Now showing items 1-20 of 21

    • A BPSK superregenerative receiver. Preliminary results 

      Palà Schönwälder, Pere; Moncunill Geniz, Francesc Xavier; Bonet Dalmau, Jordi; Águila López, Francisco del; Giralt Mas, Ma. Rosa (IEEE Press. Institute of Electrical and Electronics Engineers, 2009-05)
      Conference report
      Open Access
      This paper describes a bit-synchronous superregenerative receiver suitable for BPSK demodulation. The output of the superregenerative oscillator (SRO), which reproduces the phase information of the input signal, is ...
    • 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
      Open Access
      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 high-resolution UWB IR superregenerative receiver front end with an SRD quench shaper 

      Moncunill Geniz, Francesc Xavier; Bonet Dalmau, Jordi; Palà Schönwälder, Pere; Águila López, Francisco del; Giralt Mas, Ma. Rosa (2012-02-03)
      Article
      Restricted access - publisher's policy
      We present a simple receiver front end that makes use of the baseband superregeneration principle to detect ultrawideband (UWB) impulse radio signals. The UWB antenna is directly connected to the core circuit consisting ...
    • A low in-band radiation superregenerative oscillator 

      Palà Schönwälder, Pere; Bonet Dalmau, Jordi; Moncunill Geniz, Francesc Xavier; Águila López, Francisco del; Giralt Mas, Ma. Rosa (2013-05-27)
      Article
      Open Access
      This brief describes a superregenerative (SR) voltage-controlled oscillator as a building block for SR receivers where most of the oscillator spectrum components are outside the reception frequency band. This allows ...
    • Creació de materials docents per assignatures de telecomunicacions amb eines informàtiques de fàcil utilització 

      Giralt Mas, Ma. Rosa; Águila López, Francisco del (Universitat de Barcelona. Edicions i Publicacions, 2006)
      Conference report
      Open Access
      Seguint l’enfocament de l’Espai Europeu d’Educació Superior (EEES), on es valora l’aprenentatge cooperatiu i basat en projectes, es troba interessant disposar de materials docents, per al treball individual o col·lectiu, ...
    • Eines de la web 2.0 per a la coordinació d'assignatures i el treball en equip 

      Bonet Dalmau, Jordi; Águila López, Francisco del; Escobet Canal, Teresa; Giménez Pradales, José Miguel; Giralt Mas, Ma. Rosa; Palà Schönwälder, Pere; Sanahuja Moliner, Ricard; Vila Marta, Sebastià (Universitat Politècnica de Catalunya. Institut de Ciències de l'Educació, 2013-02-08)
      Conference report / Conference lecture
      Open Access
      Aquest projecte té per objectiu millorar l'eficiència en l'aprenentatge introduint la web 2.0 com a eina quotidiana de coordinació del PDI i de treball en equip de l'alumnat. La part més important del projecte consisteix ...
    • Eines de la web 2.0 per a la coordinació d'assignatures: resultats preliminars 

      Giralt Mas, Ma. Rosa; Bonet Dalmau, Jordi; Vila Marta, Sebastià; Palà Schönwälder, Pere; Águila López, Francisco del (2012)
      Conference lecture
      Open Access
      Aquesta comunicació presenta els resultats d'utilització d'un Dipòsit de Material Docent amb les característiques pròpies de l'Open Course Ware, en el primer quadrimestre del nou grau en Enginyeria de Sistemes TIC que ...
    • Forward backward asymmetries of lepton pairs in events with a large transverse momentum jet at hadron colliders 

      Águila López, Francisco del; Ametller Congost, Lluís; Talavera Sánchez, Pedro (2002-10)
      Article
      Open Access
      We discuss forward-backward charge asymmetries for lepton-pair production in association with a large-transverse-momentum jet at hadron colliders. The lepton charge asymmetry relative to the jet direction AjFB gives a new ...
    • Integració de l'anglès en el nou grau en enginyeria de sistemes TIC 

      Giralt Mas, Ma. Rosa; Palà Schönwälder, Pere; Bonet Dalmau, Jordi; Águila López, Francisco del; Vila Marta, Sebastià; Sanahuja, R. (Universitat Politècnica de Catalunya. Institut de Ciències de l'Educació, 2012-07-06)
      Conference report
      Open Access
      Des de l’entrada en vigor de l’EEES que cal treballar i avaluar les competències genèriques. Una d’elles és la tercera llengua, i a totes les escoles, en les assignatures, majoritàriament es treballa l’anglès. En el nou ...
    • Integració de la competència de la tercera llengua (anglès) en els estudis de grau 

      Alsina Aubach, Montserrat; Argelaguet Isanta, María Rosa; Bonet Dalmau, Jordi; Heras Cisa, F. Xavier de las; Águila López, Francisco del; Fortuny Santos, Jordi; Franch Parella, Jorge; Gamisans Noguera, Javier; Giralt Mas, Ma. Rosa; Lao Luque, Concepción; López Martínez, Joan Antoni; Martínez Teixidor, Inmaculada; Palà Schönwälder, Pere; Parcerisa Duocastella, David; Vicente Rodrigo, Jesús; Vila Marta, Sebastià (Universitat Politècnica de Catalunya. Institut de Ciències de l'Educació, 2013-02-08)
      Conference lecture / Conference report
      Open Access
      La finalitat del projecte ha estat la integració de la competència de la tercera llengua en els estudis de grau, des del convenciment que ens cal formar professionals tecnològics multilingües, que és el que ens ha ...
    • Joint symbol and chip synchronization for a burst-mode-communication superregenerative MSK receiver 

      López Riera, Alexis; Águila López, Francisco del; Palà Schönwälder, Pere; Bonet Dalmau, Jordi; Giralt Mas, Ma. Rosa; Moncunill Geniz, Francesc Xavier (2017-01-05)
      Article
      Open Access
      In this paper we describe a superregenerative (SR) MSK receiver able to operate in a burst-mode framework where synchronization is required for each packet. The receiver is based on an SR oscillator which provides samples ...
    • A proof-of-concept superregenerative QPSK transceiver 

      López Riera, Alexis; Palà Schönwälder, Pere; Bonet Dalmau, Jordi; Moncunill Geniz, Francesc Xavier; Águila López, Francisco del; Giralt Mas, Ma. Rosa (2014)
      Conference lecture
      Open Access
      In this paper we present a description and experimental verification of an HF-band proof-of-concept superregenerative transceiver for QPSK signals. We describe a simple implementation of an all-digital, FPGA-based, QPSK ...
    • Signal and noise power spectra in superregenerative oscillators 

      Bonet Dalmau, Jordi; Palà Schönwälder, Pere; Moncunill Geniz, Francesc Xavier; Águila López, Francisco del; Giralt Mas, Ma. Rosa (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Conference lecture
      Restricted access - publisher's policy
      This paper presents a method to quantify noise in superregenerative oscillators. A frequency domain technique, originally intended to determine the signal response, can also be used to determine the noise response. This ...
    • Steady state analysis of Chua's circuit with RLCG transmission line 

      Bonet Dalmau, Jordi; Palà Schönwälder, Pere; Águila López, Francisco del (Institute of Electrical and Electronics Engineers (IEEE), 1999)
      Conference report
      Open Access
      In this paper we present a new technique to compute the steady state response of nonlinear autonomous circuits with RLCG transmission lines. Using multipoint Pade approximants, instead of the commonly used expansions around ...
    • Steady state analysis of class-E amplifier with non-linear capacitor by means of discrete-time techniques 

      Águila López, Francisco del; Palà Schönwälder, Pere; Bonet Dalmau, Jordi; Giralt Mas, Ma. Rosa (The Institute of Electrical and Electronics Engineers, 2000)
      Conference report
      Open Access
      A new method to determine the steady state response of switched nonlinear circuits is proposed. The method is based on a Gear discretization of the circuit equations. Additional samples of the waveform are used to describe ...
    • Sub-nanosecond pulse filtering and amplification through firts-order controlled circuit instability 

      Moncunill Geniz, Francesc Xavier; Palà Schönwälder, Pere; Bonet Dalmau, Jordi; Águila López, Francisco del; Giralt Mas, Ma. Rosa (2009)
      Conference lecture
      Open Access
      In this paper we investigate how to use controlled circuit instability in the filtering and amplification of narrow pulses. The basic circuit consists of a first-order RC network coupled to a negative resistance controlled ...
    • Superregeneration revisited: from principles to current applications 

      Palà Schönwälder, Pere; Bonet Dalmau, Jordi; Águila López, Francisco del; Moncunill Geniz, Francesc Xavier; Giralt Mas, Ma. Rosa (2020-02-01)
      Article
      Open Access
      Wireless communications play a central role in our modern connected lives; at the same time, they constitute a very broad and deep area of research. The elements that make wireless communications possible are a transmitter, ...
    • A superregenerative QPSK receiver 

      Palà Schönwälder, Pere; Bonet Dalmau, Jordi; Moncunill Geniz, Francesc Xavier; Águila López, Francisco del; Giralt Mas, Ma. Rosa (2014-01)
      Article
      Open Access
      In this paper we present a description and experimental verification of a superregenerative receiver (SR) for QPSK signals. Exploiting the fact that a conventional SR generates pulses which preserve the input phase ...
    • Superregenerative reception of narrowband FSK modulations 

      Palà Schönwälder, Pere; Bonet Dalmau, Jordi; López Riera, Alexis; Moncunill Geniz, Francesc Xavier; Águila López, Francisco del; Giralt Mas, Ma. Rosa (2015-03-01)
      Article
      Open Access
      In this paper we investigate the possibilities of narrowband FSK detection using a superregenerative (SR) receiver. Previous SR FM demodulation techniques rely on detecting the amplitude variations caused by the different ...
    • The nonlinear class-E amplifier: a case study of harmonic balance applied to switched circuits 

      Bonet Dalmau, Jordi; Águila López, Francisco del; Moncunill Geniz, Francesc Xavier; Palà Schönwälder, Pere (IEEE Press. Institute of Electrical and Electronics Engineers, 2009-05)
      Conference report
      Open Access
      Nonlinear switched circuits are usually analyzed in the time domain. The use of frequency-domain methods to analyze the steady-state of switched circuits is usually restricted to linear circuits and, although Volterra ...