Now showing items 21-36 of 36

  • 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 ...
  • 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; Jiménez 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
    Open Access
    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 ...
  • Second order sigma-delta control of charge trapping for MOS capacitors 

    Bheesayagari, Chenna Reddy; Gorreta Mariné, Sergio; Pons Nin, Joan; Domínguez Pumar, Manuel (2017-09-01)
    Article
    Restricted access - publisher's policy
    This paper presents the circuit topology of a second order sigma-delta control of charge trapping for MOS capacitors. With this new topology it is possible to avoid the presence of plateaus that can be found in first-order ...
  • Self-calibrating closed-loop circuit for configurable constant voltage thermal anemometers 

    Gorreta Mariné, Sergio; Barajas Ojeda, Enrique; Kowalski, Lukasz; Atienza García, María Teresa; Domínguez Pumar, Manuel; Jiménez Serres, Vicente (Institution of Electrical Engineers, 2015-09-17)
    Article
    Open Access
    A new circuit is described which applies a configurable voltage across an RTD while the current flowing through it is measured with a current mirror. The circuit also allows working with voltages above the IC supply voltage ...
  • Sigma-delta effects and charge locking in capacitive MEMS under dielectric charge control 

    Giounanlis, Panagiotis; Gorreta Mariné, Sergio; Domínguez Pumar, Manuel; Pons Nin, Joan; Feely, Orla; Blokhina, Elena (2016-05)
    Article
    Open Access
    This work investigates, analytically and experimentally, the effects induced by the use of a first-order sigma-delta (S¿) feedback loop as a control method of dielectric charging for capacitive microelectromechanical systems ...
  • Simultaneous control of dielectric charge and device capacitance in electrostatic MEMS 

    Gorreta Mariné, Sergio; Pons Nin, Joan; Domínguez Pumar, Manuel (2015-12)
    Article
    Open Access
    This letter presents a double closed loop for simultaneously controlling the net dielectric charge and the device capacitance in contactless electrostatic MEMS devices. The first loop controls the net charge trapped in ...
  • Simultaneous control of dielectric charging and device capacitance for contactless electrostatic MEMS 

    Gorreta Mariné, Sergio (Universitat Politècnica de Catalunya, 2016-09-20)
    Master thesis (pre-Bologna period)
    Restricted access - author's decision
    Simultaneous control of dielectric charging and device capacitance for contactless electrostatic MEMS
  • Sliding mode analysis applied to improve the dynamical response of a spherical 3D wind sensor for Mars atmosphere 

    Atienza García, María Teresa; Kowalski, Lukasz; Gorreta Mariné, Sergio; Jiménez Serres, Vicente; Castañer Muñoz, Luis María; Domínguez Pumar, Manuel (2017-11-01)
    Article
    Open Access
    The objective of this paper is to show how the structure of a thermal wind anemometer can be tuned to ensure a fast response when the sensor works in closed loop configuration (constant temperature operation). If the thermal ...
  • Sliding-mode analysis of the dynamics of sigma-delta controls of dielectric charging 

    Domínguez Pumar, Manuel; Gorreta Mariné, Sergio; Pons Nin, Joan (Institute of Electrical and Electronics Engineers (IEEE), 2016-03-08)
    Article
    Open Access
    The purpose of this paper is to show that sigma-delta controllers of dielectric charge can be analyzed using the tools of sliding-mode controllers, in the infinite sampling frequency approximation. This allows to study the ...
  • Sliding mode control of heterogeneous systems 

    Domínguez Pumar, Manuel; Gorreta Mariné, Sergio; Atienza García, María Teresa; Blokhina, Elena; Pons Nin, Joan (2017-06-01)
    Part of book or chapter of book
    Restricted access - publisher's policy
    This paper establishes a link between closed-loop controls for heterogeneous systems and sliding mode controls. We demonstrate that sliding mode analysis matches with experimental results from dielectric charge controllers. ...
  • Spherical wind sensor for the atmosphere of mars 

    Kowalski, Lukasz; Atienza García, María Teresa; Gorreta Mariné, Sergio; Jiménez Serres, Vicente; Domínguez Pumar, Manuel; Silvestre Bergés, Santiago; Castañer Muñoz, Luis María (2016-04-01)
    Article
    Open Access
    A novel wind speed and direction sensor designed for the atmosphere of Mars is described. It is based on a spherical shell divided into four triangular sectors according to the central projection of tetrahedron onto the ...
  • Thermal dynamics modeling of a 3D wind sensor based on hot thin film anemometry 

    Atienza García, María Teresa; Kowalski, Lukasz; Gorreta Mariné, Sergio; Jiménez Serres, Vicente; Domínguez Pumar, Manuel (2018-02-01)
    Article
    Open Access
    The objective of this paper is to obtain time-varying models of the thermal dynamics of a 3D hot thin film anemometer for Mars atmosphere. To this effect, a proof of concept prototype of the REMS (Rover Environmental ...
  • Time-varying thermal dynamics modeling of the prototype of the REMS wind sensor 

    Atienza García, María Teresa; Kowalski, Lukasz; Gorreta Mariné, Sergio; Jiménez Serres, Vicente; Domínguez Pumar, Manuel (2017)
    Conference report
    Open Access
    The objective of this work is to show the results from the analysis of the thermal dynamics of a prototype of the REMS 3D wind anemometer using the tools of Diffusive Representation (DR). DR is a mathematical tool that ...
  • Understanding complexity in multiphysics systems-on-a-chip: modern approaches for design 

    Blokhina, Elena; O'Connell, D.; Andrade Miceli, Dennis; Gorreta Mariné, Sergio; Pons Nin, Joan; Domínguez Pumar, Manuel; Feely, Orla; Galayko, Dimitri (Institute of Electrical and Electronics Engineers (IEEE), 2015)
    Conference report
    Restricted access - publisher's policy
    The aim of this paper is to formalise the term “complexity” in the context of modern microelectronics, propose the definitions of key terms and discuss a case study. Our aim is to show that the term “complex system” is ...