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  • Electromagnetic interference reduction in printed circuit boards by using metamaterials: a conduction and radiation impact analysis

     Gil Galí, Ignacio; Fernández García, Raúl
    Journal of electromagnetic waves and applications
    Date of publication: 2014-02-11
    Journal article

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  • Evaluation of operational amplifier immunity by means of Weibull distribution

     Fernández García, Raúl; Gil Galí, Ignacio
    International Symposium on Electromagnetic Compatibility
    Presentation's date: 2013-09
    Presentation of work at congresses

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    The immunity of operational amplifiers is a trend topic for electromagnetic compatibility EMC community. Radiofrequency interference is usually applied to the operation amplifier and the voltage offset is monitored as a parameter to evaluate the EMC degradation. However, this method does not provide enough information to know the probability of failure to electromagnetic interference of the devices. In this paper, an alternative statistical analysis based on the Weibull distribution is used to analyze the electromagnetic immunity performance of operational amplifiers under different frequency interferences and modulation index. The results confirm the feasibility of the Weibull distribution to evaluate the radiofrequency interference RFI behavior.

  • Differential and common-mode filters based on metamaterial resonators

     Gil Galí, Ignacio; Fernández García, Raúl
    International Symposium on Electromagnetic Compatibility
    Presentation's date: 2013-09-05
    Presentation of work at congresses

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    Two different techniques based on metamaterials for mitigating both the differential and common-mode propagation in differential signaling are addressed. The proposed filters are implemented by means of complementary split ring and spiral resonators applied to coupled parallel microstrip lines. Frequency response, signal integrity and radiation emission are analyzed.

  • Characterization of conducted emission at high frequency under different temperature

     Berbel Artal, Nestor; Fernández García, Raúl; Gil Galí, Ignacio
    International Workshop on Electromagnetic Compatibility of Integrated Circuits
    Presentation's date: 2013-12-17
    Presentation of work at congresses

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    In this paper, the characterization of the EMC conducted emissions of integrated circuits under different temperature stress condition, up to 3 GHz is presented. The impact of high temperature has been measured on the input impedance of propagation paths of the electromagnetic conducted emissions, as well as on the electromagnetic noise of a clock generator.

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    An alternative method to quantify the electromagnetic immunity based on the Weibull distribution  Open access

     Fernández García, Raúl; Gil Galí, Ignacio
    IEICE electronics express
    Date of publication: 2013
    Journal article

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    It is accepted that the electromagnetic interference should be addressed with statistical analysis. Usually the impact of electromagnetic interference on different electronic samples is evaluated and the average immunity level is used as a reference. However, this method does not provide enough information to know the probability of failure to the electromagnetic interferences of an electronic circuit. An alternative statistical analysis based on the Weibull distribution is presented. The typical and proposed methods have been compared in order to analyse the electromagnetic immunity performance of two types of operational amplifier. The results confirm the feasibility of the proposed method.

    It is accepted that the electromagnetic interference should be addressed with statistical analysis. Usually the impact of electromagnetic interference on different electronic samples is evaluated and the average immunity level is used as a reference. However, this method does not provide enough information to know the probability of failure to the electromagnetic interferences of an electronic circuit. An alternative statistical analysis based on the Weibull distribution is presented. The typical and proposed methods have been compared in order to analyse the electromagnetic immunity performance of two types of operational amplifier. The results confirm the feasibility of the proposed method.

  • Circuitos de Microondas

     Gil Galí, Ignacio; Recasens i Aloy, Carles; Sánchez Delgado, Albert-Miquel
    Date of publication: 2013-02-01
    Book

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    Radiofrequency interferece filters design based on complementary split rings resonators  Open access

     Pérez, Daniel; Gil Galí, Ignacio; Fernández García, Raúl
    Progress in Electromagnetics Research Symposium
    Presentation's date: 2012-08
    Presentation of work at congresses

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    Low frequency analog and digital electronic circuits are susceptible to radiofre- quency interference (RFI). This disturbance is produced when the coupled RF signal is recti¯ed by the non-linear behavior of the semiconductors used in the small signal analog input stages of the electronic system. These circuits present an AM demodulation e®ect produced by nonlinear- ity of internal transistors, generating parasitic signals in the low-frequency range and undesired o®set voltage. In this paper, an alternative to the current standard EMI ¯lters is presented by combining the conventional printed circuit board layout with complementary split ring resonators (CSRRs), in order to reduce the output o®set impact due to RFI. An operational ampli¯er circuit has been designed with a 4-stage CSRR ¯lter, electromagnetically simulated and experimentally tested. Two prototypes have been implemented, with and without CSRRs in order to compare the ¯lter properties in standard FR4 substrate. The resonance frequency of the CSRRs has been designed in the vicinity of 2.4 GHz in order to prevent susceptibility in the ISM band. Electro- magnetic and electrical equivalent circuit model simulations are also provided and compared with experimental results. Measurement data show an e®ective rejection of the undesired RF demod- ulation without a®ecting the signal integrity out of the ¯lter band, and therefore a signi¯cant reduction concerning output o®set voltage impact in terms of RFI amplitude with no-extra cost in terms of the device area or manufacturing process.

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    Characterization and modelling of EMI susceptibility in integrated circuits at high frequency  Open access

     Gil Galí, Ignacio; Fernández García, Raúl
    International Symposium on Electromagnetic Compatibility
    Presentation's date: 2012-09
    Presentation of work at congresses

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    In this paper an alternative method for characterizing and modelling the EMI susceptibility in integrated circuits at frequencies above 1 GHz is presented. The PCB layout design is focused on the optimization of the impedance mismatch losses on the radio frequency interference injection path. The PCB has been tested with several commercial operational amplifiers and the methodology is validated through both electrical transmission line simulations and electromagnetic cosimulations.

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    Impact of temperature on the electromagnetic susceptibility of operational amplifiers  Open access

     Fernández García, Raúl; Gil Galí, Ignacio
    Progress in Electromagnetics Research Symposium
    Presentation's date: 2012-08
    Presentation of work at congresses

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    In this paper, the impact of temperature on the electromagnetic susceptibility of operational ampli¯ers at di®erent frequencies is presented. The IEC 62132-4 direct power injection standard has been used with several commercials operational ampli¯ers in a printed circuit board speci¯cally fabricated. The results show that the susceptibility of the operationals ampli¯er is reduced with the temperature.

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    Parametric design of stop band pass filter based on RF metamaterials in LTCC technology  Open access

     Morata Cariñena, Marta; Gil Galí, Ignacio; Fernández García, Raúl
    Progress in Electromagnetics Research Symposium
    Presentation's date: 2012-08
    Presentation of work at congresses

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    This paper presents a novel approach to design a parametric RF stop band pass ¯lter based on Low Temperature Co-¯red Ceramic (LTCC) Technology. The LTCC technology enables to miniaturize and development compact structures using not only the standard xy-planar circuit dimensions but also the z-height dimension. The proposed ¯lters topologies are based on a stripline loaded with one or several complementary rings resonator (CSRRs). Speci¯cally, a parametric study z-location of the stripline respect to the CSRRs is carried out in order to determine the optimum con¯gurations operating in the Ku-band.

  • Parametric design of stop-band-filter based on RF metamaterials in LTCC technology

     Morata Cariñena, Marta; Gil Galí, Ignacio; Fernández García, Raúl
    Progress in Electromagnetics Research Symposium
    Presentation's date: 2012-08-21
    Presentation of work at congresses

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  • Radiofrequency interference filters design based on complementary split rings resonators

     Perez Robles, Daniel; Gil Galí, Ignacio; Fernández García, Raúl
    Progress in Electromagnetics Research Symposium
    Presentation's date: 2012-08-21
    Presentation of work at congresses

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    Impact of temperature on the electromagnetic compatibility susceptibility of operational amplifiers  Open access

     Fernández García, Raúl; Gil Galí, Ignacio
    Progress in Electromagnetics Research Symposium
    Presentation's date: 2012-08-22
    Presentation of work at congresses

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    In this paper the impact of temperature on the electromagnetic susceptibility of operational amplifiers at different frequencies is presented. The IEC 62132-4 direct power injection standard has been used with several commercials operational amplifiers in a printed circuit board specifically fabricated. The results show that the susceptibility of the operationals amplifier is reduced with the temperature.

    Postprint (author’s final draft)

  • Una propuesta de utilización de la plataforma educativa Moodle para la enseñanza de circuitos y dispositivos electrónicos

     Fernández García, Raúl; Gil Galí, Ignacio
    Congreso Universitario de Innovación Educativa en las Enseñanzas Técnicas
    Presentation's date: 2012-07-19
    Presentation of work at congresses

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    Design of a 20 GHz DPI method for SOIC8  Open access

     Land, S.O.; Perdriau, R.; Ramdani, M.; Gil Galí, Ignacio; Lafon, F.
    International Symposium on Electromagnetic Compatibility
    Presentation's date: 2012-09-20
    Presentation of work at congresses

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    The direct power injection (DPI) test defined in IEC 62132-4 measures the conducted immunity of integrated circuits (ICs) up to 1 GHz. As the frequency of functional and interference signals is increasing, we would like to characterise immunity for higher frequencies as well. In this paper, we show why typical IEC 62132-4 compliant DPI set-ups become inaccurate when going up to 20 GHz. We propose to determine the power Ptrans actually transmitted to the device under test (DUT) by using offline short-open-load-thru (SOLT) or thru-reflect-line (TRL) calibration. Furthermore, we design a low-cost FR4 printed circuit board (PCB) that allows for testing of SOIC8-packaged ICs. We verify that this board has acceptable and reproducible losses up to 20 GHz, as well as acceptable crosstalk.

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    Hard-less common mode active EMI filter  Open access

     Perez Robles, Daniel; Gonzalez Diez, David; Mon Gonzalez, Juan; Balcells Sendra, Josep; Gil Galí, Ignacio; Gago Barrio, Javier; Bogonez Franco, Francisco
    Colloque International et Exposition sur la Compatibilité Electromagnétique
    Presentation's date: 2012-06-26
    Presentation of work at congresses

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    Active EMI filters appear as an alternative to classical EMI filters based on passive components. Active EMI filters can provide more compact, cheaper and lighter solutions than passive approach. In this paper we present a theoretical analysis of the 4 possible configurations. Expressions of the transfer function and insertion losses considering impedances of mains and source of noise are presented. The voltage-current topology is identified as the more convenient solution. Finally, preliminary experimental results of a prototype capable to provide attenuation up to 100MHz are shown.

  • EMI reduction by means of switching frequency modulation with variable delay in power supplies

     Mon Gonzalez, Juan; Gago Barrio, Javier; Gonzalez Diez, David; Balcells Sendra, Josep; Fernández García, Raúl; Gil Galí, Ignacio; Bogonez Franco, Francisco
    International journal of electronics
    Date of publication: 2012-01
    Journal article

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    Reduction of electromagnetic interference susceptibility in small-signal analog circuits using complementary split-ring resonators  Open access

     Perez Robles, Daniel; Gil Galí, Ignacio; Gago Barrio, Javier; Fernández García, Raúl; Balcells Sendra, Josep; Gonzalez Diez, David; Berbel Artal, Nestor; Mon Gonzalez, Juan
    IEEE TRANSACTIONS ON COMPONENTS, PACKAGING AND MANUFACTURING TECHNOLOGY
    Date of publication: 2012-02-10
    Journal article

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    Low-frequency analog and digital electronic circuits are susceptible to electromagnetic interference in the radiofrequency (RF) range. This disturbance is produced when the coupled RF signal is rectified by the nonlinear behavior of the semiconductors used in the small-signal analog input stage of the electronic system. Circuits based on operational amplifiers are usually employed for such input stages. These circuits present an amplitude modulation demodulation produced by the nonlinearity of internal transistors. Such a phenomenon generates demodulated signals in the low-frequency range. In this paper, this effect is suppressed by combining the conventional printed circuit board layout with complementary split-ring resonators (CSRRs). CSRRs are constitutive elements for the synthesis of metamaterials with negative effective permittivity, which are mainly excited to the host line by means of electric coupling. Electromagnetic simulations and experimental results show an effective rejection of the undesired RF demodulation effect with no extra cost in terms of the device area or manufacturing process.

  • Current Consumption and Power Integrity of CMOS Digital Circuits Under NBTI Wearout

     Ruiz, Joel M.; Fernández García, Raúl; Gil Galí, Ignacio; Morata Cariñena, Marta
    Journal of electronic testing. Theory and applications
    Date of publication: 2012
    Journal article

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    Electromagnetic compatibility of CMOS circuits along the lifetime  Open access

     Fernández García, Raúl; Ruiz, José María; Gil Galí, Ignacio; Morata Cariñena, Marta
    Progress in Electromagnetics Research Symposium
    Presentation's date: 2011-03
    Presentation of work at congresses

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    The continuous scaling of CMOS circuits has set the MOSFET transistor in the nanoelectronic era. In this context, the functionality and complexity of integrated circuits (ICs) are growing up. However, the operation voltage has been continuously reduced. The higher complexity of ICs has allowed including electronic systems in a lot of safety critical applications (i.e., automotive, aeronautics and/or medical applications). Therefore, the functionality of these electronic equipments must be assured and the risk of electromagnetic interference (EMI) must be reduced during their lifetime. Nowadays, circuits’ robustness to electromagnetic interference is checked in a burn-in component, without taking into account the impact of the natural devices’ aging. However, shrunk dimensions imply the appearance of several wear out mechanisms, which can limit the functionality of the circuits and modify their electromagnetic performance. Therefore, the time dependence of electromagnetic behaviour, which is known as Electromagnetic Robustness or Electromagnetic Reliability (EMR), should be evaluated. The switching noise is probably one of the main EMC emission problems in CMOS circuits. It is know that wear out mechanism affects the switching behaviour of CMOS circuits. Therefore, some effects on EMC performance of these circuits should be expected. In this work, the switching noise behaviour or CMOS circuits under one of the most important reliability problems are analysed by means of electrical simulation. In order to do that, a characterization of wear out mechanism on single MOSFET is presented and modelled. The results show a reduction on the frequency switching noise emission in circuits subjected to wear out, due to the reduction of the drain current of MOSFET.

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    Ring oscillator switching noise under NBTI wearout  Open access

     Fernández García, Raúl; Gil Galí, Ignacio; Ruiz, Joel M.; Morata Cariñena, Marta
    European Symposium on Electromagnetic Compatibility
    Presentation's date: 2011-09
    Presentation of work at congresses

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    In this paper the switching noise of a CMOS ring oscillator has been analysed when their pFETs are subjected to negative bias temperature instability (NBTI). The impact of pFET under NBTI has been experimentally quantified whereas CMOS ring oscillator frequency and the switching noise has been analysed by means of electrical full-model simulation. The results show that the impact on the electromagnetic compatibility behaviour increases with NBTI wearout. © 2011 EMC Europe.

    In this paper the switching noise of a CMOS ring oscillator has been analysed when their pFETs are subjected to negative bias temperature instability (NBTI). The impact of pFET under NBTI has been experimentally quantified whereas CMOS ring oscillator frequency and the switching noise has been analysed by means of electrical full-model simulation. The results show that the impact on the electromagnetic compatibility behaviour increases with NBTI wearout.

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    An alternative approach to model the internal activity of integrated circuits.  Open access

     Berbel Artal, Nestor; Fernández García, Raúl; Gil Galí, Ignacio; Li, Binhong; BenDhia, S.; Boyer, A.
    International Workshop on Electromagnetic Compatibility of Integrated Circuits
    Presentation's date: 2011-11-07
    Presentation of work at congresses

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    This paper deals with the EMC modeling of integrated circuits and the standardized model IEC 62433-2 (Integrated Circuit Emission Model – Conducted Emission [1]). This standardized model has been applied into a basic digital circuit: a ring oscillator. This work presents an alternative approach to model and quantify the Internal Activity of any digital or analog integrated circuit, and its use has been applied on the ring oscillator.

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    Experimental verification of the usefulness of the n-th power law MOSFET model under hot carrier wearout  Open access

     Berbel Artal, Nestor; Fernández García, Raúl; Gil Galí, Ignacio; Li, Binhong; Boyer, A.; BenDhia, S.
    European Symposium on Reliability of Electron Devices, Failure Physics and Analysis
    Presentation's date: 2011-10
    Presentation of work at congresses

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    In this paper the usefulness of the nth power law MOSFET model under Hot Carrier Injection (HCI) wearout has been experimentally demonstrated. In order to do that, three types of nFET transistors have been analyzed under different HCI conditions and the nth power law MOSFET model has been extracted for each sample. The results show that the model can reproduce the MOSFET behavior under HCI wearout mechanism. Therefore, the impact of HCI on circuits can be analyzed by using the nth power law MOSFET model.

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  • Reconfigurable RF-MEMS Metamaterials Filters

     Gil Galí, Ignacio; Morata Cariñena, Marta; Fernández García, Raúl; Rottenberg, Xavier; De Raedt, Walter
    Progress in Electromagnetics Research Symposium
    Presentation's date: 2011-03
    Presentation of work at congresses

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  • Analysis and characterization of coupled transmission lines loaded with complementary spiral resonators

     Gil Galí, Ignacio; Fernández García, Raúl; Balcells Sendra, Josep
    IET microwaves antennas and propagation
    Date of publication: 2011-02-21
    Journal article

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  • CARACTERIZACION Y MODELADO DE LA FIABILIDAD Y ROBUSTEZ DE INTERFERENCIAS ELECTROMAGNTICAS RADIOFRECUENCIA CIRCUITOS INTEGRADOS

     Fernández García, Raúl; Berbel Artal, Nestor; Gil Galí, Ignacio
    Participation in a competitive project

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  • Premi Extraordinari de Doctorat

     Gil Galí, Ignacio
    Award or recognition

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  • Experimental verification of the usefulness of the nth power law MOSFET model under hot carrier wearout

     Berbel Artal, Nestor; Fernández García, Raúl; Gil Galí, Ignacio; Li, B.; Boyer, A.; BenDhia, S.
    Microelectronics reliability
    Date of publication: 2011-11
    Journal article

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    A new approach to modelling the impact of EMI on MOSFET DC behavior  Open access

     Fernández García, Raúl; Gil Galí, Ignacio; Boyer, A.; BenDhia, S.; Vrignon, Bertrand
    IEICE transactions on electronics
    Date of publication: 2011-12-12
    Journal article

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    A simple analytical model to predict the DC MOSFET behavior under electromagnetic interference (EMI) is presented. The model is able to describe the MOSFET performance in the linear and saturation regions under EMI disturbance applied to the gate. The model consists of a unique simple equivalent circuit based on a voltage dependent current source and a reduced number of parameters which can accurately predict the drift on the drain current due to the EMI source. The analytical approach has been validated by means of electric simulation and mesaurement and can be easily introduced in circuit simulators. The proposed modeling technique combined with the nth-power law model of the MOSFET without EMI, significantyly improves its accuracy in comparison with the n-th power law directy applied to a MOSFET under EMI impact.

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    Modeling tunable band-pass filters based on RF-MEMS metamaterials  Open access

     Morata Cariñena, Marta; Gil Galí, Ignacio; Fernández García, Raúl
    International journal of numerical modeling. Electronic networks devices and fields
    Date of publication: 2011-02-01
    Journal article

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    This work describes progress toward designing and modeling reconfigurable band-pass filters based on RF microelectromechanical systems (RF-MEMS) metamaterials. A device consisting of a coplanar waveguide structure that combines complementary split ring resonators (CSRRs) and RF-MEMS varactor bridges, operating at K and Ka-band, is proposed. Several layouts have been designed and electromagnetically (EM) simulated. A full equivalent-circuit model for the description of the proposed structure, including transmission lines, RF-MEMS, subwavelength resonators and coupling parameters, is provided. A high degree of accuracy between EM simulations behavior and electrical model has been obtained.

  • EMI Reduction in Parallel Multiconverter Topology Using Interleaving and Frequency Modulation Techniques

     Mon Gonzalez, Juan; Gago Barrio, Javier; Gonzalez Diez, David; Balcells Sendra, Josep; Fernández García, Raúl; Gil Galí, Ignacio; Bogonez Franco, Francisco
    Przeglad elektrotechniczny
    Date of publication: 2010-10
    Journal article

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  • Potenciación del aprendizaje autónomo en electrónica analógica mediante el simulador Multisim

     Gil Galí, Ignacio; Fernández García, Raúl
    International Congress of University Teaching and Innovation
    Presentation's date: 2010-06-30
    Presentation of work at congresses

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    An alternative characterization method of PFET sub-threshold slope under NBTI stress  Open access

     Fernández García, Raúl; Gil Galí, Ignacio
    European Solid-State Device Research Conference
    Presentation's date: 2010-09
    Presentation of work at congresses

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    The effects of negative bias temperature instability (NBTI) on the sub-threshold performance of a pFET have been investigated by means of experimental methods. Specifically, the sub-threshold slope under static and dynamic NBTI stress has been characterized for different NBTI stress conditions. In order to perform the characterization, a proposal based on an alternative measurement technique to obtain the sub-threshold slope is presented. Our first results indicate that similar sub-threshold slope is obtained in all stress conditions.

  • Comparison between complementary split ring resonators and electromagnetic band-gap as EMI reduction structures

     Gil Galí, Ignacio; Fernández García, Raúl
    European Symposium on Electromagnetic Compatibility
    Presentation of work at congresses

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  • Impact of NBTI on EMC behaviours of CMOS inverter

     Fernández García, Raúl; Berbel Artal, Nestor; Gil Galí, Ignacio; Morata Cariñena, Marta
    Asia-Pacific Symposium on Electromagnetic Compatibility
    Presentation's date: 2010-04-15
    Presentation of work at congresses

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    In this paper the Electromagnetic Robustness (EMR) of a CMOS inverter has been analyzed when the pFETs are submitted to negative bias temperature instability (NBTI). The impact of pFET and CMOS inverter has been experimentally quantified and the switching noise and electromagnetic susceptibility has been analyzed by means of simulation. The results show that NBTI reduces the switching noise whereas the EMI susceptibility is not modified.

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    Optimized passive devices for low-power LNA design  Open access

     Gil Galí, Ignacio; Fernández García, Raúl; Sieiro, Javier; López Villegas, José María
    IEEE International Conference on Electronics, Circuits and Systems
    Presentation's date: 2010-12-13
    Presentation of work at congresses

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    This paper addresses the design of high-Q passive inductors and differential transformers in a low-power lownoise amplifier (LNA) application. The passives quality in resonant LC tanks as well as in the matching network and degeneration inductors has been improved by balancing the trade-off between ohmic losses and Eddy current degradation. As a result, the enhanced passives Q-factor for the optimized passive devices has been used in order to design a 2.4 GHz fully integrated high-gain current-reused LNA, implemented in 0.18 μm CMOS technology. The LNA performance show a gain of roughly 30 dB, while dissipating 0.9 mA from a 1.2 V supply.

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    Multiband EMI filter based on metamaterials  Open access

     Gil Galí, Ignacio; Fernández García, Raúl; Gago Barrio, Javier; Balcells Sendra, Josep
    IEICE electronics express
    Date of publication: 2010-05-10
    Journal article

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    A novel compact multiband microstrip EMI filter based on metamaterials is presented. The filter is implemented by means of split-rings resonators and complementary spiral sub-wavelength resonators, conveniently coupled to the victim transmission line. The suitable combination of these resonators allows us to design several stop-band frequency responses located at 900MHz (RFID UHF), 1.8GHz (GSM) and 2.4GHz (ISM) with a significant rejection level. A 3-stages/5-stages rejection band filter has been designed and fabricated in a PCB. The experimental results show a significant rejection level in agreement with the electromagnetic simulations.

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    Low-power current-reused RF front-end based on optimized transformers topology  Open access

     Gil Galí, Ignacio; Cairó, Ignasi; Sieiro, Javier José; López Villegas, José María
    Integration. The VLSI journal
    Date of publication: 2010-04
    Journal article

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    This paper discusses the design, analysis and performance of a 2.4 GHz fully integrated low-power current-reused receiver front-end implemented in 0.18 μm CMOS technology. The front-end is composed of a single-to-differential low-noise amplifier (LNA), using high-Q differential transformers and inductors and a coupled switching mixer stage. The mixer transconductor and LNA share the same DC current. Measurements of performance show a conversion gain of 28.5 dB, noise figure of 6.6 dB, 1 dB compression point of −32.8 dBm and IIP3 of −23.3 dBm at a 250 kHz intermediate frequency, while dissipating 1.45 mA from a 1.2 V supply.

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  • IMPACTO DE LAS RFI EN CIRCUITOS SOMETIDOS A NUEVOS MECANISMOS DE FALLO Y AUMENTO DE SU INMUNIDAD MEDIANTE EL USO DE METAMATERIALES

     Fernández García, Raúl; Berbel Artal, Nestor; Morata Cariñena, Marta; Gil Galí, Ignacio
    Participation in a competitive project

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    Characterization and modelling of switchable stop-band filters based on RF-MEMS and complementary split ring resonators  Open access

     Gil Galí, Ignacio; Morata Cariñena, Marta; Fernández García, Raúl; Rottenberg, Xavier; De Raedt, Walter
    Microelectronic engineering
    Date of publication: 2010-08-13
    Journal article

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    In this work, we present the characterization and electrical modelling of a reconfigurable stop-band filter based on RF microelectromechanical systems (RF-MEMS) combined with metamaterial structures. The device consists of a coplanar waveguide (CPW) structure that combines complementary split ring resonators (CSRRs) and RF-MEMS varactor bridges operating at Q-band. A full electrical model for the description of the proposed structure is presented. The circuit model takes into account the electrical characteristics of the RF-MEMS, CSRRs and transmission line as well as the involved electromagnetic coupling and is used for accurate prediction of switchable filter response.

    Postprint (author’s final draft)

  • Modelling and experimental verification of the impact of negative bias temperature instability on CMOS inverter

     Berbel Artal, Nestor; Fernández García, Raúl; Gil Galí, Ignacio
    Microelectronics reliability
    Date of publication: 2009-11
    Journal article

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  • Diseño de cabezales de RF para aplicaciones wireless de bajo consumo

     Gil Galí, Ignacio
    Jornadas de Conferencias en Ingeniería Electrónica de Terrassa
    Presentation's date: 2009-12-03
    Presentation of work at congresses

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  • Access to the full text
    Reduction of EMI by Combining Interleaving and Modulation Techniques in Multiconverter Topology  Open access

     Mon Gonzalez, Juan; Gago Barrio, Javier; Gonzalez Diez, David; Balcells Sendra, Josep; Fernández García, Raúl; Gil Galí, Ignacio
    Compatibility and Power Electronics
    Presentation of work at congresses

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    In this paper an evaluation of different modulations techniques that combine switching frequency modulation and interleaving is presented. The objective of these modulations is to cancel certain harmonics of EMI and to reduce the amplitude of the remaining harmonics. A four channel parallel buck converter has been used in order to evaluate the modulations proposed. According experimental results, significant reduction of EMI is possible by combining both techniques instead of using them separately.

  • Application of electromagnetic bandgaps to microwave circuit design

     Bonache, Jordi; Falcone, Francisco; Gil Galí, Ignacio; García García, Joan; Martín, Ferran
    Date of publication: 2009-07-31
    Book chapter

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  • Contribution to conducted EMI reduction in multiconverter topology

     Mon Gonzalez, Juan; Gonzalez Diez, David; Gago Barrio, Javier; Balcells Sendra, Josep; Fernández García, Raúl; Gil Galí, Ignacio
    Annual Conference of the IEEE Industrial Electronics Society
    Presentation's date: 2009-11
    Presentation of work at congresses

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  • EPSON Patent Award

     Gil Galí, Ignacio
    Award or recognition

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  • Modelling and experimental verification of the impact of negative bias temperature instability on CMOS inverter

     Berbel Artal, Nestor; Fernández García, Raúl; Gil Galí, Ignacio
    European Symposium on Reliability of Electron Devices, Failure Physics and Analysis
    Presentation's date: 2009-10
    Presentation of work at congresses

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  • Characterization of EMI filters based on metamaterials

     Gil Galí, Ignacio; Fernández García, Raúl; Vives, Yolanda; Jauregui Telleria, Ricardo; Silva Martinez, Fernando
    European Symposium on Electromagnetic Compatibility
    Presentation's date: 2009-06
    Presentation of work at congresses

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  • Low-power RF front-end design for wireless applications

     Gil Galí, Ignacio
    Jornadas de Conferencias en Ingeniería Electrónica de Terrassa
    Presentation's date: 2009-12-03
    Presentation of work at congresses

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  • A new switching frequency modulation scheme for EMI reduction in multiconverter topology

     Mon Gonzalez, Juan; Gago Barrio, Javier; Gonzalez Diez, David; Balcells Sendra, Josep; Fernández García, Raúl; Gil Galí, Ignacio
    European Conference on Power Electronics and Applications
    Presentation's date: 2009-09
    Presentation of work at congresses

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