Now showing items 1-13 of 13

  • 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, ...
  • Activation of different MEMS resonant modes with pulsed digital oscillators 

    Domínguez Pumar, Manuel; Blokhina, Elena; Pons Nin, Joan; Feely, Orla; Sanchez Rojas, Jose Luis (Springer Verlag, 2010)
    Conference report
    Open Access
    The objective of this work is to show that is possible to excite different vibration modes of MEMS resonators using Pulsed Digital Oscillators. This class of circuits exhibit two different behaviours: the oscillation and ...
  • Control of MEMS vibration modes with pulsed digital Oscillators. Part II: simulation and experimental results 

    Domínguez Pumar, Manuel; Ricart Campos, Jordi; Pons Nin, Joan; Blokhina, Elena; Gorreta, Sergi; Hernando, Jorge; Manzaneque, Tomas; Sanchez Rojas, Jose Luis; Feely, Orla (2010-08)
    Article
    Open Access
    This paper extends our previous work on the selective excitation of mechanical vibration modes in MEMS devices using pulsed digital oscillators (PDOs). It begins by presenting extensive simulation results using the set ...
  • Control of MEMS vibration modes with pulsed digital oscillators: part I—theory 

    Blokhina, Elena; Pons Nin, Joan; Ricart Campos, Jordi; Feely, Orla; Domínguez Pumar, Manuel (2010-08)
    Article
    Open Access
    The aim of this paper is to show that it is possible to excite selectively different mechanical resonant modes of a MEMS structure using pulsed digital oscillators (PDOs). This can be done by simply changing the working ...
  • Delta-sigma control of dielectric charge for contactless capacitive MEMS 

    Gorreta Mariné, Sergio; Pons Nin, Joan; Blokhina, Elena; Feely, Orla; Domínguez Pumar, Manuel (2014-08-01)
    Article
    Restricted access - publisher's policy
    In this paper, we present a new closed-loop control method of dielectric charge for contactless capacitive microelectromechanical systems. The method uses a feedback loop to maintain the net charge in the dielectric layer ...
  • Dielectric charge control in electrostatic MEMS positioners/varactors 

    Blokhina, Elena; Gorreta, Sergi; Lopez, David; Molinero Giles, David; Feely, Orla; Pons Nin, Joan; Domínguez Pumar, Manuel (2012-06)
    Article
    Restricted access - publisher's policy
    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 ...
  • Dynamics of the MEMS pulsed digital oscillator with multiple delays in the feedback loop 

    Blokhina, Elena; Feely, Orla; Domínguez Pumar, Manuel (IEEE Press. Institute of Electrical and Electronics Engineers, 2009-05)
    Conference report
    Open Access
    In this paper we apply methods of nonlinear dynamics to examine the behavior of the pulsed digital oscillator for microelectromechanical systems (MEMS). We study the regions of existence of oscillations and demonstrate ...
  • Excitation of multiple spatial modes of a MENS cantilever in the pulsed digital oscillator 

    Blokhina, Elena; Feely, Orla; Domínguez Pumar, Manuel (IEEE Press. Institute of Electrical and Electronics Engineers, 2009)
    Conference report
    Open Access
    The aim of this paper is to apply an approach that will allow us to consider different mechanical modes of a MEMS cantilever in the form of separate mass-spring-damper equations with the appropriate form of an external ...
  • Modelling of a charge control method for capacitive MEMS 

    Giounanlis, Panonios; Blokhina, Elena; Feely, Orla; Domínguez Pumar, Manuel; Pons Nin, Joan; Gorreta Mariné, Sergio (Institute of Electrical and Electronics Engineers (IEEE), 2013)
    Conference report
    Restricted access - publisher's policy
    Charging of dielectric materials in microelectromechanical systems (MEMS) actuated electrostatically is a major reliability issue. In our previous work we proposed a feedback loop control method that is implemented as ...
  • Nonlinear dynamics and bifurcation behavior of a 2-DOF spring resonator with end stopper for energy harvesting 

    El Aroudi, Abdelali; Blokhina, Elena; O'Connell, D.; Fu, B.; Frizzell, R.; Feely, Orla; Alarcón Cot, Eduardo José (EDP Sciences, 2014)
    Conference report
    Open Access
    In this paper, the model of a two-degree-of-freedom (2-DOF) spring resonator with end stopper for an energy harvesting application is presented. Then we characterize its nonlinear dynamical behavior by numerical simulations ...
  • Piezo-MUMPS batch #1. First Report. 

    Pons Nin, Joan; Gorreta Mariné, Sergio; Domínguez Pumar, Manuel; Blokhina, Elena; O'Connell, D. (2013-07-12)
    External research report
    Restricted access - confidentiality agreement
  • Pulsed digital oscillators for electrostatic MEMS 

    Gorreta Mariné, Sergio; Ruiz Fernández, Daniel; Blokhina, Elena; Pons Nin, Joan; Jimenez Serres, Vicente; O'Connell, D.; Feely, Orla; Madrenas Boadas, Jordi; Domínguez Pumar, Manuel (2012)
    Article
    Restricted access - publisher's policy
    This paper introduces a new actuation scheme for implementing Pulsed Digital Oscillators (PDOs) for electrostatic MEMS resonators. In this scheme, the capacitance of the device is biased with a voltage and it is periodically ...
  • Real-time characterization of dielectric charging in contactless capacitive MEMS 

    Domínguez Pumar, Manuel; Gorreta Mariné, Sergio; Pons Nin, Joan; Blokhina, Elena; Giounanlis, Panonios; Feely, Orla (2015-03-01)
    Article
    Restricted access - publisher's policy
    This paper presents a new method to characterize the dynamics of the charge trapped in the dielectric layer of contactless microelectromechanical systems. For sampled-time systems, this allows knowing the state of the net ...