The most common mistakes carried out on PCB are:
1 Use 2-layer instead of multi-layer boards 2 Permit high F clocks to go trough long traces (> 4 Mhz) 3 Place connectors all over the surface instead of corner or edge 4 Let input and out lines of analog and power circuits run unfiltered to the cable 5 Use metal can oscillators (too high current drive) 6 Empty copper-fill grounded through thin traces (copper fill is of no use to emi) 7 Create 2 different ground planes that will compete for "real emc ground". 8.... Regards, Gert Gremmen ce-test qualified testing ============================== http://www.cetest.nl Do you know our CE/E mark True type Font ? http://www.cetest.nl/cettf.htm ============================== >-----Original Message----- >From: owner-emc-p...@ieee.org [mailto:owner-emc-p...@ieee.org]On Behalf >Of rehel...@mmm.com >Sent: Friday, January 21, 2000 1:48 PM >To: emc-p...@majordomo.ieee.org >Subject: EMC Circuit Board Design > > > > > >Dear List-Members, > >I am requesting information/opinions/etc. on the following: > >When circuit boards are designed, what are the common mistakes that the >circuit board designers make regarding EMC (multi-layer boards in >particular)? > >You can respond to me directly but I would prefer a response to the list as >I believe that the question is of interest to many on this list-server. In >either event I will compile the responses and resend the compilation later. > >Thanks for your time, > >Bob Heller >3M Company > > > >--------- >This message is coming from the emc-pstc discussion list. >To cancel your subscription, send mail to majord...@ieee.org >with the single line: "unsubscribe emc-pstc" (without the >quotes). For help, send mail to ed.pr...@cubic.com, >jim_bac...@monarch.com, ri...@sdd.hp.com, or >roger.volgst...@compaq.com (the list administrators). > > --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
