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Electrical and Computer Engineering
Electrical and Computer Engineering Faculty Research & Creative Works
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Noise Coupling Between Power/Ground Nets Due To Differential Vias Transitions In A Multilayer Pcb, Matteo Cocchini, Jun Fan, Bruce Archambeault, James L. Knighten, Xin Chang, James L. Drewniak, Yaojiang Zhang, Samuel R. Connor
Noise Coupling Between Power/Ground Nets Due To Differential Vias Transitions In A Multilayer Pcb, Matteo Cocchini, Jun Fan, Bruce Archambeault, James L. Knighten, Xin Chang, James L. Drewniak, Yaojiang Zhang, Samuel R. Connor
Electrical and Computer Engineering Faculty Research & Creative Works
Due to the increase in board density, routing traces on different layers becomes a widely used strategy. Through-hole vias are often used to connect these traces. Those vias that penetrate power/ground plane pairs could cause noise coupling between signal and power/ground nets. At the same time, the need for clean signal transmitted to receivers results in a wide use of differential signals. This paper studies the noise coupling mechanism caused by a differential pair of vias penetrating power/ground plane pair using a physics-based via-plane model combined with transmission line models for traces. A 26-layer printed circuit board with a pair …
Estimating Maximum Radiated Emissions From Printed Circuit Boards With An Attached Cable, Shaowei Deng, Todd H. Hubing, Daryl G. Beetner
Estimating Maximum Radiated Emissions From Printed Circuit Boards With An Attached Cable, Shaowei Deng, Todd H. Hubing, Daryl G. Beetner
Electrical and Computer Engineering Faculty Research & Creative Works
The common-mode current induced on cables attached to printed circuit boards can be a significant source of radiated emissions. Previous studies have shown that coupling from electric and magnetic field sources on circuit boards can be effectively modeled by placing equivalent voltage sources between the board and the cable. The amplitude of these equivalent sources can be estimated by using closed-form equations; however, estimates of the radiated emissions from these board-cable geometries have required full-wave simulations, and full-wave simulation results depend on the exact cable length and placement, which are not normally fixed during radiated emissions testing. This paper develops …