DC Power-Bus Noise Isolation with Power-Plane Segmentation

James L. Drewniak, Missouri University of Science and Technology
Richard E. DuBroff, Missouri University of Science and Technology
Wei Cui
Jun Fan, Missouri University of Science and Technology
Yong Ren
Hao Shi

This document has been relocated to http://scholarsmine.mst.edu/ele_comeng_facwork/955

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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.