Power Rails

Define the power rail library for power integrity analysis.

1. Click Properties > Power Rails.
   The Power Rail dialog opens.
2. Click the power signal name to show its properties.
   The Power Rail Properties dialog opens.

   • DC Current Sink: Define the DC current and the allowable DC voltage drop.
   • Target Impedance: Specify the target impedance by frequency.
     • Add: Add a new target impedance.
     • Remove: Remove the selected target impedance.
     • Import (Excel): Import target impedance from MS Excel.
     • Export (Excel): Export current target impedance to MS Excel.

       
       
       Figure 1.

   • Package PDS Model: Define the power distribution system (PDS) model type and model library file.
     • Model Type: Select the package PDS model type. SPICE, S-parameter, Y-parameter, and Z-parameter models are available.
     • Model File: Select the model file.