333 research outputs found
Electromagnetic Interference and Compatibility
No full textDue to the continuous progress in semiconductor technology and the rapidly evolving application scenarios, electromagnetic compatibility (EMC) is constantly raising new challenges and is a very dynamic field of research. In this context, this collection of papers, originally published in the “Electromagnetic Interference and Compatibility” Special Issue of Electronics for which I served as a Guest Editor, offers a vivid picture of the EMC research challenges and directions over the last
years in this complex and multifaceted field. Focusing on EMC in communication systems, the paper “Interference of Spread-Spectrum EMI and Digital Data Links under Narrowband Resonant Coupling” by Crovetti and Musolino highlights
how traditional methods like spread-spectrum clock modulation, developed with reference to AM and FM radio receivers, are no longer well suited to digital communications. In the very crucial field of EMC in power electronics, the paper “Signal Transformations for Analysis of Supraharmonic EMI Caused by Switched-Mode Power Supplies” by Sandrolini and Mariscotti explores advanced signal processing techniques (Wavelet Packet Transform and the Empirical Mode Decomposition) in the analysis of electromagnetic emissions of power converters, while in “Modeling and Optimization of Impedance Balancing Technique for Common Mode Noise Attenuation in DC-DC Boost Converters,” by Shuaitao Zhang et al. more conventional balancing techniques are optimized to attenuate common-mode emissions.
For new application scenarios, EMC challenges in emerging electric vehicles are addressed in “Electromagnetic Susceptibility of Battery Management Systems’ ICs for Electric Vehicles: Experimental Study,” by Aiello. Moreover, IC-level EMC issues in operational amplifiers are addressed in “EMI Susceptibility of the Output Pin in CMOS Amplifiers” by Richelli, Colalongo,and Kovacs-Vajna, and the susceptibility of Hall Effect sensors is studied in “Hall-Effect Curren
Sensors Susceptibility to EMI: Experimental Study” by Aiello. New contributions in the area of cross-talk reduction and signal/power integrity are presented in “A Novel Meander Split Power/Ground Plane Reducing Crosstalk of Traces Crossing Over” by Jung-Han Lee and in “A Dual-Perforation Electromagnetic Bandgap Structure for Parallel-Plate Noise Suppression in Thin and Low-Cost Printed Circuit Boards” by Myunghoi Kim.
The active research area on the EMC properties of materials and their application to the suppression of interference is represented in this volume by “Shielding Properties of Cement Composites Filled with Commercial Biochar” by Yasir et al. and by “Synthesis and Characterization of Polyaniline-Based Composites for Electromagnetic Compatibility of Electronic Devices” by Gareev et al. Last, but not least, new contributions on ferrite cores and their characterization are presented in
“Performance Study of Split Ferrite Cores Designed for EMI Suppression on Cables” by Suarez et al. and in “Simple Setup for Measuring the Response to Differential Mode Noise of Common Mode Chokes” by Gonzalez-Vizuete ́ et al.
Though not exhaustive, the papers collected in this volume can be useful to address practical EMC problems and stimulate future research and should be well received by the EMC communit
A survey of the grape phylloxera (Viteus vitifoliae (Fitch)) a century after its introduction
No full textMetodologie di lotta integrata per il controllo di Blattella germanica L. (Dictyoptera Blattellidae) su navi
No full textField and laboratory observations on some eco-ethological aspects of the grape phylloxera (Viteus vitifoliae (Fitch.)
No full textAmplificatore differenziale digitale a bassissimo consumo, per grandezze continue, in particolare per applicazioni IoT e/o biosensori
No full textLa presente invenzione riguarda un amplificatore digitale differenziale, a bassissimo consumo, per grandezze continue, in particolare per applicazioni IoT e/o biosensori.
Lo sviluppo di nodi Internet of Things (IoT) energeticamente autonomi e di biosensori di nuova generazione di dimensioni sub-millimetriche alimentati a distanza richiede che i circuiti integrati di interfaccia verso i sensori ultracompatti abbiano caratteristiche e prestazioni particolari. In particolare, è necessario che tali circuiti abbiano prestazioni configurabili in base all’energia a disposizione e siano in grado di funzionare a bassissime tensioni di alimentazione, molto spesso poco controllate ed estremamente variabili, come quelle che si possono ottenere ad esempio da energy harvester ultra-miniaturizzati. La realizzazione di circuiti di interfaccia con queste caratteristiche è particolarmente problematica per quei sensori che forniscono in uscita grandezze continue e/o quando il livello di accuratezza richiesto dall’applicazione è elevato, tanto da limitare fortemente la realizzabilità pratica in numerosi ambiti applicativi.
PLT112_IT
2
Negli ultimi anni, alcuni circuiti di interfaccia verso sensori
ultracompatti in grado di funzionare a basse tensioni di
alimentazione e con un bassissimo consumo di potenza (<10nW) [1-2]
sono stati sviluppati per applicazioni audio e acquisizione di
5 biosegnali (in particolare elettrocardiogramma, ECG). In queste
soluzioni, tuttavia, si fa sempre riferimento ad un sensore
accoppiato all’interfaccia tramite condensatore (cioè in alternata).
L’acquisizione di segnali con una componente continua, che è
richiesta per esempio per acquisire sensori di temperatura e sensori
10 elettrochimici, è maggiormente problematica e, di fatto, il livello
di accuratezza in continua richiesto in queste applicazioni è
ottenuto allo stato dell’arte con tecniche di chopping e di autozeroing,
al costo di un significativo consumo di potenza (>1μW), di
una elevata occupazione di area (mm2) ed anche di una ridotta
15 impedenza d’ingresso.
La Richiedente osserva che limitazioni sopra esposte non rendono
questi approcci adatti ad applicazioni di tipo IoT e/o a biosensori.
Breve descrizione dell’invenzione
20 Scopo della presente invenzione è quindi fornire un amplificatore
differenziale in grado di superare gli inconvenienti sopra
descritti
Studies for the realisation of a regional chart of dacic risk, based on climatic, phenological and biological parameters
No full textCharacterization of the Susceptibility to EMI of a BMS IC for Electric Vehicles by Direct Power and Bulk Current Injection
No full textIn this letter the susceptibility to Electromagnetic Interference of a Battery Management System for Lithium-Ion and Lithium Polymer battery packs employed in emerging electric and hybrid electric vehicles is addressed. For this purpose,
the susceptibility to EMI of a BMS front-end integrated circuit is experimentally assessed by the direct power injection and by the Bulk Current Injection method. Experimental results are shown and discussed to highlight different EMI-induced failure mechanisms
Determination of the life cycle of the olive fruit-fly (Dacus oleae (Gmelin)) by thermal units requirements in a biotope of the northern part of Tuscany
No full textThe heat-units accumulation method for forecasting the Dacus oleae (Gmelin) life-cycle: results of a study carried out in a biotope of the Southern Tuscany during the years 1978-1982
No full textLa difesa fitosanitaria. Sviluppo di metodologie e salvaguardia della produzione e dell’ambiente
No full text- …
