Hi Vinod, How did you measure the voltage waveforms at the inductor? Was this the energy storage inductor? If so, that can be a tricky measurement for commercial probes to make accurately. Doug On 1/8/12 5:41 AM, steve weir wrote: > No, > > Steve. > On 1/7/2012 9:35 PM, vinod ah wrote: >> Hi all, >> After going through the all the answers provided, i went ahead suspecting >> the power supply. I find that the 1.5V switching regulator which powers the >> DDR3 controller and memories is sometimes operating in discontinuous mode >> due to lesser current drawn by the controllers& memories (by seeing the >> voltage waveforms at the inductor of the switching regulator). So this >> discontinuous mode of operation is the reason for EMI issue i am facing? >> >> Regards >> Vinod A H >> >> -- >> ------------------------------------------------------- >> ___ _ Doug Smith >> \ / ) P.O. Box 1457 >> ========= Los Gatos, CA 95031-1457 >> _ / \ / \ _ TEL/FAX: 408-356-4186/358-3799 >> / /\ \ ] / /\ \ Mobile: 408-858-4528 >> | q-----( ) | o | Email: doug@xxxxxxxxxx >> \ _ / ] \ _ / Website: http://www.dsmith.org >> ------------------------------------------------------- ------------------------------------------------------------------ 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 Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu