Items Tagged with 'PDN'

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Why You Need to Care About Both S and Z Parameters for PDN

I often get questions from my fellow design engineers from around the world asking why we should or should not use S parameters or Z parameters for power distribution network (PDN) designs or validation.  The truth is, we should be familiar with both, because depending on our design and validation tools, one or the other may be better suited for the task. Read on to find out why.


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How Ground Bounce Can Ruin Your Day

Low-speed printed circuit board (PCB) designs now have to deal with high-speed switching problems. This article examines the ground bounce generated from an LCD assembly while evaluating the impact of the ground bounce on the system level EMI. Three solution strategies to mitigate the ground bounce are analyzed, the pros and cons of each strategy are provided along with the test results.


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Why 2-Port Low-Impedance Measurements Still Matter

Measuring small resistance values is not trivial, but since 1861, when Lord Kelvin invented the Kelvin bridge,1 we at least have a solution for measuring very low DC resistances: the four-wire Kelvin connection (see Figure 1). We measure the resistance by sending a known current through the resistor and measure the voltage drop using separate wires.


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