloads.cfm Ansoft Maxwell SV (2D Field Solver) APLAC Student Version (RF Design Tool) http://www.aplac.com/ -Ray Anderson Xilinx Inc. -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of Eric Bogatin Sent: Wednesday, June 20, 2007 9:08 AM To: si-list@xxxxxxxxxxxxx Cc: eric@xxxxxxxxxxxxxxx Subject: [SI-LIST] free signal integrity analysis tools Hi folks-=20 =20 I am compiling a list of free software tools for signal integrity analysis which I will publish in my PCD&M column in the next few months. If anyone has a recommendation for a free version of a tool, such as a lite version of a full featured tool, or an online tool, please pass me a link off line. Vendors are invited to send me a note as well if you have a lite or student version. =20 Since there are so many SPICE tools and online impedance calculator tools, I am only going to list one or two of them. I am more interested in link analysis tools, circuit simulators that include differential pair and lossy line models, 2D field solvers, 3D planar and 3D full wave. I will evaluate three key metrics: ease of use, sort of problem it can analyze and limitation of the free version. Any input for this column would be appreciated. =20 Thanks =20 --eric =20 ------------------------------------------------------------------ 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 technical documents are available at: http://www.si-list.net 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