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This paper is devoted to a detailed experimentally based analysis of applicability of vector network analyzers for measuring impedance of surface mount inductors with and without DC bias. The measurements are made using custom-made bias tees and a test fixture with an ordinary vector network analyzer. The main attention in the analysis is focused on measurement accuracy of an impedance of surface...
The Electromagnetic Compatibility (EMC) means the ability of equipment to function satisfactorily in its electromagnetic environment without introducing intolerable electromagnetic disturbances to other equipment in that environment. There are different methods how to check if given electrical device complies with specific emission or immunity standards. This work is focused only on radiated emissions...
This paper presents 3D electromagnetic modelling of surface mount (SM) capacitors and the mutual couplings between them. 3D electromagnetic modelling software CST MWS is used for this purpose. Various SM multi-layer ceramic capacitor models are proposed and modelled. The modelling results are then verified experimentally. Comparison of the modelling and experimental results in terms of transmission...
Mutual couplings between EMI filter components are of key concern when designing EMI filters for EMI attenuation in high frequency range. To reduce the parasitic couplings and improve EMI attenuation conductive shields can be placed between the components. This paper presents modeling and measurements of EMI filters with copper shields placed between the filter components. 3D electromagnetic field...
Modeling of differential mode EMI filter is presented in this paper. 3D electromagnetic field modeling software CST MWS is used as a simulation tool. EMI filter consisting of two capacitors and two inductors is modeled considering parasitic mutual couplings between EMI filter components. Modeling is performed for different positions of capacitors and inductors on both single-sided and double-sided...
This paper deals with modeling of differential mode Il-type EMI power filter using 3D electromagnetic field modeling software CST MWS. Two scenarios are considered: inductor is positioned in parallel or perpendicular to capacitors. Capacitor distance and PCB track layout is changed to verify software modeling precision and capabilities. Measurement and modeling results are in good agreement.
This paper deals with modeling of mutual couplings between passive EMI filter components: inductors and capacitors positioned on printed circuit board. 3D electromagnetic software CST MWS is used for the modeling. Three scenarios are considered: mutual couplings between two capacitors, mutual couplings between two inductors and mutual couplings between inductor and capacitor. Modeling results are...
This paper is devoted to EMI filter inductor modeling and mutual coupling modeling between two inductors positioned on PCB. 3D inductor models are developed and modeled in CST MWS. Comparison of inductors mutual coupling measurement and modeling results show that transfer coefficients can be predicted accurately. CST MWS has been used also to predict effective mutual coupling reduction techniques.
In this paper modeling of EMI filter capacitors and modeling of mutual couplings between them is presented. The modeling has been done using 3D electromagnetic software CST MWS. Three capacitor models have been proposed and verified experimentally. All proposed models during verification have shown that their performance is high enough to enable PCB mounted capacitor modeling and mutual inductance...
Matrix converter inherently exhibits sinusoidal input current waveforms and has less stressful output voltage waveforms, but it is causing problems with conducted and radiated emissions. This paper deals with matrix converter emitted disturbances from point of view of electromagnetic compatibility (EMC) standard EN61800-3 and allocates the sources of undesirable emissions.
A 10.3 GS/s ADC with 5 GHz input BW and 6 bit resolution in 90 nm CMOS is presented. The architecture is based on an 8 way interleaved/ pipelined ADC using open-loop amplifiers and digital calibration. The measured performance is 5.8 ENOB (36.6 dB SNDR) for a 100 MHz input signal and 5.1 ENOB (32.4 dB SNDR) for a 5 GHz input (Nyquist) with phase offset correction across the interleaved array.
Multi-mode fibers (MMF) are typically used in LAN applications, in links which may reach or exceed 300 meters. Widespread use of electronic dispersion compensation (EDC) for MMF is prompted by the ratification of the 10GBASE-LRM standard. A number of studies have demonstrated the superiority of MLSD for this application. This paper describes an all-DSP single-chip 90nm CMOS MLSD-based EDC transceiver...
This paper presents the architecture and circuit design of a single chip 32 mm2 90 nm CMOS DSP transceiver for electronic dispersion compensation (EDC) of multimode fibers at 10 Gb/s, based on maximum likelihood sequence detection (MLSD). This is the first MLSD-based transceiver for multimode fibers and the first fully integrated DSP based transceiver for optical channels reported in the technical...
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