Now showing items 1-20 of 118

    • 3-D distributed memory polynomial behavioral model for concurrent dual-band envelope tracking power amplifier linearization 

      Gilabert Pinal, Pere Lluís; Montoro López, Gabriel (IEEE Microwave Theory and Techniques Society, 2015-02-01)
      Article
      Open Access
      This paper presents a new 3-D behavioral model to compensate for the nonlinear distortion arising in concurrent dual-band (DB) Envelope Tracking (ET) Power Amplifiers (PAs). The advantage of the proposed 3-D distributed ...
    • 3D digital predistortion for dual-band envelope tracking power amplifiers 

      Gilabert Pinal, Pere Lluís; Montoro López, Gabriel; López Bueno, David; García García, José Ángel (2013)
      Conference lecture
      Restricted access - publisher's policy
      This paper proposes a novel three-dimensional digital predistorter (3D-DPD) suitable for compensating nonlinear distortion in dual-band (DB) envelope tracking (ET) power amplifiers (PAs). By taking into account the ...
    • A 2.4 GHz CMOS class-F power amplifier with reconfigurable load-impedance matching 

      Gilasgar, Mitra; Barlabe Dalmau, Antoni; Pradell i Cara, Lluís (2019)
      Article
      Open Access
    • A class of stable nonlinear systems for modelling memory effects in RF power amplifiers 

      Montoro López, Gabriel; Gilabert Pinal, Pere Lluís; Berenguer Sau, Jordi; Bertran Albertí, Eduardo (Escuela Politécnica Superior Ingeniería Gijón, 2006)
      Conference report
      Open Access
    • A doherty power amplifier based on a tapered line impedance inverter 

      Mehran, Yahyavi; Bertran Albertí, Eduardo (2014)
      Conference report
      Restricted access - publisher's policy
      This paper presents a wideband GaN Doherty power amplifier (DPA) in the 2.6 GHz band with a 3 stages Wilkinson splitter where the impedance inverter is based on a tapered line instead of a quarter wave transformer. From ...
    • A dual-band outphasing transmitter using broadband class E power amplifiers 

      Ruiz, Maria Nieves; Marante, Reinel; Rizo, Leysi; García, José Angel; Gilabert Pinal, Pere Lluís; Montoro López, Gabriel (2014)
      Conference report
      Restricted access - publisher's policy
      In this paper, a dual-band outphasing transmitter (able of operating either at 770 MHz or 960 MHz frequency bands) is presented. Two broadband RF power amplifiers (PAs) have been designed over packaged GaN HEMT devices, ...
    • A full FPGA-based implementation of an adaptive digital predistorter 

      Gilabert Pinal, Pere Lluís; Montoro López, Gabriel; Bertran Albertí, Eduardo (University California San Diego, 2009)
      Conference report
      Open Access
    • A low-complexity memoryless model for envelope tracking RF power amplifiers 

      Montoro López, Gabriel; Gilabert Pinal, Pere Lluís; García García, José Ángel; Ruiz Lavin, Maria de las nieves; Marante, Reinel (European Microwave Association (EuMA), 2014)
      Conference report
      Restricted access - publisher's policy
      This paper presents a new kind of behavioral model structure for characterizing static nonlinearities in dynamically supplied RF power amplifiers. The proposed architecture is based on the combination of several basic cells ...
    • A novel fully differential biopotential amplifier with DC suppression 

      Spinelli, Enrique M.; Martínez, Nolberto; Mayosky, Miguel Ángel; Pallàs Areny, Ramon (Institute of Electrical and Electronics Engineers, 2004-08)
      Article
      Open Access
      Fully differential amplifiers yield large differential gains and also high common mode rejection ratio (CMRR), provided they do not include any unmatched grounded component. In biopotential measurements, however, the ...
    • 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 ...
    • A very low distortion high efficiency class-F power amplifier at 900 MHz. 

      Gilasgar, Mitra; Barlabe Dalmau, Antoni; Pradell i Cara, Lluís (2013)
      Conference report
      Open Access
      This paper presents a novel class - F power amplifier for mobile applications in which with a proper harmonic tuning structure the need f or an extra fil tering section is eliminated . A class - F ...
    • A wideband Doherty-like architecture using a Klopfenstein taper for load modulation 

      Bertran Albertí, Eduardo; Mehran, Yahyavi (2015-11-02)
      Article
      Open Access
      A novel Doherty-like power amplifier (DPA) has been fabricated using 15 W, 2.7 GHz, GaN HEMT transistors. The quarter-wave transformer used in the classical DPA topology is replaced by a matching network including a ...
    • Active control based on an estimator for the bus-pumping cancellation in the half-bridge class-d audio power amplifiers 

      Sala Caselles, Vicenç; Romeral Martínez, José Luis (2011)
      Conference report
      Restricted access - publisher's policy
      In this paper is presented a new technique to avoid the distortion generated due to mid point voltage variations on DC-Bus of Class-D Half Bridge audio amplifiers. An usual distortion source on Class-D amplifier is the ...
    • Adaptive envelope shaping for low and medium power amplifiers with dynamic supply 

      Gilabert Pinal, Pere Lluís; Montoro López, Gabriel; Ruiz Lavin, Maria de las Nieves; García Antón, José A. (2016-07-01)
      Article
      Open Access
      This letter presents an adaptive envelope shaping (AES) method to linearize low and medium power amplifiers (PAs) with dynamic supply. This straightforward linearization solution results very useful for small cell or handset ...
    • Adaptive principal component analysis for online reduced order parameter extraction in PA behavioral modeling and DPD linearization 

      Pham, Thi Quynh Anh; López Bueno, David; Montoro López, Gabriel; Gilabert Pinal, Pere Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Conference report
      Restricted access - publisher's policy
      This paper presents a new method, based on the adaptive principal component analysis (APCA) technique, that iteratively creates and updates an orthogonal data matrix used to estimate the parameters of power amplifier (PA) ...
    • Advanced design features of Doherty power amplifiers 

      Bertran Albertí, Eduardo; Gilabert Pinal, Pere Lluís; Berenguer Sau, Jordi (Unión Científica Internacional de Radio, 2012)
      Conference report
      Open Access
      A Doherty power amplifier (DPA) is an effective structure born in 1936 which, after a scarce revival around year 2000), had been strengthened from 2005 because its capability to combine linear amplification with power ...
    • Aging in CMOS RF linear power amplifiers: experimental comparison and modeling 

      Aragonès Cervera, Xavier; Mateo Peña, Diego; Barajas Ojeda, Enrique; Crespo-Yepes, A.; Rodríguez Martínez, Rosana; Martin Martínez, Javier; Nafría Maqueda, Montserrat (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Conference report
      Restricted access - publisher's policy
      This paper characterizes experimentally the aging degradation experienced by two different 2.45 GHz power amplifier circuits of similar performance, implemented in a 65 nm CMOS technology. Results demonstrate the importance ...
    • Amping up, saving power 

      López Bueno, David; Wang, Teng; Gilabert Pinal, Pere Lluís; Montoro López, Gabriel (2016-01-01)
      Article
      Open Access
      Fourth-generation (4G) communication systems based on orthogonal frequency division multiplexing (OFDM) and the proposed backwards compatible fifth-generation (5G) variants, like filter-bank multicarrier (FBMC), are based ...
    • Amplificació de potència per àudio: una introducció simplificada 

      Mas Casals, Orestes Miquel; Sanz Postils, Margarita; Moncunill Geniz, Francesc Xavier (Universitat Politècnica de Catalunya, 2017-05)
      Lecture notes
      Open Access
    • Amplificador Clase E para la Banda ISM 

      De Joz Rodriguez, Carlos Francisc (Universitat Politècnica de Catalunya, 2010-07-23)
      Bachelor thesis
      Open Access
      Es tracta de dissenyar un amplificador de RF classe E que treballi a 900 Mhz, utilitzant un transistor MOS. S'ha de dissenyar l'amplificador, escollir el transistor, dissenyar les xarxes d'accès, les xarxes d'adaptació, ...