Now showing items 1-18 of 18

    • Design an implementation of a Class D Amplifier 

      Santana Ruiz, Sergio (Universitat Politècnica de Catalunya, 2016-06-30)
      Bachelor thesis
      Restricted access - author's decision
      This Project born at early 2016 when I talked with Nestor Berbel to ask him to be my tutor in my bachelor thesis. My idea was to implement an audio amplifier because I would like to understand how it works on low level. ...
    • Design and linearization of an efficient class E power amplifier using a test bench based on development boards 

      Flomenbaum, Julieta (Universitat Politècnica de Catalunya, 2017-02-14)
      Master thesis
      Open Access
      Covenantee:   Universidad de Cantabria
      Nowadays, with the increase in small satellites applications for Earth observation, the need for high efficient transmitters capable of delivering the required power, taking into account not only the power consumption ...
    • Development of a reference signal source to verify electromagnetic emissions test benches 

      Tamborero Albà, Arnau (Universitat Politècnica de Catalunya, 2020-08)
      Bachelor thesis
      Open Access
      Electromagnetic Compatibility (EMC) laboratories must ensure the quality of the tests they perform. In this regard, periodic calibrations and internal verifications should be carried out systematically to provide evidence ...
    • Disseny d'amplificador d'àudio DCI-NPC de 5 nivells i estudi d'errors en el modulador 

      Resano Inza, Tomás (Universitat Politècnica de Catalunya, 2012-06-28)
      Master thesis (pre-Bologna period)
      Open Access
      [ANGLÈS] Implementation of a prototype and modellating of the errors in the modulator.
    • Disseny d’un amplificador d’àudio basat en inversor amb topologia DCI-NPC multinivell 

      Ruiz Illana, Germán (Universitat Politècnica de Catalunya, 2008)
      Master thesis
      Restricted access - author's decision
      Un amplificador de tres nivells proporciona una sèrie d’avantatges: la tensió a suportar per els interruptors es redueix a la meitat en relació a un disseny de dos nivells. Per tant, podem obtenir dos avantatges contraposats: ...
    • Disseny òptim d'amplificadors d'audio commutats DCI-NPC d'alta potència i qualitat 

      Sala Caselles, Vicenç (Universitat Politècnica de Catalunya, 2014-12-12)
      Doctoral thesis
      Open Access
      Class-D Amplification has been an absolute improvement in terms of electrical efficiency in audio amplification systems, but it has been during the first stabilization decade of this technology in the market when manufacturers ...
    • Dynamic selection and update of digital predistorter coefficients for power amplifier linearization 

      Pham, Thi Quynh Anh; López Bueno, David; Montoro López, Gabriel; Gilabert Pinal, Pere Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Conference lecture
      Restricted access - publisher's policy
      In this paper, a new method for dynamically estimating and updating the coefficients of a digital predistortion (DPD) linearizer is presented. By means of the partial least squares (PLS) algorithm, the basis matrix used ...
    • Equalizer and amplifier 

      Subirana, Jordi (2005)
      Master thesis (pre-Bologna period)
      Restricted access - author's decision
      Covenantee:   Cork Institute of Technology
    • Estudi d'implementació d'una estructura per a millorar la directivitat d'un altaveu 

      Vicente Ballesteros, Álvaro (Universitat Politècnica de Catalunya, 2015-06-12)
      Bachelor thesis
      Restricted access - author's decision
      Sovint, algunes aplicacions en el món del àudio requereixen d’altaveus amb alta directivitat. Avui en dia, però, els altaveus comuns no presenten un comportament directiu per a freqüències baixes. En el present estudi es ...
    • Evaluation of digital linearization techniques for PAs under 5G waveform operation in spectrum sharing scenarios 

      Cañal Blanco, Mireia; Mars Perez, Aitor (Universitat Politècnica de Catalunya, 2016-09-15)
      Bachelor thesis
      Open Access
      This project has been oriented to improve the efficiency and the linearization of power amplifiers (PA) with the combination of crest factor reduction (CFR) techniques and digital predistortion techniques (DPD). These ...
    • Low-power current-reused RF front-end based on optimized transformers topology 

      Gil Galí, Ignacio; Cairó, Ignasi; Sieiro, Javier José; López-Villegas, José María (2009-10-09)
      Article
      Open Access
      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-power RF front-end design for wireless applications 

      Gil Galí, Ignacio (2010-02-11)
      Conference lecture
      Restricted access - publisher's policy
    • Model order reduction techniques for power amplifier digital predistortion linearization 

      Mozos Ruiz, José Miguel (Universitat Politècnica de Catalunya, 2016-07-25)
      Bachelor thesis
      Open Access
      To address the known trade-off between linearity and efficiency of the PA, several linearization techniques have been proposed in the literature. Among them, the most widespread technique is now digital predistortion (DPD) ...
    • Optimized passive devices for low-power LNA design 

      Gil Galí, Ignacio; Fernández García, Raúl; Sieiro, Javier; López-Villegas, José María (2010)
      Conference report
      Open Access
      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 ...
    • Planck-LFI 44-GHz back end module 

      Aja, Beatriz; Pascual, Juan Pablo; Fuente, Luisa de la; Detratti, M.; Artal Latorre, Eduardo; Mediavilla, Asier; Paco Sánchez, Pedro Antonio de; Pradell i Cara, Lluís (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-10-31)
      Article
      Open Access
      This work describes the principle of operation, assembly and performance of one branch of the 44 GHz back end module (BEM) for the Planck low frequency instrument (LFI). This subsystem constitutes a fully representative ...
    • Provisión de servicios de acceso de banda ancha a internet/intranet para ubicaciones de difícil cobertura 

      Mas Ortoneda, Joan Marc (Universitat Politècnica de Catalunya, 2016-05)
      Master thesis (pre-Bologna period)
      Restricted access - author's decision
      The objective of this work was to design and ultimately provide a two-way universal broadband connectivity service for a national Spanish public entity and all its regional branches where IP traffic could be routed end-to-end ...
    • Rejection of periodic disturbances using MRAC with minimal controller synthesis 

      Larco Barros, Ciro Mauricio; Olm Miras, Josep Maria; Costa Castelló, Ramon (2016)
      Conference report
      Restricted access - publisher's policy
      The tracking/rejection of periodic disturbances in linear systems is achievable via internal model principle-based techniques, such as repetitive control. However, when the frequency of the signal to track/reject is uncertain ...
    • X-band UAV-SAR optimization and validation 

      Royo, Miquel (Universitat Politècnica de Catalunya, 2018-07)
      Bachelor thesis
      Open Access
      This project consists on the improvement of an already validated System, as it is the work of a finished PhD Thesis. Due to the wide range of that thesis, many sub blocs need to be revaluated and optimized. That is the ...