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16.3,Allegro PCB Editor,DRC error

  • Different Force and Sense Line Widths using Pin Pair Physical Constraints

    Hi all, I have been trying to find a method to specify different line widths for the same net. Specifically, I need a force line and sense line to be routed separately to single DuT pin. These lines should be different line widths since the force line carries high current and the sense line doesn't...
    Posted to PCB Design (Forum) by jackg23 on Tue, Feb 1 2011
  • Same net via to via spacing drc suppressed

    In SPB 16.3 hotfix 20 (maybe implemented in 18) Allegro Constraint manager will no longer report a same net via to via spacing drc if those vias are covered (direct connect) by a shape. Cadence says that once the via is covered with a shape the pad ceases to exist and it simply becomes a hole to hole...
    Posted to PCB Design (Forum) by Idaho Tom on Mon, Dec 6 2010
  • PCB autorouter(spectraa) not converging

    Hi, I am making my first pcb with a xilinx fpga device(256 pin BGA package).I am simply connecting the all I/O's to 4 standard 40 pin connectors.Are padstacks necessary for PCB routing??.I have drawn the schematic in Capture imported it to Layout_Plus and autorouted it. But after 3 hours of autorouting...
    Posted to PCB Design (Forum) by bennyn1 on Thu, Sep 2 2010
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