Now showing items 1-20 of 5720

    • ±0.25 V Class-AB CMOS capacitance multiplier and precision rectifiers 

      Pourashraf, Shirin; Ramírez-Angulo, Jaime; Hinojo Montero, José María; González Carvajal, Ramón; López Martín, Antonio Upna Orcid (IEEE, 2019)   Artículo / Artikulua  OpenAccess
      Reduction of minimum supply requirements is a crucial aspect to decrease the power consumption in VLSI systems. A high performance capacitance multiplier able to operate with supplies as low as ±0.25 V is presented. It is ...
    • ±0.3v bulk-driven fully differential buffer with high figures of merit 

      Gangineni, Manaswini; Ramírez-Angulo, Jaime; Vázquez-Leal, Héctor; Huerta-Chua, Jesús; López Martín, Antonio Upna Orcid; González Carvajal, Ramón (MDPI, 2022)   Artículo / Artikulua  OpenAccess
      A high performance bulk-driven rail-to-rail fully differential buffer operating from ±0.3V supplies in 180 nm CMOS technology is reported. It has a differential–difference input stage and common mode feedback circuits ...
    • 0.6-V 1.65-uW second-order Gm-C bandpass filter for multi-frequency bioimpedance analysis based on a bootstrapped bulk-driven voltage buffer 

      Carrillo, Juan M.; Cruz Blas, Carlos Aristóteles de la Upna Orcid (MDPI, 2022)   Artículo / Artikulua  OpenAccess
      A bootstrapping technique used to increase the intrinsic voltage gain of a bulk-driven MOS transistor is described in this paper. The proposed circuit incorporates a capacitor and a cutoff transistor to be connected to ...
    • A 1.2-V current-mode RMS-to-DC converter based on a novel two-quadrant electronically simulated MOS translinear loop 

      Martincorena Arraiza, Maite Upna Orcid; Cruz Blas, Carlos Aristóteles de la Upna Orcid; Algueta-Miguel, Jose M. Upna Orcid; López Martín, Antonio Upna Orcid (IEEE, 2020)   Artículo / Artikulua  OpenAccess
      A novel current-mode CMOS RMS-to-DC converter using translinear techniques is introduced. It is based on a squarer/divider cell that is implemented using an electronically simulated loop with a novel biasing scheme that ...
    • 100 años de Leonard Bernstein, 60 años de los Conciertos para Jóvenes 

      Sáenz Abárzuza, Igor Upna Orcid (IFIDMA, 2018)   Artículo / Artikulua  OpenAccess
      18 de enero del año 1958. Obertura de Guillaume Tell, compás 226, Allegro Vivace. Al acabar la pieza, el director y presentador del concierto, Leonard Bernstein[1], dirigido al joven auditorio, preguntaba: “Bien. ¿De qué ...
    • 101 Dothideomycetes genomes: a test case for predicting lifestyles and emergence of pathogens 

      Haridas, Sajeet; Castanera Andrés, Raúl Upna Orcid; Culley, D. E.; Daum, C.; Ramírez Nasto, Lucía Upna Orcid; Alfaro Sánchez, Manuel Upna Orcid (Westerdijk Fungal Biodiversity Institute, 2020)   Artículo / Artikulua  OpenAccess
      Dothideomycetes is the largest class of kingdom Fungi and comprises an incredible diversity of lifestyles, many of which have evolved multiple times. Plant pathogens represent a major ecological niche of the class ...
    • 119Sn Mössbauer spectroscopy for assessing the local stress and defect state towards the tuning of Ni-Mn-Sn alloys 

      Unzueta, Iraultza; López García, Javier Upna; Sánchez-Alarcos Gómez, Vicente Upna Orcid; Recarte Callado, Vicente Upna Orcid; Pérez de Landazábal Berganzo, José Ignacio Upna Orcid (AIP Publishing, 2017)   Artículo / Artikulua  OpenAccess
      The influence of defects and local stresses on the magnetic properties and martensitic transformation in Ni50Mn35Sn15 is studied at macroscopic and atomic scale levels. We show that both the structural and magnetic properties ...
    • 15-item version of the Boston naming test: normative data for the Latin American spanish-speaking adult population. 

      Cacho Tena, Ana María del; Merced, Kritzia; Perrin, Paul B.; Arango Lasprilla, Juan Carlos; Olabarrieta Landa, Laiene Upna Orcid; Rivera, Diego Upna Orcid (American Psychological Association, 2023)   Artículo / Artikulua  OpenAccess
      Objective: Naming is commonly impaired in people with neurodegenerative diseases and brain injury, and as a result, its accurate assessment is essential. The aim of this study was to provide normative data for the 15-item ...
    • 150 años de historia de la ética del Trabajo Social en España: periodización de sus valores éticos 

      Idareta Goldaracena, Francisco Upna Orcid; Úriz Pemán, María Jesús Upna Orcid; Viscarret Garro, Juan Jesús Upna Orcid (Universidad Complutense de Madrid, 2017)   Artículo / Artikulua  OpenAccess
      Desde que iniciase su andadura como profesión en España, ha quedado constancia del compromiso ético de las y los profesionales del Trabajo Social en las respuestas que han venido ofreciendo en cada época a los conflictos ...
    • 2020: el informe de la minoría y la curación de la música 

      Sáenz Abárzuza, Igor Upna Orcid (Associació Webdemusica.org, 2020)   Artículo / Artikulua  OpenAccess
      Reflexiones sobre el uso de la música en la publicidad y el mercado musical.
    • 2021 y la (L)libertad: una playlist de versiones y per-versiones de Blackbird 

      Sáenz Abárzuza, Igor Upna Orcid (Associació Webdemusica.org, 2021)   Artículo / Artikulua  OpenAccess
      Sobre las versiones que se han hecho de la canción Blackbird, escrita por Paul McCartney para The Beatles.
    • 2023, Casals y el azar 

      Sáenz Abárzuza, Igor Upna Orcid (Associació Webdemusica.org, 2023)   Artículo / Artikulua  OpenAccess
      Artículo escrito con motivo del cincuenta aniversario de la muerte de Pau Casals.
    • 25 years of continuous sewage sludge application vs. mineral fertilizers on a calcareous soil affected pH but not soil carbonates 

      De Soto García, I. S. Upna Orcid; Zamanian, Kazem; Urmeneta Martín-Calero, Henar; Enrique Martín, Alberto Upna Orcid; Virto Quecedo, Íñigo Upna Orcid (Frontiers Media, 2022)   Artículo / Artikulua  OpenAccess
      Inorganic and organic fertilizers have been widely used to maintain crop yields. However, several studies have demonstrated that the dissolution of carbonates in agricultural soils by the acidification induced by N-fertilizers ...
    • 250 km ultra long remote sensor system based on a fiber loop mirror interrogated by an OTDR 

      Bravo Acha, Mikel Upna Orcid; Baptista, José Manuel; Santos, José Luís; López-Amo Sáinz, Manuel Upna Orcid; Frazão, Orlando (Optical Society of America, 2011)   Artículo / Artikulua  OpenAccess
      A 253 km ultra long remote displacement sensor system based on a fiber loop mirror interrogated by a commercial OTDR is proposed and experimentally demonstrated. The use of a fiber loop mirror increases the signal to noise ...
    • A 3-D indoor analysis of path loss modeling using kriging techniques 

      Diago Mosquera, Melissa; Aragón Zavala, Alejandro; Azpilicueta Fernández de las Heras, Leyre Upna Orcid; Shubair, Raed M.; Falcone Lanas, Francisco Javier Upna Orcid (IEEE, 2022)   Artículo / Artikulua  OpenAccess
      This study proposes a novel measurement-based method to predict and model three-dimensional (3-D) path loss in indoor scenarios, which first regresses 28 GHz measurements via median path loss modeling and then includes ...
    • 3-D printed horn antennas and components performance for space and telecommunications 

      Teniente Vallinas, Jorge; Iriarte Galarregui, Juan Carlos; Caballero Nagore, Rubén; Valcázar Berdofe, Daniel; Goñi, Mikel; Martínez, Aitor (IEEE, 2018)   Artículo / Artikulua  OpenAccess
      In this work, a study of the performance of several antennas and components, manufactured using an accurate stereolithography 3D printer and resin for maximum accuracy and detail, is carried out. Electroless plating of ...
    • 3-D-printed transmit-array antenna for broadband backhaul 5G links at V-band 

      Matos, Sérgio A.; Teixeira, Jorge P.; Costa, Jorge R.; Fernandes, Carlos A.; Río Bocio, Carlos del Upna Orcid (IEEE, 2020)   Artículo / Artikulua  OpenAccess
      The low cost and compactness of transmit-array antennas (TAs) make them attractive for 5G backhaul links. However, the TA advantage is less obvious when considering the broadband operation requirement. Two main factors ...
    • 300 GHz optoelectronic transmitter combining integrated photonics and electronic multipliers for wireless communication 

      Ali, Muhsin; Pérez Escudero, José Manuel Upna Orcid; Guzmán Martínez, Robinson Cruzoe; Lo, Mu Chieh; Ederra Urzainqui, Íñigo Upna Orcid; Gonzalo García, Ramón Upna Orcid; García Muñoz, Luis Enrique (MDPI, 2019)   Artículo / Artikulua  OpenAccess
      THz communications systems at carrier frequencies above 200 GHz are the key to enable next-generation mobile communication networks with 100 Gbit/s wireless data rates. One of the key questions is, which carrier frequency ...
    • 360 nW gate-driven ultra-low voltage CMOS linear transconductor with 1 MHz bandwidth and wide input range 

      Rico-Aniles, Héctor Daniel; Ramírez-Angulo, Jaime; López Martín, Antonio Upna Orcid; González Carvajal, Ramón (IEEE, 2020)   Artículo / Artikulua  OpenAccess
      A low voltage linear transconductor is introduced. The circuit is a pseudo differential architecture that operates with ±0.2V supplies and uses 900nA total biasing current. It employs a floating battery technique to achieve ...
    • A 3D ray launching time-frequency channel modeling approach for UWB ranging applications 

      Otim, Timothy Upna; López Iturri, Peio Upna Orcid; Azpilicueta Fernández de las Heras, Leyre Upna Orcid; Bahillo, Alfonso; Falcone Lanas, Francisco Javier Upna Orcid (IEEE, 2020)   Artículo / Artikulua  OpenAccess
      Ultrawideband (UWB) has the ability to achieve decimetre level of ranging accuracy, hence, its wider usage nowadays in the field of positioning. In spite of the attractiveness of UWB, its performance is strongly dependent ...

      El Repositorio ha recibido la ayuda de la Fundación Española para la Ciencia y la Tecnología para la realización de actividades en el ámbito del fomento de la investigación científica de excelencia, en la Línea 2. Repositorios institucionales (convocatoria 2020-2021).
      Logo MinisterioLogo Fecyt