Ara es mostren els items 1-20 de 22

    • A discrete-time technique for the steady-state analysis of nonlinear class-E amplifiers 

      Águila López, Francisco del; Palà Schönwälder, Pere; Molina Gaudó, Pilar; Mediano Heredia, Arturo (Institute of Electrical and Electronics Engineers (IEEE), 2007-06-11)
      Article
      Accés obert
      Switched circuits are widely used, particularly for power electronic applications in which efficiency is important. Of these applications, the class-E amplifier has been given particular attention, since it is theoretically ...
    • A RF-MEMS switchable CPW air-bridge 

      Contreras, Adrián; Casals Terré, Jasmina; Pradell i Cara, Lluís; Giacomozzi, Flavio; Colpo, Sabrina; Iannacci, Jacopo; Ribó, Miquel (2012)
      Comunicació de congrés
      Accés obert
      This work presents a new shunt-type ohmic contact RF-MEMS switch specifically designed as a switchable CPW air bridge. The switch can be used in coplanar waveguide (CPW) reconfigurable multimodal circuits, for a selective ...
    • Actuator multiplicative fault estimation in discrete-time LPV systems using switched observers 

      Rotondo, Damiano; López Estrada, Francisco Ronay; Nejjari Akhi-Elarab, Fatiha; Ponsart, J. C.; Theilliol, Didier; Puig Cayuela, Vicenç (2016-09-01)
      Article
      Accés obert
      This paper proposes an observer for the joint state and fault estimation devoted to discrete-time linear parameter varying (LPV) systems subject to actuator faults. The major contribution of this work is that the observer ...
    • An active power synchronizing controller for grid-connected power converters with configurable natural droop characteristics 

      Zhang, Weiyi; Luna Alloza, Álvaro; Candela García, José Ignacio; Rocabert Delgado, Joan; Rodríguez Cortés, Pedro (2015)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Improving the dynamics of the widely applied gridconnected power converters has been drawing a lot of interests in recent years. Since the currently installed grid-connected converters doesn’t shown inertia effect in power ...
    • Analysis of a voltage balancing technique with reduced switching transitions in a flying capacitor multilevel converter 

      Ghias, Amer M.Y.M.; Pou Félix, Josep; Agelidis, Vassilios; Ciobotaru, M. (2013)
      Text en actes de congrés
      Accés obert
      This paper reports the analysis of a voltage balancing technique based on optimal switching transitions for a flying capacitor (FC) multilevel converter using phase disposition pulse-width modulation. Since multiple switching ...
    • Compact formulation for exact analysis of nonideal SC circuits 

      Sanz Postils, Margarita; Puerta Notario, Antonio (Institution of Electrical Engineers, 1987-05)
      Article
      Accés restringit per política de l'editorial
      A systematic analysis procedure to obtain closed-form expressions for the z-domain transfer functions of SC circuits with finite GB product op-amps is presented. This method allows exact frequential analysis of a general ...
    • Continuous-time CMOS adaptive asynchronous sigma-delta modulator approximating low-fs low-inband-error on-chip wideband power amplifier 

      Alarcón Cot, Eduardo José; Fernández, Diego; García Tormo, Albert; Madrenas Boadas, Jordi; Poveda López, Alberto (IEEE, 2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      A mixed-signal continuous-time-processing standard CMOS implementation of an asynchronous sigma-delta modulator aimed to drive a switching amplifier operating as an on-chip wideband adaptive power supply is presented in ...
    • Disseny d’un modulador per a un amplificador commutat d’àudio 

      Oliveras Cejas, Pau Jordan (Universitat Politècnica de Catalunya, 2021-07-01)
      Treball Final de Grau
      Accés restringit per decisió de l'autor
      Aquest treball consisteix en l’estudi, el disseny i la implementació d’un prototip d’amplifi- cador d’àudio commutat. En termes generals, els principals subsistemes d’un amplificador commutat són la font d’alimentació, ...
    • Division with speculation of quotient digits 

      Cortadella, Jordi; Lang, Tomás (Institute of Electrical and Electronics Engineers (IEEE), 1993)
      Text en actes de congrés
      Accés obert
      The speed of SRT-type dividers is mainly determined by the complexity of the quotient-digit selection, so that implementations are limited to low-radix stages. A scheme is presented in which the quotient-digit is speculated ...
    • Generalized PWM-based method for multiphase neutral-point-clamped converters with capacitor voltage balance capability 

      López, Iraide; Ceballos Recio, Salvador; Pou, Josep; Zaragoza Bertomeu, Jordi; Andreu, Jon; Ibarra Basabe, Edorta; Konstantinou, Georgios (2017-06-12)
      Article
      Accés obert
      This paper presents a generalized pulse width modulation (PWM)-based control algorithm for multiphase neutral-point-clamped (NPC) converters. The proposed algorithm provides a zero sequence to be added to the reference ...
    • Maximum tolerance and maximum greatest tolerance 

      Freixas Bosch, Josep; Molinero Albareda, Xavier (2009-09-23)
      Report de recerca
      Accés obert
      An important consideration when applying neural networks is the sensitivity to weights and threshold in strict separating systems representing a linearly separable function. Two parameters have been introduced to ...
    • Neutral-point current modeling and control for neutral-point clamped three-level converter drive with small DC-link capacitor 

      Maheshwari, RamKrishan; Munk-Nielsen, Stig; Busquets Monge, Sergio (IEEE Press. Institute of Electrical and Electronics Engineers, 2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      A Neutral-Point-Clamped (NPC) three-level inverter with small DC-link capacitors is presented in this paper. This inverter requires zero average neutral-point current for stable neutral-point potential. A simple ...
    • Novel slow–fast behaviour in an oscillator driven by a frequency-switching force 

      Bonet Revés, Carles; Jeffrey, Mike R.; Martín de la Torre, Pablo; Olm Miras, Josep Maria (2023-04)
      Article
      Accés obert
      When an oscillator switches abruptly between different frequencies, there is some ambiguity in deciding how the system should be modelled at the switch. Here we describe two seemingly natural models of a switch in a simple ...
    • Probabilistic resistive switching device modeling based on Markov jump processes 

      Ntinas, Vasileios; Rubio Sola, Jose Antonio; Sirakoulis, Georgios (Institute of Electrical and Electronics Engineers (IEEE), 2020-12-02)
      Article
      Accés obert
      In this work, a versatile mathematical framework for multi-state probabilistic modeling of Resistive Switching (RS) devices is proposed for the first time. The mathematical formulation of memristor and Markov jump processes ...
    • Puesta en marcha de un interruptor bidireccional de potencia con Mosfet 

      Ruiz Vives, Albert (Universitat Politècnica de Catalunya, 2010)
      Projecte/Treball Final de Carrera
      Accés obert
      El proyecto desarrollado consiste en poner en marcha un interruptor bidireccional de potencia que permita conmutar entre dos entradas de potencia sobre una salida, de manera que la corriente no sufra ningún tipo de ...
    • Reconfigurable multimodal bandpass filter based on RF-MEMS switchable CPW air-bridges 

      Contreras Bleda, Adrián; Casals Terré, Jasmina; Pradell i Cara, Lluís; Giacomozzi, Flavio; Iannacci, Jacopo; Ribó i Pal, Miquel (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In this paper, a uniplanar RF-MEMS secondorder bandpass filter with reconfigurable centre frequency is presented. It is based on quarter-wavelength slotline resonators and CPW-slotline multimodal immittance inverters (MIIs), ...
    • Secuenciador de conmutación para motores de SRM mediante EPROM 

      Ginés Ramos, Andrés (Universitat Politècnica de Catalunya, 2009-07)
      Projecte/Treball Final de Carrera
      Accés obert
      Este proyecto pretende hacer un estudio de un secuenciador para la conmutación de un motor SRM mediante diferentes lógicas de programación mediante una Eprom. Primero, se ha realizado una breve introducción histórica, ...
    • Study and comparison of discontinuous modulation for modular multilevel converters in motor drive applications 

      Picas Prat, Ricard; Zaragoza Bertomeu, Jordi; Pou Félix, Josep; Ceballos Recio, Salvador; Konstantinou, Georgios; Capellá Frau, Gabriel José (Institute of Electrical and Electronics Engineers (IEEE), 2019-01-01)
      Article
      Accés obert
      Discontinuous modulation applied to modular multilevel converters is an effective method for reducing the capacitor voltage ripples. In this paper, the discontinuous modulation is adapted and used in a motor drive application. ...
    • Study of modulation techniques applied to full bridge single-phase inverters based on wide-bandgap semiconductors 

      Ferrer Arnau, Luis Jorge; Berbel Artal, Néstor; Capellá Frau, Gabriel José; Zaragoza Bertomeu, Jordi (2019)
      Comunicació de congrés
      Accés obert
      Wide-band gap (WBG) devices are gradually replacing standard Si semiconductors in power converters. This is due to the fact that WBG devices exhibit lower capacitance and on-resistance and besides, as they can switch at ...
    • Submodule power losses balancing algorithms for the modular multilevel converter 

      Picas Prat, Ricard; Pou, Josep; Zaragoza Bertomeu, Jordi; Watson, Alan; Konstantinou, Georgios; Ceballos Recio, Salvador; Clare, John (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Text en actes de congrés
      Accés obert
      Tolerance and component aging can cause significant differences in the capacitance values of the submodules (SMs) in a modular multilevel converter (MMC). Depending on the modulation technique, capacitance mismatches may ...