[PCB_FORUM] Re: Shorting two or more nets together

  • From: Oscar Migs <o.miguelino@xxxxxxxxx>
  • To: icu-pcb-forum@xxxxxxxxxxxxx
  • Date: Tue, 10 Jan 2012 19:19:59 -0800

NET_SHORT property can only be applied to a pin, a shape, or a via.  So to
work around the DRC issue I change the cline to a shape.  Net shorts are
typically used on power and ground nets so converting them to shapes is a
non issue.  If you need it to remain as a cline, then create an extended
shape then tie a cline to it.

Best regards,

-oscar

>  ** **
>
> *From:* icu-pcb-forum-bounce@xxxxxxxxxxxxx [mailto:
> icu-pcb-forum-bounce@xxxxxxxxxxxxx] *On Behalf Of *Gerry Meier
> *Sent:* Tuesday, January 10, 2012 8:40 AM
>
> *To:* icu-pcb-forum@xxxxxxxxxxxxx
> *Subject:* [PCB_FORUM] Re: Shorting two or more nets together****
>
>  ** **
>
> I would probably “Waive it” with a detailed description. I prefer that
> over the No_DRC  because the visual DRC can be turned on or off and a
> report can be generated.****
>
> ** **
>
> Gerry.****
>
> ** **
>
> Gerry Meier, Sr. PCB Designer****
>
> Freedom CAD Services. Inc****
>
> Voice: (256) 715-1424 ****
>
> Email:gerry.meier@xxxxxxxxxxxxxx****
>
> Skype: rgmeier3****
>
> visit us at http://www.freedomcad.com****
>
>  *P** ** Think Green only print as needed*. ****
>
> ** **
>
> *From:* icu-pcb-forum-bounce@xxxxxxxxxxxxx
> [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] *On Behalf Of *Macindoe, Gary
> *Sent:* Tuesday, January 10, 2012 10:33 AM
> *To:* icu-pcb-forum@xxxxxxxxxxxxx
> *Subject:* [PCB_FORUM] Re: Shorting two or more nets together****
>
> ** **
>
> Actually, I meant in the App Note example (via of one net inside the pad
> of another).****
>
> ** **
>
> Regards,****
>
> * *
>
> *Gary MacIndoe*
>
> Senior PCB Design Engineer****
>
> EbD R&D Hardware****
>
> Surgical Solutions Group****
>
> Covidien****
>
> 5920 Longbow Drive****
>
> Boulder, CO 80301****
>
> ** **
>
> 303.476.7458****
>
> www.covidien.com****
>
> ** **
>
> *From:* icu-pcb-forum-bounce@xxxxxxxxxxxxx
> [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] *On Behalf Of *Gerry Meier
> *Sent:* Tuesday, January 10, 2012 9:29 AM
> *To:* icu-pcb-forum@xxxxxxxxxxxxx
> *Subject:* [PCB_FORUM] Re: Shorting two or more nets together****
>
> ** **
>
> I think if you pull the shape back so it does not include the origin of
> the pin you are shorting to you will not get that error. ****
>
> ** **
>
> Gerry Meier, Sr. PCB Designer****
>
> Freedom CAD Services. Inc****
>
> Voice: (256) 715-1424 ****
>
> Email:gerry.meier@xxxxxxxxxxxxxx****
>
> Skype: rgmeier3****
>
> visit us at http://www.freedomcad.com****
>
>  *P** ** Think Green only print as needed*. ****
>
> ** **
>
> *From:* icu-pcb-forum-bounce@xxxxxxxxxxxxx
> [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] *On Behalf Of *Macindoe, Gary
> *Sent:* Tuesday, January 10, 2012 10:25 AM
> *To:* icu-pcb-forum@xxxxxxxxxxxxx
> *Subject:* [PCB_FORUM] Re: Shorting two or more nets together****
>
> ** **
>
> Fair enough, but how would you get rid of the DRC in that example?****
>
> ** **
>
> Regards,****
>
> * *
>
> *Gary MacIndoe*
>
> Senior PCB Design Engineer****
>
> EbD R&D Hardware****
>
> Surgical Solutions Group****
>
> Covidien****
>
> 5920 Longbow Drive****
>
> Boulder, CO 80301****
>
> ** **
>
> 303.476.7458****
>
> www.covidien.com****
>
> ** **
>
> *From:* icu-pcb-forum-bounce@xxxxxxxxxxxxx
> [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] *On Behalf Of *Gerry Meier
> *Sent:* Tuesday, January 10, 2012 9:12 AM
> *To:* icu-pcb-forum@xxxxxxxxxxxxx
> *Subject:* [PCB_FORUM] Re: Shorting two or more nets together****
>
> ** **
>
> True – but anything could short to that pin and “Not be Reported”. I am
> not the only one who works on my boards so I tend to constrain so it cannot
> be wrong by lack of knowledge.****
>
> Hope that was politically correct.****
>
> ** **
>
> Gerry Meier, Sr. PCB Designer****
>
> Freedom CAD Services. Inc****
>
> Voice: (256) 715-1424 ****
>
> Email:gerry.meier@xxxxxxxxxxxxxx****
>
> Skype: rgmeier3****
>
> visit us at http://www.freedomcad.com****
>
>  *P** ** Think Green only print as needed*. ****
>
> ** **
>
> *From:* icu-pcb-forum-bounce@xxxxxxxxxxxxx
> [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] *On Behalf Of *Macindoe, Gary
> *Sent:* Tuesday, January 10, 2012 10:06 AM
> *To:* icu-pcb-forum@xxxxxxxxxxxxx
> *Subject:* [PCB_FORUM] Re: Shorting two or more nets together****
>
> ** **
>
> Not in the example I gave, it only allows the DRC for that pin, not the
> whole net.****
>
> ** **
>
> Regards,****
>
> * *
>
> *Gary MacIndoe*
>
> Senior PCB Design Engineer****
>
> EbD R&D Hardware****
>
> Surgical Solutions Group****
>
> Covidien****
>
> 5920 Longbow Drive****
>
> Boulder, CO 80301****
>
> ** **
>
> 303.476.7458****
>
> www.covidien.com****
>
> ** **
>
> *From:* icu-pcb-forum-bounce@xxxxxxxxxxxxx
> [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] *On Behalf Of *TEYSSIER
> Jean-Charles
> *Sent:* Tuesday, January 10, 2012 8:55 AM
> *To:* icu-pcb-forum@xxxxxxxxxxxxx
> *Subject:* [PCB_FORUM] Re: Shorting two or more nets together****
>
> ** **
>
> Ouch……. Verry dangerous.****
>
> ** **
>
> It is kind of property i avoid to use (it allow ALL drc’s with all nets)**
> **
>
> ** **
>
> *Jean-Charles TEYSSIER *****
>
> *Responsable d’affaire*****
>
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>    ------------------------------
>
> *De :* icu-pcb-forum-bounce@xxxxxxxxxxxxx
> [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] *De la part de* Macindoe, Gary
> *Envoyé :* mardi 10 janvier 2012 16:50
> *À :* icu-pcb-forum@xxxxxxxxxxxxx
> *Objet :* [PCB_FORUM] Re: Shorting two or more nets together****
>
> ** **
>
> My guess is that you could put a “No_Drc” property on the pin.****
>
> ** **
>
> Regards,****
>
> * *
>
> *Gary MacIndoe*
>
> Senior PCB Design Engineer****
>
> EbD R&D Hardware****
>
> Surgical Solutions Group****
>
> Covidien****
>
> 5920 Longbow Drive****
>
> Boulder, CO 80301****
>
> ** **
>
> 303.476.7458****
>
> www.covidien.com****
>
> ** **
>
> *From:* icu-pcb-forum-bounce@xxxxxxxxxxxxx
> [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] *On Behalf Of *Carrow, Dennis
> *Sent:* Tuesday, January 10, 2012 8:38 AM
> *To:* 'icu-pcb-forum@xxxxxxxxxxxxx'
> *Subject:* [PCB_FORUM] Re: Shorting two or more nets together****
>
> ** **
>
> So I follow the doc when building by symbol but I have pad to pad errors
> because I have via pads inside of a larger pad.  I see on figure 3 of the
> ap note they have pad to pad errors also.   So do I leave these errors or
> am I missing a step?  Thanks! -DC****
>
> ** **
>
> *From:* icu-pcb-forum-bounce@xxxxxxxxxxxxx
> [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] *On Behalf Of *Gerry Meier
> *Sent:* Monday, January 09, 2012 4:30 PM
> *To:* icu-pcb-forum@xxxxxxxxxxxxx
> *Subject:* [PCB_FORUM] Re: Shorting two or more nets together****
>
> ** **
>
> Try this****
>
> ** **
>
> Gerry Meier, Sr. PCB Designer****
>
> Freedom CAD Services. Inc****
>
> Voice: (256) 715-1424 ****
>
> Email:gerry.meier@xxxxxxxxxxxxxx****
>
> Skype: rgmeier3****
>
> visit us at http://www.freedomcad.com****
>
>  *P** ** Think Green only print as needed*. ****
>
> ** **
>
> *From:* icu-pcb-forum-bounce@xxxxxxxxxxxxx
> [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] *On Behalf Of *Carrow, Dennis
> *Sent:* Monday, January 09, 2012 4:27 PM
> *To:* 'icu-pcb-forum@xxxxxxxxxxxxx'
> *Subject:* [PCB_FORUM] Shorting two or more nets together****
>
> ** **
>
> Hi Everyone,****
>
>                 Can I ask how to properly short two or more grounds at a
> common point using Cadence Allegro 16.X and Design Entry HDL?  Thanks for
> any and all ideas! DC****
>

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