[PSES] SV: [PSES] Stripline - discontinuity in adjacent ground planes

2020-03-19 Thread Amund Westin
. Fra: Gert Gremmen Sendt: 18. mars 2020 09:52 Til: Amund Westin ; EMC-PSTC@LISTSERV.IEEE.ORG Emne: Re: [PSES] Stripline - discontinuity in adjacent ground planes Any signal flowing in the SIGNAL layer, will when getting to the load have to choose between 2 ground layers. (when

[PSES] SV: [PSES] Stripline - discontinuity in adjacent ground planes

2020-03-19 Thread Amund Westin
signal /crtl. lines Regards Amund Fra: James Pawson (U3C) Sendt: 18. mars 2020 09:51 Til: 'Amund Westin' ; EMC-PSTC@LISTSERV.IEEE.ORG Emne: RE: [PSES] Stripline - discontinuity in adjacent ground planes Hi Amund, Are the distances from GND1-Signal the same as Signal-GND2 i.e

Re: [PSES] Stripline - discontinuity in adjacent ground planes

2020-03-18 Thread Gert Gremmen
Any signal flowing in the SIGNAL layer, will when getting to the load have to choose between 2 ground layers. (when ordinary vias are used) The signal layer with the lowest impedance is that where a good mutual coupling between SIGNAL current and GNDX is assured al along. So just verify the

Re: [PSES] Stripline - discontinuity in adjacent ground planes

2020-03-18 Thread James Pawson (U3C)
& Vibration <http://www.unit3compliance.co.uk/> www.unit3compliance.co.uk 07811 139957 2 Wellington Business Park, New Lane, Bradford, BD4 8AL From: Amund Westin Sent: 18 March 2020 08:38 To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] Stripline - discontinuity in adjacent gro

[PSES] Stripline - discontinuity in adjacent ground planes

2020-03-18 Thread Amund Westin
Let's say, part of a pcb stack looks like this --- GND1 - SIGNAL - GND2 GND1 is solid copper fill SIGNAL layer consists of high frequency lines LVDS, USB3.0, etc. GND2 should be solid copper fill, but some traces are in that layer due to space utilization reason. These traces are crossing