Now showing items 1-20 of 33

    • A grounded-output 5-switch bipolar buck-boost converter topology for switching power amplifiers 

      García Tormo, Albert; Poveda López, Alberto; Alarcón Cot, Eduardo José; Guinjoan Gispert, Francisco (IEEE, 2011)
      Conference report
      Restricted access - publisher's policy
      This work presents a switching converter topology which can boost and step down the supply voltage and can deliver both positive and negative voltages to a grounded load (bipolar converter topology with non-floating output). ...
    • A study on multi-level PWM and asynchronous Sigma Delta modulations for enhanced bandlimited signal tracking in switching power amplifiers 

      García Tormo, Albert; Poveda López, Alberto; Alarcón Gallo, Eduardo; Guinjoan Gispert, Francisco (2013-06)
      Article
      Restricted access - publisher's policy
      This work deals with multi-level switching amplifiers, in the context of high-efficiency power amplification for signal tracking applications. In particular, this paper evaluates the reduction in the error signal's power ...
    • An enhanced switching policy for buck-derived multi-level switching power amplifiers 

      García Tormo, Albert; Poveda López, Alberto; Alarcón Cot, Eduardo José; Bergveld, Henk Jan; Buter, Berry; Karadi, Ravi (2010)
      Conference report
      Open Access
      This work proposes a switching policy for multi-level fullbridge switching power converters and analyses their performance by driving them with a multi-level PWM modulation, targeting highefficiency power amplifiers. ...
    • Analysis of a bidirecctional coupled-inductor Cuk converter operating in sliding mode 

      Martínez Salamero, Luis; Calvente Calvo, Francisco Javier; Giral, Roberto; Poveda López, Alberto; Fossas Colet, Enric (Institute of Electrical and Electronics Engineers (IEEE), 1998-04-30)
      Article
      Open Access
      Analytic models for a bidirectional coupled-inductor Cuk converter operating in sliding mode are described. Using a linear combination of the converter four state variable errors as a general switching surface, the expression ...
    • Application of Sliding Mode Control to the design of a Buck-based sinusoidal Generator 

      Biel Solé, Domingo; Fossas Colet, Enric; Guinjoan Gispert, Francisco; Alarcón Cot, Eduardo José; Poveda López, Alberto (Institute of Electrical and Electronics Engineers (IEEE), 2001-06)
      Article
      Open Access
      This paper is devoted to the design of a sliding-mode control scheme for a buck-based inverter, with programmable amplitude, frequency, and dc offset, with no external sinusoidal reference required. A general procedure for ...
    • Application of sliding-mode control to the design of a buck-based sinusoidal generator 

      Biel Solé, Domingo; Fossas Colet, Enric; Guinjoan Gispert, Francisco; Alarcón Cot, Eduardo José; Poveda López, Alberto (Institute of Electrical and Electronics Engineers (IEEE), 2001-06)
      Article
      Open Access
      This paper is devoted to the design of a sliding-mode control scheme for a buck-based inverter, with programmable amplitude, frequency, and DC offset, with no external sinusoidal reference required. A general procedure for ...
    • Aspectos comparativos en las estrategias de control de convertidores DC/DC híbridos 

      Martínez García, Herminio; Conesa Roca, Alfons; Alarcón Cot, Eduardo José; Poveda López, Alberto (Universidad de Oviedo, 2006)
      Conference lecture
      Open Access
      Dentro de los convertidores DC/DC híbridos, formados por un regulador lineal en paralelo con un convertidor conmutado, existen diferentes estrategias de control que permiten fijar la frecuencia de conmutación en función ...
    • Bandwidth-enhancement g(m)-C filter with independent omega(O) and Q tuning mechanisms in both topology and control loops 

      Martínez García, Herminio; Vidal López, Eva María; Cantó, Andrea; Poveda López, Alberto; Guinjoan Gispert, Francisco (2010)
      Conference lecture
      Restricted access - publisher's policy
      This paper deals with the proposal of a new topology for a gm-C continuous time filter which allows the adjustment and tuning of its characteristic parameters (ωO and Q) in an independent way (without cross-tuning), thereby ...
    • Bandwidth-Enhancement gm-C Filter with Independent wo and Q Tuning Mechanisms in Both Topology and Control Loops 

      Martínez García, Herminio; Vidal López, Eva María; Poveda López, Alberto; Guinjoan Gispert, Francisco (2010-06)
      Conference report
      Open Access
      This paper deals with the proposal of a new topology for a gm-C continuous time filter which allows the adjustment and tuning of its characteristic parameters (ωO and Q) in an independent way (without cross-tuning), thereby ...
    • Bandwidth-Enhancement gm-C Filter with independent ¿o and Q Tuning Mechanisms in Both Topology and Control Loops 

      Martínez García, Herminio; Vidal López, Eva María; Cantó, Andrea; Poveda López, Alberto; Guinjoan Gispert, Francisco (2010)
      Conference report
      Open Access
      This paper deals with the proposal of a new topology for a gm-C continuous time filter which allows the adjustment and tuning of its characteristic parameters (ωO and Q) in an independent way (without cross-tuning), thereby ...
    • CCII-based analog integrated circuit for sliding-mode control of switching power converters 

      Alarcón Cot, Eduardo José; Romero Castro, Aldo Humberto; Poveda López, Alberto; Porta, S; Martínez Salamero, Luis (2004-02)
      Article
      Restricted access - publisher's policy
      The design and implementation of a CMOS analog integrated circuit that provides versatile sliding-mode control laws for high-frequency switching power converters is described. The controller circuit implements general-purpose ...
    • Chaos controller for switching regulators aiming enhanced design-space towards miniaturization 

      Rodríguez Rodríguez, Enric; El Aroudi, Abdelali; Martínez García, Herminio; Poveda López, Alberto; Alarcón Cot, Eduardo José (Institute of Electronics, Information and Communications Engineers (IEICE), 2014-03-17)
      Article
      Open Access
      This paper tackles the control of fast-scale instabilities in a buck switching power converter aiming to expand its design-space towards miniaturization. After briefly revisiting the working principle of existing chaos ...
    • Chaos controller for switching regulators aiming enhanced design-space towards miniaturization 

      Rodríguez Rodríguez, Enric; El Aroudi, Abdelali; Martínez García, Herminio; Poveda López, Alberto; Iu, H.; Alarcón Cot, Eduardo José (2012)
      Conference report
      Open Access
      This paper tackles the control of fast-scale instabilities in a buck switching power converter aiming to expand its design-space towards miniaturization. After briefly revisiting the working principle of existing chaos ...
    • Chaotic behaviour in on-chip automatic tuning loops for continuous-time filters 

      Martínez García, Herminio; El Aroudi, Abdelali; Alarcón Cot, Eduardo José; Poveda López, Alberto (Universidad Politécnica de Madrid (UPM), 2013)
      Conference lecture
      Open Access
    • Circuito promediador para control de convertidores conmutados de potencia: implemetnación integrada cmos en mod de corriente 

      Villar Piqué, Gerard; Alarcón Cot, Eduardo José; Martínez García, Herminio; Vidal López, Eva María; Poveda López, Alberto (Universidad de Alcalá, 2002)
      Conference lecture
      Open Access
      El presente artículo describe el estudio, la síntesis y la implementación microelectrónica analógica de un método para la obtención del valor medio instantáneo de una señal, en el contexto del control de convertidores ...
    • 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)
      Conference report
      Restricted access - publisher's policy
      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 ...
    • Current-Steering Switching Policy for a SIDO Linear-Assisted Hysteretic DC/DC Converter 

      Martínez García, Herminio; Silva-Martínez, José; Alarcón Cot, Eduardo José; Poveda López, Alberto (Servicio Editorial de la Universidad del País Vasco, 2010)
      Conference lecture
      Open Access
      This paper proposes the use of linear-assisted switching power converters in the context of single-inductor dual-output (SIDO) applications. By combining a DC/DC ripplecontrolled switching power converter with the respective ...
    • Desfasador sintonizable CMOS para aplicaciones de sintonía automática 

      Martínez García, Herminio; Vidal López, Eva María; Alarcón Cot, Eduardo José; Poveda López, Alberto (Comité Organitzador SAAEI, 2001)
      Conference report
      Open Access
      En este artículo se presenta el diseño e implementación de un desfasador con capacidad de sintonía mediante una tensión de control externa, que ofrece un desfase de π/2 a una frecuencia específica de interés. La utilización ...
    • Diseño e implementación de un convertidor DC/DC híbrido 

      Martínez García, Herminio; Conesa Roca, Alfons; Alarcón Cot, Eduardo José; Poveda López, Alberto (Universidad de Oviedo, 2006)
      Conference lecture
      Open Access
      El presente artículo muestra el diseño y realización práctica de una topología mixta o híbrida lineal–conmutada para convertidores de potencia DC/DC, formada por un regulador lineal de tensión y un convertidor conmutado ...
    • Diseño e implementación de un filtro MRC-C con sintonía automática on-chip 

      Martínez García, Herminio; Vidal López, Eva María; Alarcón Cot, Eduardo José; Poveda López, Alberto (Comité Organitzador SAAEI, 2001)
      Conference lecture
      Open Access
      En el presente artículo se describe el diseño e implementación de los lazos de sintonía (tanto del que fija la frecuencia central como del que fija el factor de calidad) de un filtro pasa-banda de tiempo continuo fully-balanced ...