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Surface current distribution provides an intuitive perspective on how the current flows, which is critical for high speed design. The surface current distribution for the power distribution network (PDN) in printed circuit board (PCB) is related to the input impedance observed by the IC looking into the PCB PDN. Two different principle methods are used to describe the current distribution, namely...
PCB-PDN design remains a challenge with the reducing noise margins. One aspect of PDN design is finding the number of decoupling capacitors required for each power rail. As more capacitors are added, the mid frequency equivalent inductance in the impedance of the PCB-PDN converges to a minimum value for each placement pattern. This convergence is studied for different placement patterns to find the...
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