Form: Reply Text: (1 line follows) I am on Vacation until Wed the 4th. Original text: (37 lines follow) >From [log in to unmask], on 8/28/96 3:27 PM: Nice article doug brooks. We need more studies such as that one. However, may I suggest that this may also have something to do with the circuits within ICs. A signal on a pcb will experience some coupling with the nearest plane, and the transistor circuit within an IC may be referenced to one plane or the other. Some IC logic families reference ground in their transistor circuits, and some reference vcc, and some both. It may be possible if there is coupling between a signal and a plane, a device might not perform properly do to the transistor circuit looking at the wrong plane. There may be some cases where something outside the transmission line may have an issue with the plane our signal is closest to. Evan though signal coupling to different planes may be an issue, I have not seen this problem personally. This may be something not to worry about unless the engineer expresses some interest in routing the signals next to a certain plane. joez CAD Engineer [log in to unmask] **************************************************************************** * The mail list is provided as a service by IPC using SmartList v3.05 * **************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * **************************************************************************** Use Proportional Font: true Previous From: [log in to unmask] Previous To: Tom [log in to unmask] Original to: Tom [log in to unmask] >From MailMinder: true >From Agent: true Attachment Count: 0 --$----Novell--Attachment----$ X-NVL-Content-Type: UNKNOWN X-NVL-Content-Typename: UNKNOWN X-NVL-Content-Charset: X-IBM-437 X-NVL-Content-Filename: ATTRIBS.BND X-NVL-Content-Transfer-Encoding: X-UUENCODE begin 777 ATTRIBS.BND M0F5Y;VYD(%!A8VME9"!!='1R:6)U=&5S`)+]"'<H"@``````0F5Y;VYD(%!R M;W!R:65T87)Y($1A=&$:`````!$```````0`#0#N`0`````````````````` M````````3W)I9VEN86P@=&5X=``&1@H`````````````W`$#```&U@$"``(` M```D``(``0`!`#H``````````@`[`,8%````````./\```````"0`0`````` M````35,@4V%N<R!397)[log in to unmask]\````` M``"0`0``````````0V]U<FEE<@`````````````````````````````````` M`````0`!`#L``@`[`/=_`@`\`/=_`@`]`/=_`@`^`/=_`@"!`/=_`@""`/=_ M`@"_`/=_`@#Y`/=_`@`S`?=_`@!M`?=_`@"J`?=_`@#O`?=_`@`M`O=_`@!O M`O=_`@"3`O=_`@"4`O=_`@#5`O=_`@`5`_=_`@`6`_=_`@!9`_=_`@";`_=_ M`@#:`_=_`@`)!/=_`@`*!/=_`@`1!/=_`@`6!/=_`@`C!/=_`@`Q!/=_`@`R M!/=_`@!_!/=_`@#,!/=_`@`:!?=_`@!G!?=_`@"T!?=_`@`!!O=_```````` M````````9``!I`$!2`,![`0!D`8!-`@!V`D!?`L!(`T!Q`X!:!`!#!(!L!,! M5!4!^!8```````````````!D``'@`0'``P&@!0&`!P%@"0%`"P$@#0$`#P'@ 2$`'`$@&@%`&`%@%@&`%`&@`` ` end --$----Novell--Attachment----$-- **************************************************************************** * The mail list is provided as a service by IPC using SmartList v3.05 * **************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * ****************************************************************************