[SI-LIST] Re: Hyperlynx far end crosstalk simulation issue
- From: steve weir <weirsi@xxxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Fri, 20 Mar 2015 04:34:03 -0700
Zero FEXT does not mean zero NEXT or zero noise coupling.
Steve.
On 3/20/2015 2:55 AM, 163 wrote:
> Sorry for the messy code. Have no idea what happened. Resent this email...
>
> Hi experts,
>
> It's known that compared with microstrip, an added benefit of stripline
> routing is zero far-end crosstalk (FEXT) because of a uniform Er surrounding
> the signal traces. However, the Hyperlynx simulation results tell me
> otherwise.
>
> I use Hyperlynx to simulate 5 stripline parallel signals (4 aggrs +1 victim)
> using point to point topology. The aggressor drivers are toggling
> simultaneously (all in phase) and the victim driver is stuck at high (let's
> say 1.2V).
>
> Theoretically the victim receiver should also stuck at high at 1.2V. However
> the Hyperlynx simulation results show that there is noise coupled to the
> victim receiver and the noise is related to the distance to the adjacent
> signals. Is my simulation wrong?
>
> Thanks and regards,
> Amanda
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