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DC power-bus noise isolation with power-plane segmentation

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6 Author(s)
Wei Cui ; Missouri Univ., Rolla, MO, USA ; Jun Fan ; Yong Ren ; Hao Shi
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Power-plane segmentation is often used for DC power-bus noise isolation in multilayer printed circuit board (PCB) designs. To achieve a desirable noise isolation, different power-plane segmentations can be used. A suitable modeling approach, as well as measurements, were employed in this work to study the noise isolation with several power-plane segmentation designs. The geometries studied include power islands, and totally segmented power planes. The effects of the power-bus noise isolation with different types of power island connections, locations of segmentation, and shapes were analyzed, and compared. The modeled and measured results show that suitable power-plane segmentation can result in significant power-bus noise isolation.

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Electromagnetic Compatibility, IEEE Transactions on  (Volume:45 ,  Issue: 2 )