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The power distribution network (PDN) is the path from the power supply source (VRM) to the ICs (active devices). At low impedance, the PDN delivers adequate current to the receiver, enabling the PCB to function as desired.
Without a low-impedance path across the PDN, noise can propagate throughout a PCB, causing bit errors, voltage ripples, timing violations, and more. This white paper by Fadi Deek of Mentor, a Siemens Business, examines how impedance can be controlled in the PDN cavity.
To download this free white paper, click here.
Yuriy Shlepnev, Simberian
A typical PCB design usually starts with the material selection and stackup definition—the stackup planning or design exploration stage. How reliable are the data provided by the material vendors and PCB manufacturers? Can we use these data to predict trace width and spacing for the target trace impedance or to calculate delays or evaluate the loss budget?
Successful signal integrity analysis depends on a fundamental concept: impedance. Without a thorough understanding of the impedance values that a signal encounters along the way, designers cannot maintain good signal quality from source to receiver.
Andy Shaughnessy, PCB Design007
Every January, I like to go back through the last year and see which articles had the highest number of views. They're usually the articles that bring you PCB design and industry information that's relevant to your job. Check out the most-read PCB design articles from 2016.