[SI-LIST] Re: Need technical ammunition for switching to single ground plane !

Hi Gilles,

The best article that I have seen on this subject is by Henry Ott,
"Partitioning and Layout of a Mixed-Signal PCB". Another informative
slideshow type PDF is from Tim Williams entitled "Advanced Topics in
EMC Design", and is available on his Elmac Services website. 

www.hottconsultants.com/pdf_files/june2001pcd_mixedsignal.pdf
www.elmac.co.uk/pdfs/Advanced_Topics_in_EMC_Design.pdf

 
Good luck.

PC




--- In si-list@xxxxxxxxxxxxxxx, "Gilles Aminot" <gilles.aminot@...> wrote:
>
> Hi Everyone,
>  
> I'm working on a new design and would like to eliminate split ground
> planes. In the past we've always split the analog ground plane (for
> analog audio circuits and codecs) and joined it at one location
> (sometimes shorting or through an inductor). I've read lot's of postings
> on this group explaining good reasons not to split ground planes, but
> the only real supporting documentation I have seen is the following
> article: 
> http://www.analog.com/analog_root/static/pdf/raq/RAQ_groundingADCs.pdf
> <http://www.analog.com/analog_root/static/pdf/raq/RAQ_groundingADCs.pdf>
> and it does not provide much depth..
>  
> I have been meeting some resistance to eliminating the split ground
> planes and I am looking for technical articles showing the advantages of
> using a single ground plane in designs with mixed high speed digital and
> sensitve analog circuits. I keep bumping my head against datasheets or
> articles that say analog & digital grounds should be separated (such as:
> http://www.ultracad.com/articles/planesplits.pdf), which makes it
> difficult to convince my peers that changing our approach is the way to
> go. Can anyone share or point me to articles which may help me plead my
> case. I would also appreciate if anyone could share some real life
> experiences of going from split to single ground plane.
>  
> Kindest Regards,
> Gilles Aminot, P.Eng
> Hardware Design Engineer
>  
> Librestream Technologies Inc
> Unit 200 - 55 Rothwell Rd
> Winnipeg MB. Canada
> R3P-2M5
> PH: 204-487-0612 Ext 218
> FX: 204-487-0914
>  
>  

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