The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
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The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Les plans d'alimentation et de masse sur les PCB multicouches peuvent émettre efficacement des champs électromagnétiques excités par le bruit de commutation simultané du circuit intégré. Le rayonnement électromagnétique haute fréquence est souvent calculé à partir du champ électrique le long du bord du PCB, qui peut être estimé à l'aide d'un modèle de cavité utilisant des parois magnétiques. L'excitation des modes de cavité est liée au courant via traversant les plans du bus d'alimentation au niveau de l'interconnexion entre le boîtier IC et le PCB. Habituellement, l'attention se concentre sur le courant de mode différentiel des broches du boîtier, mais dans le présent article, il est montré que le courant de mode commun s'écoulant des broches du boîtier joue un rôle très important dans l'excitation des modes de la cavité et qu'il est négligé. implique une sous-estimation fatale du rayonnement électromagnétique des avions de transport d'énergie dans certaines circonstances. Une deuxième contribution importante au rayonnement est apportée par le courant de mode commun sur les broches, ainsi que par le courant circulant sur le plan de masse du PCB. Avec le circuit équivalent proposé, on étudie l'efficacité des inductances de découplage en fonction de leur localisation et de la valeur de la capacité parasite.
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Umberto PAOLETTI, Takashi HISAKADO, Osami WADA, "Importance and Limitations of Modeling Parasitic Capacitance between Package and PCB for Power Bus Noise and Radiation" in IEICE TRANSACTIONS on Communications,
vol. E92-B, no. 6, pp. 1937-1944, June 2009, doi: 10.1587/transcom.E92.B.1937.
Abstract: Power and ground planes on multilayer PCBs can effectively radiate electromagnetic fields excited by the IC simultaneous switching noise. The high frequency electromagnetic radiation is often calculated from the electric field along the edge of the PCB, which can be estimated with a cavity model using magnetic walls. The excitation of the cavity modes is related to the via current passing through the power bus planes at the interconnection between IC package and PCB. Usually the attention is focused on the differential-mode current of the package pins, but in the present paper it is shown that the common-mode current flowing out from package pins plays a very important role in the excitation of cavity modes, and its neglect implies a fatal underestimation of the electromagnetic radiation from the power bus planes in some circumstances. A second important contribute to the radiation is given by the common mode current on the pins, together with the current flowing on the PCB ground plane. With the proposed equivalent circuit, the effectiveness of decoupling inductors depending on their location and on the value of the parasitic capacitance is studied.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E92.B.1937/_p
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@ARTICLE{e92-b_6_1937,
author={Umberto PAOLETTI, Takashi HISAKADO, Osami WADA, },
journal={IEICE TRANSACTIONS on Communications},
title={Importance and Limitations of Modeling Parasitic Capacitance between Package and PCB for Power Bus Noise and Radiation},
year={2009},
volume={E92-B},
number={6},
pages={1937-1944},
abstract={Power and ground planes on multilayer PCBs can effectively radiate electromagnetic fields excited by the IC simultaneous switching noise. The high frequency electromagnetic radiation is often calculated from the electric field along the edge of the PCB, which can be estimated with a cavity model using magnetic walls. The excitation of the cavity modes is related to the via current passing through the power bus planes at the interconnection between IC package and PCB. Usually the attention is focused on the differential-mode current of the package pins, but in the present paper it is shown that the common-mode current flowing out from package pins plays a very important role in the excitation of cavity modes, and its neglect implies a fatal underestimation of the electromagnetic radiation from the power bus planes in some circumstances. A second important contribute to the radiation is given by the common mode current on the pins, together with the current flowing on the PCB ground plane. With the proposed equivalent circuit, the effectiveness of decoupling inductors depending on their location and on the value of the parasitic capacitance is studied.},
keywords={},
doi={10.1587/transcom.E92.B.1937},
ISSN={1745-1345},
month={June},}
Copier
TY - JOUR
TI - Importance and Limitations of Modeling Parasitic Capacitance between Package and PCB for Power Bus Noise and Radiation
T2 - IEICE TRANSACTIONS on Communications
SP - 1937
EP - 1944
AU - Umberto PAOLETTI
AU - Takashi HISAKADO
AU - Osami WADA
PY - 2009
DO - 10.1587/transcom.E92.B.1937
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E92-B
IS - 6
JA - IEICE TRANSACTIONS on Communications
Y1 - June 2009
AB - Power and ground planes on multilayer PCBs can effectively radiate electromagnetic fields excited by the IC simultaneous switching noise. The high frequency electromagnetic radiation is often calculated from the electric field along the edge of the PCB, which can be estimated with a cavity model using magnetic walls. The excitation of the cavity modes is related to the via current passing through the power bus planes at the interconnection between IC package and PCB. Usually the attention is focused on the differential-mode current of the package pins, but in the present paper it is shown that the common-mode current flowing out from package pins plays a very important role in the excitation of cavity modes, and its neglect implies a fatal underestimation of the electromagnetic radiation from the power bus planes in some circumstances. A second important contribute to the radiation is given by the common mode current on the pins, together with the current flowing on the PCB ground plane. With the proposed equivalent circuit, the effectiveness of decoupling inductors depending on their location and on the value of the parasitic capacitance is studied.
ER -