Hi,
Since crosstalk is such an important topic in field of signal integrity,
numerous tools and methodologies have
been developed for analysis of crosstalk effects.
For instance, there exist rules of thumb, mathematical equations and
calculators for obtaining a first order
estimate of crosstalk noise.
There are also tools such as HSPICE, Ansys/Ansoft Designer, HyperLynx,
MATLAB/Simulink, etc., which allow
a more accurate simulation of FEXT and NEXT, both in time and frequency
domains.
A crosstalk simulation of a topology consisting of an aggressor line and a
victim, usually requires terminating
both ends of the victim line.
Furthermore, in order to ensure validity of the simulation setup and
results, it is recommended that:
I. Vary the coupling length. As the coupled length is increased, crosstalk
noise should also increase.
ii. Vary separation between the aggressor and victim lines. As separation
is increased crosstalk noise should
diminish (and vice versa).
iii. Evaluate effectiveness of trace terminations.
Frequently, the ultimate test for assessing the accuracy of a simulation
outcome is to correlate it with measurement
results. A discrepancy between simulated and measured data usually
indicates that an improvement is required
in the modeling or simulation setup (assuming that the measurement result
is reliable/accurate).
Kind regards,
Abe
On Sun, Jun 18, 2017 at 1:45 AM, Hermann Ruckerbauer <
Hermann.Ruckerbauer@xxxxxxxxxxxxx> wrote:
Hello,
I guess there is no need for expensive Tools, I guess QUCS should do the
job, and most likely LTspice as well.
Please correct me if I'm wrong in the assumption that these tools can
handle the job.
I would also assume, that you can check FEXT/NEXT with imperfect
termination e. g. on the Victim line where you would see reflected
crosstalk waves.
Hermann
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Am 16.06.2017 um 02:33 schrieb Aakash Gupta:
Hello Experts,to
I am studying cross talk and I see many resources online showing the
profile of NEXT and FEXT for a step signal (rising edge only). I totally
get that.
I want to know what is the cross talk profile for a pulse (rising and
falling edge). I have some picture in my mind but I cannot afford tools
simulate and verify my intuition.
If some has them simulated or could explain me. It will be very helpful.
Thanks
Aakash.
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