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FAQ about Net resistance in APD+ and Allegro

JuanCR

Here are some frequently asked questions regarding Net Resistance in Allegro PCB Editor and Advanced Package Designer:

  1. What does the net resistance include? 

    Net resistance includes traces, shapes, and ratsnest only. For the complete net with vias and other objects, you need to use SIGRITY tools for elaborate power analysis.

  1. What thickness is used to calculate traces, ratsnest, and shapes?

    The thickness of the layer where they are routed will be used for traces and shapes. For ratsnest, parameters defined in "Unrouted Interconnect Models" will be used.

  1. What trace width is used in the calculation? Does this come from the cross section or from the width that is actually in the design?

    The actual width of the trace will be used.

  1. ​What is the conductivity or resistivity that is used? Is it the conductivity of the material for a given layer?

    Yes, it is the material's conductivity for a given layer in the cross-section.

What other questions do you have about this topic? Leave them in the comments below.

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