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  • 4 Layer PCB First Time

    Hi Guys, I am new to both OrCAD/Allegro and 4 Layer PCB's. I'm having a tough time using the Spectra auto router to properly place via's in my design. Do I need to make and specify special via's when creating a multilayer board. I looked in costraint manager, and the default via doesnt...
    Posted to PCB Design (Forum) by zquinn3 on Tue, Aug 26 2014
  • IC6.1.6 Virtuoso Space-Based Mixed-Signal Router (VSR)

    Virtuoso Space-Based Router (VSR) is routing solution integrated into the Virtuoso Layout Suite, which provides a comprehensive set of routing features for a variety of layout tasks. One major design task for layout designs is chip/block assembly routing in mixed-signal analog top (AoT) designs. What's...
    Posted to Mixed-Signal Design (Weblog) by AndreasLenz on Tue, Oct 29 2013
  • VCAR OA Filter VIA Layers Issue

    I am trying to filter out all VIA layers while exporting the layout to VCAR to cut down the size of the database in Open Access. In CDB the all via defined were shown after export (recognized) but in OA only customVia Definitions are exported but not the standard via defintions. Since the datase size...
    Posted to Custom IC Design (Forum) by VenuA on Wed, Aug 29 2012
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