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Measuring PDN Loop Inductance

SimTech

Any PCB will have a complex geometry due to the arrangement of components, traces, vias, pads, planes, and much more. The PDN in a PCB can be quite complex due to the use of multiple plane layers, power rails, vias leading to components, and decoupling capacitors used throughout. Each of these elements contributes some PDN loop inductance to the total impedance of the structure, and it’s important to see how inductance plays a role in determining total impedance as part of power integrity design.

Unfortunately, there is no single formula for determining PDN loop inductance or impedance. Instead of using simple formulas to determine the inductance and impedance in a PDN, measurements and field solvers can be used to determine these values and better understand transient behavior on the PDN. Once these are determined, designers can take a transfer function approach to understand the PDN impedance and predict how different components will create ripple noise .

Click here to learn more about measuring PDN Loop Inductance and how it impacts overall impedance

  • Filo221

    Is PowerSI Ttool   to able to analize PDN? 

  • jillashiva
    in reply to Filo221

    Yes, Power SI have the capabilities to extract the PDN network , you can view S/Y/Z parameters to Analyze the same.

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