[PCB_FORUM] Re: Xnets on a diff pair choke
- From: Tim Woytek <tim.woytek@xxxxxxxxxxxxxx>
- To: "icu-pcb-forum@xxxxxxxxxxxxx" <icu-pcb-forum@xxxxxxxxxxxxx>
- Date: Tue, 12 Nov 2013 15:23:37 +0000
Here is some additional info.
[cid:image003.jpg@01CEDF88.DD2A5B50]
Regards,
Tim Woytek
Senior PCB Designer
Freedom CAD Services, Inc.
Office: 214.495.0296
Cell: 469.667.1377
Skype: tim_at_fcs
Email: tim.woytek@xxxxxxxxxxxxxx
visit us at http://www.freedomcad.com
From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
[mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Jean Bratton
Sent: Tuesday, November 12, 2013 8:59 AM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Re: Xnets on a diff pair choke
I did something similar a long time ago, here's the email thread, perhaps
something similar would work if you don't get a better answer...
Jean Bratton
Senior PCB Designer
Freedom CAD Services, Inc.
Phone: 603-864-1349
Skype: jean.bratton
Email: jean.bratton@xxxxxxxxxxxxxx<mailto:jean.bratton@xxxxxxxxxxxxxx>
Visit us at http://www.freedomcad.com<http://www.freedomcad.com/>
Probably, unless it changes at the schematic level.
From: Gerry Meier
Sent: Wednesday, September 21, 2011 5:57 PM
To: Ray Dionne; Jean Bratton; Designers
Subject: RE: Xnets through SOT's
This is concept so will it change back with next netlist?
Gerry Meier, Sr. PCB Designer
Freedom CAD Services. Inc
Voice: (256) 715-1424 or (603) 864-1350
Email:gerry.meier@xxxxxxxxxxxxxx
Skype: rgmeier3
visit us at http://www.freedomcad.com
P Think Green only print as needed.
From: Ray Dionne
Sent: Wednesday, September 21, 2011 4:55 PM
To: Jean Bratton; Gerry Meier; Designers
Subject: RE: Xnets through SOT's
You can change the pinuse with edit property > pin
From: Jean Bratton
Sent: Wednesday, September 21, 2011 4:56 PM
To: Gerry Meier; Designers
Subject: RE: Xnets through SOT's
Way to go Gerry... it worked... sort of.
The part is a 5 pin part, pins 1 & 2 are connected together, 3 is ground, 4 is
the other side of the "resistor" and 5 is power. I set up the "resistor" to be
between pins 2 & 4 and now I have an xnet which encompasses all of the
highlighted nets below.
The catch is I get an error going into SigXP saying that all discrete pins
should have "UNSPEC" as the pin use and that pin 1 has "IN" but I'm not sure
how to change that. I tried ignoring the error and it lets me set up the
relative prop delay rule, but when I try to update CM it won't map.
I'd play more with this but the requirement is likely to be going away on this
board. Though any thoughts would be appreciated... if we can figure it out we
can document it for future use:)
[cid:image001.png@01CC788A.830C40A0]
[cid:image002.png@01CC788A.830C40A0]
Jean Bratton
Senior PCB Designer
Freedom CAD Services, Inc.
Phone: 603-864-1349
Skype: jean.bratton
Email: jean.bratton@xxxxxxxxxxxxxx<mailto:jean.bratton@xxxxxxxxxxxxxx>
Visit us at http://www.freedomcad.com
From: Gerry Meier
Sent: Tuesday, September 20, 2011 11:07 AM
To: Jean Bratton; Designers
Subject: RE: Xnets through SOT's
Jean,
OTH - I can only think of one way. Maybe if it is possible to make the sot
look like a r-pack?
Gerry Meier, Sr. PCB Designer
Freedom CAD Services. Inc
Voice: (256) 715-1424 or (603) 864-1350
Email:gerry.meier@xxxxxxxxxxxxxx
Skype: rgmeier3
visit us at http://www.freedomcad.com
P Think Green only print as needed.
From: Jean Bratton
Sent: Tuesday, September 20, 2011 8:57 AM
To: Designers
Subject: Xnets through SOT's
Hi all,
I know this wasn't possible in the past, and just want to be sure I didn't miss
something in the newer software releases... I have what is essentiall an Xnet
going through an 5 pin SOT23 part and I'd like to put the overall length
through this part into a match group. I know how to work around the fact that I
cannot make it a true Xnet, but please confirm I'm correct in that I cannot
make it so.
Thanks (ever the wishful thinker... :))
Jean Bratton
Senior PCB Designer
Freedom CAD Services, Inc.
Phone: 603-864-1349
Skype: jean.bratton
Email: jean.bratton@xxxxxxxxxxxxxx<mailto:jean.bratton@xxxxxxxxxxxxxx>
Visit us at http://www.freedomcad.com
From:
icu-pcb-forum-bounce@xxxxxxxxxxxxx<mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx>
[mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Macindoe, Gary
Sent: Tuesday, November 12, 2013 9:38 AM
To: icu-pcb-forum@xxxxxxxxxxxxx<mailto:icu-pcb-forum@xxxxxxxxxxxxx>
Subject: [PCB_FORUM] Xnets on a diff pair choke
Hi guys,
Anyone know how to get a four pin choke (series on a diff pair) to have an xnet
assigned? We have seven diff pairs that have a length matching requirement, one
of them with a series choke.
Thanks for any help.
Regards,
Gary MacIndoe
Senior PCB Design Engineer
EbD R&D Hardware
Surgical Solutions Group
Covidien
Boulder, CO
www.covidien.com<http://www.covidien.com/>
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