Hello, one stupid question: I thought PRBS is a well defined sequence (with undefined starting = point). So how could the Excel int(rand()+0.5) function create this sequence ? I expected this to be (more or less) random! regards hermann -----Urspr=FCngliche Nachricht----- Von: Keskinen, Kai [mailto:KaiKeskinen@xxxxxxxxxxxxx] Gesendet am: Freitag, 22. November 2002 13:49 An: 'Raymond.Anderson@xxxxxxx'; si-list@xxxxxxxxxxxxx Betreff: [SI-LIST] Re: more on PWL statement generation for PRBS simulatio n in spice The same thing can be easily done using the int(rand()+0.5)function in excel. Cheers, Kai Keskinen Signal Integrity Advisor Solectron Technical Center 425 Legget Drive,=20 Kanata, ON K2K 2W2 kaikeskinen@xxxxxxxxxxxxx www.solectron.com -----Original Message----- From: Ray Anderson [mailto:Raymond.Anderson@xxxxxxx] Sent: Thursday, November 21, 2002 4:00 PM To: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] more on PWL statement generation for PRBS simulation in spice Follow on to my recent posting on generation PWL PRBS excitation for spice simulations. I mentioned that one could take the recently posted Perl code and modify it to output a PWL statement. Check the Microsim app note document at: http://www.pspice.com/upload/appnotes/appnts.pdf =20 On page 231 of the pdf file a chapter entitled "Test Analog circuits with Random Digital Data" begins. On page 233, figure 124 is a simple program listing in BASIC that allows one to generate a PWL statement based on random data generated by the BASIC rand() statement. The logic in that listing could be ported into the PERL prbs code to create an integrated program. =20 -Ray ------------------------------------------------------------------ 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: =20 //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages=20 Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu =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 archives are viewable at: =20 //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages=20 Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu =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 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