Hi All, I keep generating more and more lab data which I present in my short webinarsbefore incorporating some of the data into larger presentations such as my Boulder City, NV seminars, PCB West and at my courses at the Universityof Oxford later on. A small subset of the data is sometimes published in my Technical Tidbits. Doug Here are two for next Thursday: Thursday, November 20th @ 10:00 a.m. Pacific time: [1][2]Electrical Resonances in Physical Structures[3] (A novel approach to solving analog and digital design problems with application to SI, EMC, and ESD issues) New material added that leads to a surprising design rule for PCBs of four ormore layers! * Click here[4] for an outline and description * Click here[5] for a registration form * Thinking of an electronic system as a collection of coupled tuned resonant circuits is a novel way of approaching a system design from ICs, to PCBs, to cables, to entire systems. This approach can expose design problems and fixes for operational, SI, EMC and ESD problems and applies to both analog and digital designs. Every design engineer needs to attend this webinar! EMC engineers will also find this webinar very useful in their work as well. Next presentation: Thursday, November 20th @ 10:00 p.m. Pacific time: Switching Circuits in Electronic Systems[6] (Problems and solutions for the design engineer) * Click here[7] for an outline and description * Click here[8] for a registration form * Switch mode power supplies (at system and board level) and other switching devices like class D amplifiers and pulse width modulation controlled devices have caused a lot of noise problems over the years resulting in a lot of weekends and evenings at work for engineers. This webinar will discuss the four modes of noise generation in switching circuitsand how to deal with them. The fourth mode is not well known yet causes many of the problems due to switching circuits and is not covered in specifications. Did you know that switching circuits generate noise that can cause intermittent operation of systems with problems occurring once per houror even less frequently? How this can happen will be discussed and ways of debugging this type of problem will be covered. Examples will be discussedwhere switching noise generated in one part of a system caused problems in remote parts of the system, including one case where a hard drivewas corrupted from a meter away and the drive was not even connected to the noisy supply causing the problem. Recommendations from system level to PCB level are given, right downto the type of inductors/transformers recommended for supplies mounted onPCBs. -- University of Oxford Tutor Department for Continuing Education Oxford, Oxfordshire, United Kingdom -------------------------------------------------------------- ___ _ Doug Smith \ / ) P.O. Box 60941 ========= Boulder City, NV 89006-0941 _ / \ / \ _ TEL/FAX: 702-570-6108/570-6013 / /\ \ ] / /\ \ Mobile: 408-858-4528 | q-----() | o | Email: doug@xxxxxxxxxx[9] \ _ / ] \ _ / Web: http://www.dsmith.org[10] -------------------------------------------------------------- --- Links --- 1 http://www.emcesd.com/webinars.htm#Wireless 2 http://www.emcesd.com/webinars.htm#Wireless 3 http://www.emcesd.com/pdf/EResonance.pdf 4 http://www.emcesd.com/pdf/EResonance.pdf 5 http://www.emcesd.com/pdf/EResonance_regform.pdf 6 http://www.emcesd.com/pdf/HFSwitching.pdf 7 http://www.emcesd.com/pdf/HFSwitching.pdf 8 http://www.emcesd.com/pdf/HFSwitching_regform.pdf 9 mailto:doug@xxxxxxxxxx 10 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 forum is accessible at: http://tech.groups.yahoo.com/group/si-list 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