I hope Randolph means this way : 'Dividing the power plane is good and will improve the situation but dividing the ground plane will only have negative effect.' Bharath
From: Joe Randolph <[email protected]> To: [email protected]; [email protected] Sent: Wednesday, 16 January, 2008 7:29:45 PM Subject: Re: Gnd/Pwr Planes On 1/16/2008, [email protected] wrote: What are some of the causes that create breaks or slots in ground or power planes in multilayer boards? Voltage partitioning comes to mind and closely spaced vias. Others? It is very common to partition the power and ground planes to help control the return currents for various subsystems on a board. The idea is to keep the return currents localized within each subsystem and then carefully manage the return currents between the subsystems using "bridges" between them. This method can be very effective if done correctly, but it can actually make things worse if done incorrectly. Joe Randolph Telecom Design Consultant Randolph Telecom, Inc. 781-721-2848 (USA) [email protected] http://www.randolph-telecom.com <http://www.randolph-telecom.com/> - ---------------------------------------------------------------- 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 _____ Unlimited freedom, unlimited storage. Get it now <http://in.rd.yahoo.com/tagline_mail_2/*http://help.yahoo.com/l/in/yahoo/mail/yahoomail/tools/tools-08.html/> - ---------------------------------------------------------------- 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
