Browsing by Subject "Sistemes microelectromecànics"

Now showing items 1-20 of 59

    • 2D Liquid Lens Based on EWOD 

      Ahmadi Zeidabadi, Maziar (Universitat Politècnica de Catalunya, 2012-09-10)
      Master thesis
      Open Access
      [ANGLÈS] This thesis presents the fabrication, development and characteristics of a liquid lens based on electrowetting. Essentially, when the lens is in liquid form, both its position and its curvature can be reversibly ...

    • A CubeSAT payload for in-situ monitoring of pentacene degradation due to atomic oxygen etching in LEO 

      Gorreta Mariné, Sergio; Pons Nin, Joan; López Rodríguez, Gema; Figueras, Eduard; Jové Casulleras, Roger; Araguz López, Carles; Via Ortega, Pol; Camps Carmona, Adriano José; Domínguez Pumar, Manuel (2016-09-01)
      Article
      Open Access
      This paper reports and discusses the design and ground tests of a CubeSat payload which allows to measure, in-situ and in real time, the degradation of a polymer of electronic interest due to atomic oxygen etching in LEO. ...

    • A highly-repeatable, broadband 180º phase switch for integrated MEMS processes 

      Llamas Morote, Marco Antonio; Girbau Sala, David; Ribó, M.; Pradell i Cara, Lluís; Giacomozzi, Flavio; Colpo, S.; Coccetti, Favio; Aouba, Stephane (2011)
      Conference report
      Restricted access - publisher's policy
      A broadband 0º/180º phase switch based on a slotline-coplanar-waveguide cross loaded with two MEMS switches in opposed (ON/OFF or OFF/ON) states, is reported. The fabrication was made on high-resistivity silicon substrates ...

    • A novel Σ-Δ pulsed digital oscillator (PDO) for MEMS 

      Domínguez Pumar, Manuel; Pons Nin, Joan; Ricart Campos, Jordi; Bermejo Pelayo, Agustin; Figueras Costa, Eduardo (IEEE, 2005-12)
      Article
      Open Access
      A novel digital oscillator topology for microelectromechanical systems (MEMS) based on bandpass sigma–delta modulation is presented. Short pulses of force of the same amplitude maintain the oscillation and the associated ...

    • A Second-order delta-sigma control of dielectric charge for contactless capacitive MEMS 

      Gorreta Mariné, Sergio; Pons Nin, Joan; Blokhina, Elena; Domínguez Pumar, Manuel (2015-04-01)
      Article
      Open Access
      This letter introduces a new second-order delta-sigma method for controlling the dielectric charge in contactless capacitive microelectromechanical systems. This method improves the one previously proposed by the authors, ...

    • A self-test and dynamics characterization circuit for MEMS electrostatic actuators 

      Fernández Martínez, Daniel; Madrenas Boadas, Jordi; Cosp Vilella, Jordi (2011-03)
      Article
      Restricted access - publisher's policy
      This paper presents a high-bandwidth capacitance estimation and driving circuit especially tailored for its use with MEMS electrostatic actuators. The circuit can be integrated as a part of a system comprising an electrostatic ...

    • A thickness-shear MEMS resonator employing electromechanical transduction through a coplanar waveguide 

      Johnson, W.L.; Wallis, T.M.; Kabos, P.; Rocas Cantenys, Eduard; Collado Gómez, Juan Carlos; Liew, L.A.; Ha, J.Y.; Davydov, A.V.; Plankis, A.; Heyliger, P.R. (2012)
      Conference report
      Restricted access - publisher's policy
      The design, modeling, fabrication, and characterization of a vibrationally trapped thickness-shear MEMS resonator is presented. This device is intended to avoid various limitations of flexural MEMS resonators, including ...

    • Advancements in microfabricated gas sensors and microanalytical tools for the sensitive and selective detection of odors 

      Perarnau Ollé, Enric; Farré Lladós, Josep; Casals Terré, Jasmina (Multidisciplinary Digital Publishing Institute (MDPI), 2020-09-24)
      Article
      Open Access
      In recent years, advancements in micromachining techniques and nanomaterials have enabled the fabrication of highly sensitive devices for the detection of odorous species. Recent efforts done in the miniaturization of gas ...

    • Analytical energy model for the dynamic behavior of RF MEMS switches under increased actuation voltage 

      Casals Terré, Jasmina; Llamas, Marco Antonio; Girbau Sala, David; Pradell i Cara, Lluís; Lázaro Guillén, Antonio; Giacomozzi, Flavio; Colpo, Sabrina (2014-12-01)
      Article
      Restricted access - publisher's policy
      In this paper, the dynamic behavior of electrostatically actuated radio frequency-microelectromechanical system (RF-MEMS) switches is analyzed using energy considerations. An analytical model for bridge-type RF-MEMS switches ...

    • Análisis clínico de pacientes tratados con un neuroestimulador 

      Company Se, Georgina (Universitat Politècnica de Catalunya, 2018-06-28)
      Bachelor thesis
      Restricted access - author's decision
      Para comercializar un equipo médico por Europa es necesario disponer del marcado CE que indica que el producto cumple con la legislación y los ...

    • Application of pulsed digital oscillators (PDO) 

      Notaro, Alessandro (Universitat Politècnica de Catalunya, 2011-03-30)
      Master thesis (pre-Bologna period)
      Open Access
      Català: En aquest treball, s'ha estudiat un sistema que ja existeix per la selecció de les modes de ressonància d'un ressonador MEMS actuant sobre paràmetres del llaç de re-alimentació. La caracterització es va completar ...

    • Arquitecturas y circuitos CMOS para el control, generación y procesado de señal de MEMS 

      Fernández Martínez, Daniel (Universitat Politècnica de Catalunya, 2008-11-01)
      Doctoral thesis
      Open Access
      En esta tesis se muestran arquitecturas y circuitos CMOS para el control de actuadores electroestáticos MEMS y para la generación y procesado de las señales proveniente de microsistemas. <br/>En el primer capítulo se ...

    • Caracterización y control de los efectos de la carga parásita en dispositivos MEMS 

      López Esteban, David (Universitat Politècnica de Catalunya, 2009-07-15)
      Master thesis (pre-Bologna period)
      Open Access
      Estudio y caracterización del efecto de la acumulación de carga en dispositivos MEMS mediante un modelo equivalente y la realización de medidas experimentales, todo ello con el objetivo de mantener el nivel de carga en el ...

    • Characterisation modelling and calibration of an electrothermal micromirror with 3DOF 

      Espinosa Casas, Alberto (Universitat Politècnica de Catalunya, 2012)
      Master thesis (pre-Bologna period)
      Restricted access - author's decision
      The work presented as follows is the final project of my five years Industrial Engineering degree. It tries to make good use of the skills acquired along the degree as well as to learn new ones. The project is focused in ...

    • Characterization method of the dynamics of the trapped charge in contactless capacitive MEMS 

      Gorreta Mariné, Sergio; Pons Nin, Joan; Domínguez Pumar, Manuel; Blokhina, Elena; Feely, Orla (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Conference report
      Restricted access - publisher's policy
      Dielectric charging of insulating films in microelectromechanical systems (MEMS) has a crucial effect on the operation of those devices. A new method is presented in order to characterize the dynamics of the charge trapped ...

    • Characterization of dynamics and power handling of RF MEMS using vector measurement techniques 

      Girbau Sala, David; Lázaro Guillén, Antoni; Pradell i Cara, Lluís (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2004-11-30)
      Article
      Open Access
      This paper proposes a new method to measure dynamics and power handling of RF microelectromechanical systems (MEMS) devices based on a mobile membrane. The method uses in-phase/quadrature demodulation of an RF signal ...

    • Circuit modeling of a MEMS varactor including dielectric charging dynamics 

      Giounanlis, Panagiotis; Andrade Miceli, Dennis; Gorreta Mariné, Sergio; Pons Nin, Joan; Domínguez Pumar, Manuel; Blokhina, Elena (Institute of Physics (IOP), 2016-06-01)
      Article
      Open Access
      Electrical models for MEMS varactors including the effect of dielectric charging dynamics are not available in commercial circuit simulators. In this paper a circuit model using lumped ideal elements available in the Cadence ...

    • Closed-loop compensation of dielectric charge induced by ionizing radiation 

      Domínguez Pumar, Manuel; Gorreta Mariné, Sergio; Pons Nin, Joan; Gomez Rodriguez, Faustino; Gonzalez Castaño, Diego; Muschitiello, Michele (2015-06-01)
      Article
      Open Access
      This letter investigates the capability of dielectric charge control loops to cope with charge induced by ionizing radiation. To this effect, an microelectromechanical systems (MEMS) variable capacitor has been irradiated ...

    • CMOS-MEMS resonant pressure sensors: optimization and validation through comparative analysis 

      Banerji, Saoni; Michalik, Piotr Jozef; Méndez Fernández, Daniel; Madrenas Boadas, Jordi; Mola, Albert; Montanyà, Josep (2017-09-01)
      Article
      Open Access
      An optimized CMOS-MEMS resonant pressure sensor with enhanced sensitivity at atmospheric pressure has been reported in this paper. The presented work reports modeling and characterization of a resonant pressure sensor, ...

    • 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
      Restricted access - publisher's policy
      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 ...