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This paper investigates the sensitivity of the on-wafer interconnects to the Si CMOS process parameters. Experiments are conducted to emulate state-of-the-art and future technologies. S-parameters of the interconnect have been examined. The influence of the process parameters on the transmission and reflection capacities of the on-wafer interconnects are discussed
In this paper, EMC analysis on stacked packages using different simulation methods is presented. A large part of the EMC control is the understanding of different resonances emerging in the package. At the resonances frequencies, both the internal noise sources inside the package and the external noise sources outside the package are generating strong fields and voltages, and the package is most vulnerable...
Different types of board-level noise filters are evaluated for their effectiveness to improve the immunity of CMOS ICs against transient-induced latchup (TLU) under system-level electrostatic discharge (ESD) test. By choosing proper components in each noise filter network, the TLU immunity of CMOS ICs can be greatly improved. All the experimental evaluations have been verified in test chips with the...
This paper proposes a new integrated inductor with balanced switching technique applied for high step-up converter. The advantage of the proposed converter is the reduction of the common mode conducted EMI using balanced switching technique. This step-up converter requires more magnetic components than that of the conventional converter. Therefore, the integrated magnetic technique is proposed to...
Large-scale radio frequency identification (RFID) deployment is needed for efficient item identification in supply chains. To reduce cost and save time, simulations are often carried out before actual implementation, especially when RFID is used in regions in which strict regulations and standards must be adhered to. However, due to the unpredictable environmental effects on radio propagation simulation,...
The increasing awareness of power saving as well as the ever rising dynamic requirements in industrial machine tool applications have led to an unpredicted popularity of power-drive systems with energy regeneration capability. This trend is supported by the fact, that such drives continuously become smaller, more efficient and lower in cost. The downside of regeneration drives is the higher noise...
This paper investigates the effect of different ground plane configurations of a typical internal planar inverted-F patch antenna (PIFA) on specific absorption rate (SAR). The effect of the size and the addition of vertical sidewall of the ground plane are investigated; it is found that by varying the ground plane locations and configurations, SAR value can be reduced by 15%
Shielding effectiveness measurements have been performed using a reverberation chamber. The reverberation chamber methodology as well as the measurement setup is described and some results are given. Samples include glass reinforced plastic panels, aluminum panels with many holes, wire mesh, among others. The reverberation chamber setup gives very repeatable measurement results
Independent boundary condition is a key factor in the prediction of maximal electric field level in a reverberation chamber and it determines the number of independent sampling points that stirrers can generate. With different independent sampling points the expected maximal electrical fields are different. With a fixed number of independent sampling points the average maximum of electric field is...
NSA and its correction factors are analyzed theoretically and simulated by the moment method using a model of the improved biconical antenna that has no abnormal resonance phenomena, NSA and its correction factors. The results show that 3 kinds of correction factor were necessary for a good agreement between simulated NSA values and the CISPR standard value
In CISPR 20, radiated immunity test is performed in the open stripline (OSL) which height is 0.8 m. CISPR 20 also specifies that equipment not fitting inside open stripline shall be measured according to IEC 61000-4-3 in frequency range of 80 MHz to 150 MHz with the same limits as in the OSL. In this paper, the analysis of the field distribution in the OSL was completed by moment method and the testing...
The multilayer technology where passive components are integrated in printed circuit boards is one of the interesting projects to obtain a volume reduction of classical circuits. Using layers of conductive permeable materials in the multilayer architecture the same layer is performing both the EMC-shielding of stray fields and works as the core for the integrated inductive components. In this paper...
Because of increasing the electronics in a car, the automotive industry researches for simulating the whole system and how each element could influence another unexpected element. These are often caused by conducted emissions, which are a major challenge in the simulation of automotive systems. One important task is modeling power-ICs to simulate the switching depending on the load. Although circuit...
While nickel-zinc composition soft ferrites are routinely used for PCB EMI suppression, the consequences of DC and low frequency AC bias on a device's high frequency impedance has not been widely discussed in the EMC and magnetic component literature. Virtually all EMI suppression applications in DC and AC power filter circuits place two-terminal ferrites under bias. This paper discusses the impact...
In the future power converter applications will become more and more important as a part of the whole electronic system in an automobile because of the increasing number of devices. Building these converters with planar PCB-based coils makes them more robust against vibrations and cheaper in mass production. With the analysis method presented in this paper the influence of the automobile carriage...
In this paper, the simulation technique which can be used at the design stage is described in order to efficiently develop low electromagnetic emission type lighting implement employing 3-D FEM. Especially, the modeling of the fluorescent lamp, which is thought to be the largest emission noise source from lighting implement, is examined by applying the theory that the electron density distribution...
Electrical breakdown of microstrip interconnects and coplanar waveguide-built devices in the presence of high-power electromagnetic pulses (HP-EMP) is addressed in this paper, and some effective methodologies are outlined and proposed for fast predicting maximum current carrying density of bonding wire, electric field breakdown strength of thin film capacitors, average and peak power handling capabilities...
One of the major concerns in designing a modem for power line communication (PLC) is the existence of common mode (CM) RF current, which generates radiated emissions that could interfere with some other communications users. Magnetic transformers have long been used in the analog front end (AFE) circuit of PLC modems to transmit high frequency (1 to 30 MHz) broadband signals onto power network and...
To study the resonance in transformer windings, under very fast transient overvoltages (VFTOs) generated by switching operations in gas insulated substation (GIS), a single input and multiple output circuit model is presented in this paper which is based on multi-conductor transmission line (MTL) model of transformer windings. The procedure to determine the transfer function is deduced. The resonant...
Method-of-moments simulation is used to determine the electric field in a TEM cell. As the excitation frequency increases, the simulation shows the expected break-down in TEM mode behaviour. The research characterises the resonances in the TEM cell, in order to form a basis for determining ways to deal with resonances when using a TEM enclosure above the first resonant frequency. This is an important...
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