[PCB_FORUM] Re: DGND/AGND merge point
- From: "Budathoki, Trilok (GE Consumer & Industrial)" <trilok.budathoki@xxxxxx>
- To: <icu-pcb-forum@xxxxxxxxxxxxx>
- Date: Thu, 21 Apr 2005 16:23:27 +0530
William
Method vivek mentioned works fine, But it's too long.
Use tie pin or 0 ohm resistor in schematics connect AGND & DGND net to both
side,
Place it at where u want it to short. U'r problem is fixed without any DRC
Thanks
Trilok Budathoki
GE-India Businecc Center
Email: trilok.budathoki@xxxxxx
-----Original Message-----
From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
[mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx]On Behalf Of William Billereau
Sent: Thursday, April 21, 2005 4:02 PM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Re: DGND/AGND merge point
Thanks for this tips, but it is a workaround.
It avoids DRC but not future errors as it is not electrically controlled.
In fact I forgot to tell that we used to do such methods but it can later on a
new revision generate a short-circuit or something like.
So we think it is not secure.. And then we would need something safer, if
possible....
William
----- Original Message -----
From: Vivekananda R K - CTD, Chennai <mailto:vivekanandark@xxxxxxxxxxx>
To: icu-pcb-forum@xxxxxxxxxxxxx
Sent: Thursday, April 21, 2005 12:22 PM
Subject: [PCB_FORUM] Re: DGND/AGND merge point
Hi William,
In allegro menu
1.Setup/Subclass/Board geometry/
Create a layer called "GND_SHORT"
2.Add/line
under Board geometry/Gnd_short layer(Here you need to add a line width of 50
mil with required length where the agnd and dgnd gnds generating point)
3.In the manufacturing /artwork/Film Control
select your gnd layer.art (plane layer)film and add the subclass layer
"gnd_short" under the class board geometry(Set it in the Gerber level)
I hope this may help without generating DRC.
Regards
K.Vivek
Pcb Designer
Hcl Technologies
Chennai.
India.
-----Original Message-----
From: William Billereau [mailto:william.billereau@xxxxxxx]
Sent: Thursday, April 21, 2005 2:03 PM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] DGND/AGND merge point
Hello All.
Quite often, a board contains both AGND and DGND and the customer asks us to
connect them together on a single point on the board, like GND pin of a
connector.
Does anybody know how to do it in Allegro without generating DRCs errors?
Thanks in advance.
William.
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