Exploració per tema "Sistemes microelectromecànics"

Ara es mostren els items 21-40 de 68

    • Comparison of air gap breakdown and substrate injection as mechanisms to induce dielectric charching in microelectromechanical switches 

      Molinero Giles, David; Castañer Muñoz, Luis María (American Institute of Physics, 2008-01-29)
      Article
      Accés restringit per política de l'editorial
      Experiments show that air breakdown and substrate carrier conduction can be responsible of the dielectric charging of microelectromechanical devices after electrical stress. Test conducted under vacuum allows us to isolate ...

    • Crossbar-based memristive logic-in-memory architecture 

      Papandroulikadis, Georgios; Vourkas, Ioannis; Abustelema, Angel; Sirakoulis, Georgios; Rubio Sola, Jose Antonio (2017-04-01)
      Article
      Accés obert
      The use of memristors and resistive random access memory (ReRAM) technology to perform logic computations, has drawn considerable attention from researchers in recent years. However, the topological aspects of the ...

    • Curvature of BEOL cantilevers in CMOS-MEMS processes 

      Valle Fraga, Juan José; Fernández Martínez, Daniel; Madrenas Boadas, Jordi; Barrachina, Laura (2017-08-01)
      Article
      Accés obert
      This paper presents the curvature characterization results of released back-end-of-line 5 µm-wide cantilevers for two different 0.18-µm 1P6M complementary metal-oxide semiconductor microelectromechanical systems processes. ...

    • Desenvolupament dʼun element translineal dʼalt ample de banda per al processat de senyal de MEMS i dels seus circuits associats 

      Riera Baylach, Marc (Universitat Politècnica de Catalunya, 2010-03)
      Projecte/Treball Final de Carrera
      Accés obert
      La realització dʼaquest projecte parteix del mètode de control de lʼestàtica i la dinàmica per actuadors electrostàtics MEMS per posicionament analògic proposat per Daniel Fernández i Jordi Madrenas en el paper “Position, ...

    • Design of a charge injection compensation system for MEMS electrostatic actuators 

      Karliński, Kamil (Universitat Politècnica de Catalunya, 2010)
      Projecte/Treball Final de Carrera
      Accés obert
      The main goal of this project is to implement and experimentally verify various control algorithms for MEMS electrostatic actuators. Those algorithms include a charge injection compensation subsystem. The hardware ...

    • Design of Low Noise Readout Amplifiers for Monolithic Capacitive CMOS-MEMS Accelerometers 

      Sánchez Chiva, José María (Universitat Politècnica de Catalunya, 2014-09-09)
      Projecte Final de Màster Oficial
      Accés obert
      [ANGLÈS] This thesis report describes the design process, the implementation and the simulation and measurement results of two different readout circuits to be used with two monolithic MEMS accelerometers fabricated by ...

    • Design, Modeling, Identification and Control of Mechatronic Systems 

      Gomis Bellmunt, Oriol (Universitat Politècnica de Catalunya, 2007-05-21)
      Tesi
      Accés obert
      Les societats modernes plantegen nous reptes que demanden noves maneres de tractar els projectes d'enginyeria. Els enginyers han d'afrontar aquests reptes i desenvolupar solucions òptimes i eficients pels problemes clàssics ...

    • Dielectric charge control in electrostatic MEMS positioners/varactors 

      Blokhina, Elena; Gorreta Mariné, Sergio; Lopez, David; Molinero Giles, David; Feely, Orla; Pons Nin, Joan; Domínguez Pumar, Manuel (2012-06)
      Article
      Accés restringit per política de l'editorial
      A new dynamical closed-loop method is proposed to control dielectric charging in capacitive microelectromechanical systems (MEMS) positioners/varactors for enhanced reliability and robustness. Instead of adjusting the ...

    • Dielectric charge measurements in capacitive microelectromechanical switches 

      Molinero Giles, David; Comulada Simpson, Ricard; Castañer Muñoz, Luis María (American Institute of Physics, 2006-09-06)
      Article
      Accés restringit per política de l'editorial
      Measurements of transient currents from the discharge of microelectromechanical capacitive switches after charging the dielectric with an ion gun are reported. It is shown that both the charge sign and the charge amount ...

    • Diseño de una plataforma de desarrollo de algoritmos de control para Actuadores electrostáticos MEMS 

      Casas Martínez, José Luis (Universitat Politècnica de Catalunya, 2014-03-26)
      Projecte/Treball Final de Carrera
      Accés obert
      [ANGLÈS] The design of a platform for development of algorithms to control electrostatic actuators MEMS is proposed. This platform forms, an electronic circuit for the estimation of the distance or the capacity of an ...

    • Diseño y construcción de un banco de test y diagnosis de acelerómetros duales 

      Badia Arumí, Martí; Vidal Álvarez, Pablo (Universitat Politècnica de Catalunya, 2012-06)
      Projecte/Treball Final de Carrera
      Accés restringit per decisió de l'autor
      En este proyecto se diseña y construye un prototipo de banco de test para acelerómetros duales. En primer lugar se hace una revisión del estado del arte y las técnicas empleadas en la actualidad para el test de dispositivos ...

    • Diseño, fabricación y caracterización de una red reconfigurable de alimentación de antenas tipo slotline 

      Abad González, Ferran (Universitat Politècnica de Catalunya, 2009-01-20)
      Projecte/Treball Final de Carrera
      Accés obert
      Con este proyecto se pretende demostrar la posibilidad de implementar varias estructuras reconfigurables, basadas en la tecnología uniplanar, para alimentar antenas de tipo slotline en banda K. En concreto se expone el ...

    • Dispositivos de medición de frecuencia reconfigurables = Reconfigurable frequency measurement devices 

      Espinosa Espinosa, Moisés Isaac (Universitat Politècnica de Catalunya, 2015-11-23)
      Tesi
      Accés obert
      This thesis presents reconfigurable microwave discriminators used for the development of reconfigurable measurement circuits with high miniaturization, low power consumption, reduced weight and cost. The concept is ...

    • Disseny d'un programari de control per aplicacions basades en oscil·ladors digitals polsats (pdo) 

      Caelles Vilà, Enric (Universitat Politècnica de Catalunya, 2014-11)
      Projecte Final de Màster Oficial
      Accés obert
      [ANGLÈS] Nowadays the micro and nanotechnologies investigation group has three kinds of resonators technologies based in MEMS (micro-electro-mechanical devices) technology which are thermoelectric, electrostatic and ...

    • Electrothermally actuated RF MEMS switches suspended on a low-resistivity substrate 

      Girbau Sala, David; Pradell i Cara, Lluís; Lázaro Guillén, Antoni; Nebot Serra, Àlvar (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2007-10-31)
      Article
      Accés obert
      This paper presents an electrothermally actuated lateral resistive-contact switch for application to low-gigahertz-band communication systems. It was manufactured on a standard low-resistivity substrate, and its RF performance ...

    • Energy efficient control of electrostatically actuated MEMS 

      Fargas Marquès, Andreu (Universitat Politècnica de Catalunya, 2016-01-22)
      Tesi
      Accés obert
      Plenty of Micro-electro-mechanical Systems (MEMS) devices are actuated using electrostatic forces, and specially, parallel-plate actuators are extensively used, due to the simplicity of their design. Nevertheless, ...

    • Energy-efficient full-range oscillation analysis of parallel-plate electrostatically actuated MEMS resonators 

      Fargas-Marques, Andreu; Costa Castelló, Ramon (2017-09-01)
      Article
      Accés obert
      Electrostatic parallel-plate actuators are a common way of actuating microelectromechanical systems, both statically and dynamically. Nevertheless, actuation voltages and oscillations are limited by the nonlinearity of the ...

    • Enhanced robustness of a bridge-type Rf-Mems switch for enabling applications in 5G and 6G communicationsr 

      Casals Terré, Jasmina; Pradell i Cara, Lluís; Heredia, Julio; Giacomozzi, Flavio; Iannacci, Jacopo; Contreras Lizárraga, Adrián; Ribó Pal, Miquel (2022-11-01)
      Article
      Accés obert
      In this paper, new suspended-membrane double-ohmic-contact RF-MEMS switch configurations are proposed. Double-diagonal (DDG) beam suspensions, with either two or three anchoring points, are designed and optimized to minimize ...

    • Estudi sobre aplicacions dinàmiques d'un exoesquelet amb finalitats terapèutiques físiques 

      Álvarez Tintó, Miquel (Universitat Politècnica de Catalunya, 2023-05-25)
      Treball Final de Grau
      Accés obert
      Aquest projecte té la intenció d’avançar en àmbit de la rehabilitació de pacients els quals, d’alguna forma o altre, necessitin assistència per fer exercicis. Principalment, es tractarà d’entendre el moviment del braç des ...

    • Experimental study and redesign of a vision based control system for Microassembly Workstation 

      López-Dóriga Guerra, Sergio (Universitat Politècnica de Catalunya / Sabanci Universitesi, 2011)
      Projecte/Treball Final de Carrera
      Accés restringit per decisió de l'autor
      The vision based control (or visual servoing) for the mechanical manipulation of micro particles is the main eld of work of this thesis. Micromanipulation of micro- electro-mechanical systems (MEMS) is an everyday more ...