I believe that "BW" is the 3dB bandwidth associated with a time constant which would yield the corresponding "10%-to-90% rise time". Regards, Frank -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of Rohit Sharma Sent: Monday, May 07, 2007 8:01 AM To: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] Re: Rise time bandwidth relation Hi All, Can somebody help me in understanding the derivation of the following formula for digital signals:-=20 Bandwidth =3D 0.35/Rise time. Regards, Rohit --=20 Message Classification :- [ ] Public [x] Freescale Internal Use Only [ ] Freescale Confidential Proprietary ------------------------------------------------------------------ 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: =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 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