Roflin/rebbarb
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

PCB: insert MDI dampers R32-R35 in-line and place C20/C21 at J2 center taps

Browse Source 
Insertion by Dennis; reviewed:
- DRC 0 errors / 0 unconnected / 0 schematic parity
- R32-R35 sit in-line between the termination cluster and D4/D5, each
  aligned to its own line row; MDI_* stubs only 1.45-1.48mm, no new
  vias, all pair copper at the ETH_DP 0.2mm width
- Pair skew after insertion: TX 0.66mm, RX 1.81mm - both far inside
  the 100BASE-TX budget
- C20/C21 placed against J2's pin column, about as close as the In1
  plane void allows while keeping short GND vias

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Dennis Brentjes
2026-07-18 14:10:23 +00:00
parent ad37ebda87
commit 3905319aea
3 changed files with 2889 additions and 1607 deletions
Download Patch File Download Diff File Expand all files Collapse all files
hardware/re-bba-rb/ethernet.kicad_sch
+1108 -1130
View File
File diff suppressed because it is too large Load Diff
hardware/re-bba-rb/re-bba-rb.kicad_pcb
+1781 -461
View File
File diff suppressed because it is too large Load Diff
hardware/re-bba-rb/re-bba-rb.kicad_pro
-16
View File
@@ -664,22 +664,6 @@
"netclass": "ETH_DP", "netclass": "ETH_DP",
"pattern": "*ETH_RX_N*" "pattern": "*ETH_RX_N*"
}, },
{
"netclass": "ETH_DP",
"pattern": "*MDI_TX_P*"
},
{
"netclass": "ETH_DP",
"pattern": "*MDI_TX_N*"
},
{
"netclass": "ETH_DP",
"pattern": "*MDI_RX_P*"
},
{
"netclass": "ETH_DP",
"pattern": "*MDI_RX_N*"
},
{ {
"netclass": "ETH_DP", "netclass": "ETH_DP",
"pattern": "*PHY_TX_P*" "pattern": "*PHY_TX_P*"