gEDA-user: Mixed signal plane tie-in

[epswint <epswint@xxxxxxxxxxx>]

First, I'd like to say thanks to all for their input and patience on 
this list - especially towards the new users.  I've moved to PCB since 
it is open and I'm tired of having to leave designs behind because I've 
changed positions and locations and no longer have access to the layout 
package I was working with last.  The user-list has saved me more than 
once from my selective blindness when it comes to reading the 
documentation! 

Now, the question:  I've observed two different techniques for tying 
analog and digital ground planes on mixed-signal boards.  The first 
technique placed the tie-in directly under the analog/digital converter 
on the MCU, the second technique placed the tie-in at the far edge of 
the board between the analog and digital connectors.  Both boards were 
MCU development boards, laid out so that roughly one quadrant of the 
board was analog, the rest digital.  I've got all of my components 
placed and ready to go, just wondering what experience/thoughts the 
user-list had on the subject.

Regards,
Ethan


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