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via

  • Forcing via connections
    I have a multi-layer design with multiple ground plane layers. But these have issues with ground loops. How can I set something in PCB Editor 16.5 that will only connect vias to one ground plane layer and leave all other layers unconnected, so that I can use a single ground connection point.
    Posted to PCB Design (Forum) by tmd63 on Fri, May 3 2013

  • How do I create a stack of vias
    We sometimes need to define a thruhole via as a stack up of blind microvias and buried vias. This is becasue on th eTop and Bottom layers I need a smaller pad, that cannot be acieved with thruhole via, but only with blind micorvias. Is it possible in PCB Editor to define such a via, or at least to place...
    Posted to PCB Design (Forum) by Leticia on Fri, Apr 5 2013

  • How to assign/update an etch objects' net
    Unaware I was in the wrong forum, I've been posting this PCB layout question in the Digital Implementation forum http://www.cadence.com/Community/forums/p/23378/1322026.aspx#1322026 I am trying to take a group of pre-selected vias and change the net that they are on. My inquiry is as follows: Apparently...
    Posted to PCB Design (Forum) by RaylonS on Thu, Mar 28 2013

  • What's Good About PCB SI and Vias? 16.6 Has Many New Enhancements!
    In the Allegro PCB SI 16.6 release, vias in SigXp have been enhanced to make it more efficient for design use. In addition, Allegro PCB Editor padstacks will be used to build the models. Read on for more details … Adding Vias Adding a via is easier and faster than before. You no longer have to...
    Posted to PCB Design (Weblog) by Jerry GenPart on Mon, Mar 25 2013

  • update "cutSpacing" of a via
    Hi guys, Long time lurker, first time poster. I first want to thank Andrew, Lawrence and other regulars for contributing to this forum. I have a simple problem that I can't seem to figure out and I am hoping you guys can point me to the right direction. I am trying to update the "cutSpacing"...
    Posted to Custom IC SKILL (Forum) by chianga on Tue, Dec 18 2012

  • What's Good About APD’s Shape Shorting? You’ll Need the 16.6 Release to See!
    In some designsflows, you need to connect two plane shapes on the same net, but on different layers, together with vias in order to improve connectivity. These “shorting” vias are placed in a regular pattern across the overlapping areas of the shape, in such a way as not to interfere with...
    Posted to PCB Design (Weblog) by Jerry GenPart on Tue, Nov 13 2012

  • What is the best way to create a GSSG differential via structure?
    I would like to use GSSG differential via structure for the 10G Serdes signal routing. What is the best way to implement GSSG differential via structure? How to make a oblong shape Anti pad for the two differential vias? Look forward to your help. Thanks.
    Posted to PCB Design (Forum) by Xu Zhou on Thu, Oct 25 2012

  • How to assign VIA to a net name?
    Hello, I'm having problems with adding/naming Vias. I select the "Add via", then "by geometry", specify it's geometry and put (click) it over an existing net. The problem however is, that the Via isn't connected to the net. The attribute window says it's net is _NULL...
    Posted to Digital Implementation (Forum) by mizzihood on Fri, Aug 17 2012

  • Error: Padstacks missing thermal/antipad definitions?
    Hey everyone, Background: I am new to Cadence, and am going through a simple tutorial on how to create a 555 LED blinker circuit using the Cadence suite. Following the tutorial, I drew the schematic in OrCAD, created a few custom pads and footprints, placed the components in Allegro, and autorouted the...
    Posted to PCB Design (Forum) by bnaden on Thu, Jun 7 2012

  • Q&A: GSA Working Group Tackles Barriers to 3D-IC Adoption
    The Global Semiconductor Alliance ( GSA ) 3D IC Working Group is helping pave the way to mainstream adoption of 3D-ICs. With around 275 members, this group provides a neutral forum in which representatives of EDA vendors, design services houses, foundries, outsourced assembly and test (OSAT) providers...
    Posted to Industry Insights (Weblog) by rgoering on Mon, May 21 2012
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