I think I determined their definition of decoupling versus bypass. With BC(buried Capacitance) it seems like the BC will act as both a decoupling and a bypass capacitor. By decoupling, they are stating the capacitors will supply additional energy during high frequency gate transitions(high Z) and when they are discussing Bypass they are talking in terms of EMI and eliminating unwanted frequencies (Low Z). So it seems to me they are using the terminology in the correct context.
Thanks again to all. Paul Denomme From: [email protected] [mailto:[email protected]] On Behalf Of John Woodgate Sent: Wednesday, April 16, 2008 4:33 PM To: [email protected] Subject: Re: Bypass and decoupling capacitor definitions. In message <feb0755e258881479c47feae8ba66bf106a24...@amusmsg11.viasystems.pri>, dated Wed, 16 Apr 2008, "Denomme, Paul S." <[email protected]> writes: >Now I have read some papers on buried capacitance and they state you >can remove bypass capacitors on the power distribution system and it >seems that they are using the terms "decoupling" and "bypass" >interchangeably. Would you agree with that assessment? It certainly sounds like it. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk Murphy's Law has now been officially re-named The Certainty Principle John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc The information contained in this communication and its attachment(s) is intended only for the use of the individual to whom it is addressed and may contain information that is privileged, confidential, or exempt from disclosure. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify [email protected] and delete the communication without retaining any copies. Thank you. Translations of this available: Traduction disponible chez: Traducciones disponibles en: Vertalingen beschikbaar bij: http://www.viasystems.com/dynamic_page.asp?page_symbol=email_footer ____________________________________________________________________ - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
