The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper presents a new simulation workflow for jitter separation analysis. Jitter separation is a very promising tool that quickly identifies the sources of signal integrity degradation and thus enables easy optimization of a design to meet the low jitter requirements of multi-gigabit high speed digital SERDES devices.
In this paper, the behavior in radiated mode of an EMI filter used in speed drives is analyzed. It was identified as one of the main sources of magnetic near field radiation. On one hand, the EMI filter is located upstream from the speed drive and is the victim of the other radiation sources of the speed drive. On the other hand, these sources excite its parasitic elements and create new resonance...
In this paper, we analyzed the behavior of a three phased inverter used in speed drives in radiated mode and we modeled it by equivalent diagrams representing electric operation and including parasitic elements. First, we tried to link the amplitude spectra of the radiated magnetic field and the electrical time measurements (currents). Then, under some assumptions, we proposed a modelling of the main...
In this paper deals, an equivalent circuit model of high impedance surfaces (HIS) employing arbitrarily shaped frequency selective surfaces (FSS) is presented. The conventional modelization of the HIS based on the averaged expressions for FSS impedance reveals sufficiently accurate both for normal and oblique incidence for simple FSS shapes, such as patches, and for suitably thick dielectrics. Here...
A novel technique to enlarge the absorption band of a high-impedance surface absorber has been proposed. The enlargement of the absorbtion band has been verified with numerical simulations.
In this paper a simple approach for defining the FSS printed element shape with wider band performance is presented. By means of circuit theory, it is demonstrated that the patch FSS with a small gap between the conductive squares is the best choice in designing a wideband AMC. Instead, for designing an extreme homogeneous HIS structure conserving a good bandwidth the meandered shape results a good...
In order to efficiently reduce electromagnetic interference emissions, especially common-mode (CM)-conducted noise emissions, which are the most disturbing in any variable-speed drive systems, the understanding of behavior and the knowledge of propagation path of parasitic currents in the system are essential. In this paper, a simple CM disturbances modeling is proposed to predict or estimate the...
It is increasingly important to use Controlled Impedance for manufacturing High-Speed and high density-interconnect (HDI) printed circuit board (PCB). Furthermore, signal integrity (SI) tools are required to prevent and reduce most of impedance mismatch and crosstalk problems. This paper presents the impedance characterization of PCB traces, created in an industrial context. From the first specifications...
In order to efficiently reduce EMI emissions, especially common mode (CM) conducted noise emissions that are the most disturbing in any adjustable-speed drive systems, behaviour understanding and propagation path knowing of parasitic currents in the system are indispensable. In this paper, a simple CM disturbances modelling is proposed to estimate or calculate the CM noise currents. The modelling...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.