Cross Talk
For this board's stackup and considering 1ns rising edge, we
have -21.02 dB calculated cross talk coefficient on micro strip traces
running 10 mils apart for 4 inches and -18.81 dB on stripline traces.
We performed cross talk tests for some nets on the board,
using the Interconnect Synthesis tool by Mentor Graphics.
Most of the IBIS models were vendor supplied.
The IBIS models for Altera 20K400 were generated with Quartus II.
Some examples:
/VMEDATA(8) is a 27.8" long net with 14 potential aggressor nets
(as reported by ICX):
Cross talk induced signals measured on 4 pins on /VMEDATA(8),
Signals
on 4 pins of /VMEDATA(8) with no cross talk,
Signals
on the same 4 pins of /VMEDATA(8) considering the effect of cross
talk.
Overlay
of same pin signals with and without cross talk effect.
Example of lvds signals
measured on the termination resistor and differentially on the receiver;
Overlay of that differential
signal with and without cross talk.
Cross
talk on LOGIC1_L1_IN_DS_0
Cross
talk on LOGIC1_L1_IN_DS_1
Cross talk
on LOGIC1_CDFCLK
Cross talk
on CDFclkBUS0_0
Cross talk
on CDFclkBUS1_0
-
For questions regarding this page contact Mircea Bogdan.
bogdan@frodo.uchicago.edu
Revised:8/12/02.