Re: [SI-LIST] : Testing board stackup

About this list Date view Thread view Subject view Author view

From: Yu Wang ([email protected])
Date: Thu May 10 2001 - 09:15:23 PDT

Diego,
Without adding an extra layer,I would use the below
stackup better.
Here is my 2 cents.

      analog signal
      digital ground
      digital signal (fast digi signals)
      digital ground
      digital signal (slow digi signals)

Yu

--- [email protected] wrote:
>
> Hi all,
>
> I have the following stackup in a testing board
> form mixed-signal
> devices:
>
> digital signal
> digital ground
> analog signal
> digital ground
> digital signal
>
> The digital signals have a risetime of 500ps.
> The analog signals are
> slow, nearly DC, but of little amplitude. When
> digital signals are
> switching, I have some noise induced in the
> analog traces. I suspect
> this is due to induced magnetic fields into
> analog traces.
> Is it due to wrong layer stackup ? If yes, how
> can I improve it ?
>
> Thank you for everything
>
> Diego Koch
>
>
> **** To unsubscribe from si-list or si-list-digest:
> send e-mail to
> [email protected]. In the BODY of message
> put: UNSUBSCRIBE
> si-list or UNSUBSCRIBE si-list-digest, for more
> help, put HELP.
> si-list archives are accessible at
> http://www.qsl.net/wb6tpu
> ****
>

=====

__________________________________________________
Do You Yahoo!?
Yahoo! Auctions - buy the things you want at great prices
http://auctions.yahoo.com/

**** To unsubscribe from si-list or si-list-digest: send e-mail to
[email protected]. In the BODY of message put: UNSUBSCRIBE
si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP.
si-list archives are accessible at http://www.qsl.net/wb6tpu
****

About this list Date view Thread view Subject view Author view

This archive was generated by hypermail 2b29 : Thu Jun 21 2001 - 10:11:53 PDT