[SI-LIST] Re: PCB differential auto-routers
- From: "Haller, Robert" <rhaller@xxxxxxxxxxxxx>
- To: <Cristian_Filip@xxxxxxxxxx>, <zabinski.patrick@xxxxxxxx>, <si-list@xxxxxxxxxxxxx>
- Date: Tue, 8 Jan 2008 11:51:37 -0500
Pat,
I have had some experience routing high speed diff pairs using
Mentor Graphics Expedition and CES. I just finished a backplane with
1000's of connections, tight density and constraints. Depending on your
density, constraints,# of routing layer, etc it may be a challenge with
the auto router. I did find CES to be very valuable if you are using a
Mentor tool flow. If you want details please contact me off list.
Regards,
Bob Haller
Architect
Enterasys Networks =20
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
On Behalf Of Filip, Cristian
Sent: Tuesday, January 08, 2008 10:41 AM
To: zabinski.patrick@xxxxxxxx; si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: PCB differential auto-routers
Hello Pat,
You might want to try Expedition PCB from Mentor Graphics. With CES =3D
(Constraint Editor System) driving the AutoRouter, the power of =3D
AutoRouter can be controlled and harnessed to route high-speed nets. =3D
Critical nets with custom topologies and even differential pairs can be
=3D
auto-routed with ease with the help of CES. CES working with AutoRouter
=3D
can also help the designer to auto-tune the nets for matching lengths =
=3D
and timing analysis.
Here are some links to the Mentor web site on the Expedition Flow:
Overview - http://www.mentor.com/products/pcb/expedition/
Expedition - =3D
http://www.mentor.com/products/pcb/expedition/physical_design/expedition
_=3D
pcb/index.cfm
DxDesigner - =3D
http://www.mentor.com/products/pcb/expedition/system_design/dxdesigner/i
n=3D
dex.cfm
Best regards,
Cristian Filip, B.Eng., CID
Applications Engineer / Ing=3DE9nieur d'applications
=3D20
Mentor Graphics (Canada) Ltd=3D20
505 March Road, Suite 400=3D20
Kanata, ON Canada, K2K 3A4=3D20
Direct: 613-963-1009=3D20
Cell: 514-513-9641=3D20
Fax: 613-963-0878=3D20
Main: 613-963-1000
Email: cristian_filip@xxxxxxxxxx
=3D20
=3D20
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
=3D
On Behalf Of Zabinski, Patrick
Sent: Tuesday, January 08, 2008 10:19 AM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] PCB differential auto-routers
We're finding challenges with some commercial auto-routers when dealing
=3D
with complex boards containing many (100's to 1000's) of differential =
=3D
nets. In particular, a tool that obeys our SI-related constraints, such
=3D
as pair-to-pair pitch, space to ground voids, etc.
Anyone have a tool they'd recommend for auto-routing large PCBs that =3D
contain many differential nets?
Thanks,
Pat Zabinski
Mayo Clinic
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