Now showing items 21-39 of 39

    • Digitally programmable MOS resistive circuit 

      Alarcón Cot, Eduardo José; Martínez García, Herminio; Vidal López, Eva María; Poveda López, Alberto (Institution of Electrical Engineers, 2002-01)
      Article
      Restricted access - publisher's policy
      A mixed-signal cell is presented which operates as a digitally-controlled differential resistor and is suited to programmable continuous-time MOSFET-C filter applications. The cell is based on a digitally-controlled extension ...
    • 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 ...
    • Dynamic modeling of tunable analog integrated filters for a stability study of on-chip automatic tuning loops 

      Martínez García, Herminio; Vidal López, Eva María; Alarcón Cot, Eduardo José; Poveda López, Alberto (2009-12)
      Article
      Restricted access - publisher's policy
      Continuous-time filters with automatic tuning loops are nonlinear feedback systems that are potentially unstable. To ensure stability, particularly if the design of the loop controllers is to be improved, the appropriate ...
    • Electronically tunable switch-mode high-efficiency adaptive band-pass filters for energy harvesting applications 

      Gomez Cid-Fuentes, Raül; Martínez García, Herminio; Poveda López, Alberto; Alarcón Cot, Eduardo José (Institute of Electrical and Electronics Engineers (IEEE), 2012)
      Conference report
      Restricted access - publisher's policy
      Wireless Sensor Networks (WSN) present a pending challenge for a complete deployability due to energy requirements. The Self-Powered WSN approach aims to extend the sensor node life by means of Energy Harvesting. The ...
    • Filtro gm-C para aplicaciones de comunicaciones con sintonía adaptativa del factor de calidad Q independiente de la sintonía de la frecuencia central 

      Vidal López, Eva María; Martínez García, Herminio; Poveda López, Alberto (Universidad Carlos III de Madrid (UC3M), 2008)
      Conference report
      Open Access
      Este artículo muestra la propuesta de un filtro gm-C de segundo orden con control independiente total de la frecuencia central y el factor de calidad diseñado para aplicaciones inalámbricas multiestándar. Se presenta ...
    • Filtro Gm-C Para Aplicaciones de Comunicaciones con Sintonía Adaptativa del Factor de Calidad Q Independiente de la Sintonía de la Frecuencia Central 

      Vidal López, Eva María; Cantó, A.; Martínez García, Herminio; Poveda López, Alberto (Universidad Carlos III de Madrid (UC3M), 2008)
      Conference report
      Open Access
    • FPGA-based design of a step-up photovoltaic array emulator for the test of PV grid-connected inverters 

      Chavarría Roé, Javier; Biel Solé, Domingo; Guinjoan Gispert, Francisco; Poveda López, Alberto; Masana Nadal, Francisco; Alarcón Cot, Eduardo José (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Conference report
      Restricted access - publisher's policy
      In this work, a proof of concept prototype for a photovoltaic array emulator based on a DC-DC Boost converter is presented. This design arises from the need to study in the laboratory new PV inverters based on Silicon ...
    • Fundamental modulation limits for minimum switching frequency inband-error-free high-efficiency power amplifiers 

      García Tormo, Albert; Poveda López, Alberto; Alarcón Cot, Eduardo José; Guinjoan Gispert, Francisco (2011)
      Article
      Restricted access - publisher's policy
      This paper explores the modulation bandwidth limits for switching amplifiers, by analyzing the fundamental tracking capabilities of two-level switching signals. With this aim, this work synthesizes two-level switching ...
    • Low cost photovoltaic array emulator design for the test of PV grid-connected inverters 

      Chavarría Roé, Javier; Biel Solé, Domingo; Guinjoan Gispert, Francisco; Poveda López, Alberto; Masana Nadal, Francisco; Alarcón Cot, Eduardo José (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Conference report
      Restricted access - publisher's policy
      This paper presents a low cost photovoltaic array emulator design based on a DC-DC Boost converter. This design arises from the need to study in the laboratory new PV inverters based on SiC devices in order to improve their ...
    • Modelos matemáticos para reguladores conmutados continua-continua con lazo de control de corriente 

      Poveda López, Alberto (Universitat Politècnica de Catalunya, 1988-04-25)
      Doctoral thesis
      Open Access
      Se desarrolla un tratamiento unificado para la síntesis y la modelación de este tipo de reguladores que facilita y sistematiza el diseño de los mismos. Su síntesis permite explicar la existencia de realizaciones ya conocidas ...
    • Multi-level asynchronous Sigma Delta modulators for wideband switching power amplifiers 

      García Tormo, Albert; Poveda López, Alberto; Alarcón Cot, Eduardo José; Guinjoan Gispert, Francisco (IEEE, 2010)
      Conference report
      Restricted access - publisher's policy
      This work extends the Asynchronous ΣΔ Modulator and its Adaptive version to multi-level modulators, targeting wideband high-efficiency switching power amplifiers. The performance of these modulators is compared with the ...
    • On the use of state-feedback in the design of elementary switching regulators 

      Bertran Albertí, Eduardo; Martínez Barrios, Luis; Poveda López, Alberto (Institute of Electrical and Electronics Engineers (IEEE), 1987)
      Conference report
      Open Access
      The dc-to-dc buck switching converter is modelled by means of the State-Space Averaging Method and techniques of Modern Control Theory are applied to obtain a class of state-feedback control laws. Three different strategies ...
    • Output-Capacitorless CMOS LDO Regulator Based on High Slew-Rate Current-Mode Transconductance Amplifier 

      Saberkari, Alireza; Fathipour, Rasoul; Martínez García, Herminio; Poveda López, Alberto; Alarcón Cot, Eduardo José (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Conference lecture
      Open Access
      A low quiescent current output-capacitorless CMOS LDO regulator based on a high slew-rate current-mode transconductance amplifier (CTA) as an error amplifier is presented. Load transient characteristic of the proposed LDO ...
    • Output–Capacitorless CMOS LDO Regulator Based on High Slew–rate current-mode transconductance amplifier 

      Saberkari, Alireza; Fathipour, Rasoul; Martínez García, Herminio; Poveda López, Alberto; Alarcón Cot, Eduardo José (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Conference lecture
      Restricted access - publisher's policy
      A low quiescent current output-capacitorless CMOS LDO regulator based on a high slew-rate current-mode transconductance amplifier (CTA) as an error amplifier is presented. Load transient characteristic of the proposed LDO ...
    • Single-Input Dual-Output (SIDO) Linear-Assisted DC/DC Converter 

      Martínez García, Herminio; Silva-Martínez, José; Conesa Roca, Alfons; Poveda López, Alberto (Universidad Carlos III de Madrid (UC3M), 2008)
      Conference report
      Open Access
    • Single-Input Dual-Output (SIDO) Linear–Assisted DC/DC Converter 

      Martínez García, Herminio; Silva-Martínez, José; Conesa Roca, Alfons; Poveda López, Alberto (Universidad Carlos III de Madrid (UC3M), 2008)
      Conference report
      Open Access
      This article describes a single-input dual output(SIDO) linear-assisted DC/DC converter. Linear-assisted DC/DC converters are structures that allow to take advantages of the two classic alternatives in the design of power ...
    • Sliding mode control of switching converters: general theory in an integrated solution 

      Romero Nevado, Alfonso Jose; Martínez Salamero, Luis; Calvente, J.; Alarcón Cot, Eduardo José; Porta Cuellar, Sonia; Poveda López, Alberto (2005-12)
      Article
      Open Access
      The application of the sliding-mode control theory to the regulation of dc-to-dc switching converters is reviewed. Subsequently, linear dynamical models are derived and compensating networks are designed. An analog integrated ...
    • Towards an on-chip boost switching power converter: a design space exploration 

      Villar Piqué, Gerard; Alarcón Cot, Eduardo José; Guinjoan Gispert, Francisco; Poveda López, Alberto (2005-12)
      Article
      Open Access
      This work presents the design space exploration of a boost switching power converter focused on its monolithic implementation. An analysis in terms of the models of its main circuit elements (switching transistors, inductor, ...