It that's the case, on a spectrum analyzer you will see a spur at the ringing frequency surrounded by sidebands at +/- the switching frequency and harmonics of it, in a classic "Christmas tree" shape. Orin On Fri, 6 Jul 2007 15:40:14 -0400 "Mikhail Matusov" <matusov@xxxxxxxxxxxx> writes: > ----- Original Message ----- > From: "Istvan Novak" <Istvan.Novak@xxxxxxx> > > > > It might be worth checking to see if the spurious signal that pops > up is > > a ringing on the switching edge rather than the harmonic of the > > switching frequency. If it is ringing, you may be able to reduce > it > > substantially either by using an appropriate second source of > changing > > the converter layout (in case it is your embedded design). > > > > Thank you Istvan. That's an interesting idea. I'll see into it... > > > /Mikhail > ------------------------------------------------------------------ ------------------------------------------------------------------ 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