Hi, I want to know more details about HSTL and SSTL. Please guide more about the same. ARUN -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of Peterson, James F (EHCOE) Sent: Wednesday, September 20, 2006 5:16 AM To: Benny Yan Cc: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] Re: OUTPUT IMPEDANCE CALCULATION [IBIS] by the way, in the equation I wrote below the "3D" is a formatting artifact and shouldn't be in the equation... (I'll try again to write here); Vout <equals> Vin * (Zo/(Zo+Zs)) ...and solving for Zs -Jim ________________________________ From: Benny Yan [mailto:bennyzhi@xxxxxxxxx] Sent: Tuesday, September 19, 2006 8:10 PM To: Peterson, James F (EHCOE) Cc: torocar@xxxxxxxxx; si-list@xxxxxxxxxxxxx Subject: Re: [SI-LIST] Re: OUTPUT IMPEDANCE CALCULATION [IBIS] Eric Bogatin mentioned a method in his book<Signal Integrity:Simplified>. Benny Yan On 9/19/06, Peterson, James F (EHCOE) <james.f.peterson@xxxxxxxxxxxxx> wrote: Another method to establish the source impedance (Zs) of a driver from an IBIS model is in a simulation (still using Ohms law): Create a circuit with the ibis model driving a very long transmission line (12 inches) with a known trace impedance (Zo). Drive the line both high and low and observe the porch in the waveform. The porch is caused by the ratio of Zs and Zo. Zs can be solved by rearranging this very familiar equation : Vout =3D Vin * (Zo/(Zo+Zs)) ...solve for Zs, Vout is Vporch and Vin is = the total voltage swing The porch will last as long as 2x the propagation time of the T-line. -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of Scott McMorrow Sent: Monday, September 18, 2006 4:48 PM To: torocar@xxxxxxxxx Cc: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] Re: OUTPUT IMPEDANCE CALCULATION [IBIS] Carlos Ohms law (Z=3D V/I). You have a V/I curve at min/typ/max device = corners. regards, Scott Scott McMorrow Teraspeed Consulting Group LLC 121 North River Drive Narragansett, RI 02882 (401) 284-1827 Business (401) 284-1840 Fax http://www.teraspeed.com Teraspeed(r) is the registered service mark of Teraspeed Consulting Group LLC Carlos Toro wrote: > Hello members of the SI list. > Does anyone has experience with calculating the output impedance of a=20 > microcontroller pin given its IBIS model?. > > I don't have access to the silicon yet, just the IBIS for now. I=20 > intend to match impedances of critical PCB traces of our design. > > Thanks in advance. > > > =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 FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl?Si-List_FAQ List technical documents are available at: http://www.si-list.org 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 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 FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl?Si-List_FAQ List technical documents are available at: http://www.si-list.org 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 ------------------------------------------------------------------ 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 FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl?Si-List_FAQ List technical documents are available at: http://www.si-list.org 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 -- No virus found in this incoming message. 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