Browsing by Author "Ricart Campos, Jordi"

Now showing items 1-14 of 14

    • A miniaturized two axis sun sensor for attitude control of nano-satellites 

      Angulo, M.; Gras, Ana; Ortega Villasclaras, Pablo Rafael; López Rodríguez, Gema; Ricart Campos, Jordi; Domínguez Pumar, Manuel; Castañer Muñoz, Luis María; Quero, J.M.; Tarrida, C. L.; Reina, M. (2010-10-10)
      Article
      Open Access
      This paper describes the design, fabrication, characterization, and satellite integration of a miniaturized two axis sun sensor which has been used in the attitude control system of the Spanish nano-satellite NANOSAT-1B. ...

    • 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 ...

    • Applications of hot film anemometry to space missions 

      Jiménez Serres, Vicente; Domínguez Pumar, Manuel; Ricart Campos, Jordi; Kowalski, Lukasz; Navarro, Sara; torres, josefina; Castañer Muñoz, Luis María (VDE Conference Publications, 2008)
      Conference report
      Restricted access - publisher's policy
      In this paper the most important constraints of the wind sensors for the Martian atmosphere are described, along with an overview of the past successful designs. Practically all the data available today about the Martian ...

    • Capillary-driven microfluidics: impacts of 3D manufacturing on bioanalytical devices 

      Azizian, Pooya; Casals Terré, Jasmina; Ricart Campos, Jordi; Cabot, Joan Marc (Royal Society of Chemistry (RSC), 2023-01-01)
      Article
      Open Access
      Over decades, decentralized diagnostics continues to move towards rapid and cost-effective testing at the point-of-care (POC). Although microfluidics has become a key enabling technology for POC testing, the need for robust ...

    • 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 Mariné, Sergio; 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 ...

    • Coupling capillary-driven microfluidics with lateral flow immunoassay for signal enhancement 

      Azizian, Pooya; Casals Terré, Jasmina; Guerrero-SanVicente, Elena; Grinyte, Ruta; Ricart Campos, Jordi; Cabot, Joan Marc (Multidisciplinary Digital Publishing Institute (MDPI), 2023-08-01)
      Article
      Open Access
      Microfluidics has emerged as a versatile technology that is applied to enhance the performance of analytical techniques, among others. Pursuing this, we present a capillary-driven microfluidic device that improves the ...

    • Diffusion-free valve for preprogrammed immunoassay with capillary microfluidics 

      Azizian, Pooya; Casals Terré, Jasmina; Ricart Campos, Jordi; Cabot, Joan Marc (Nature, 2023-12-01)
      Article
      Open Access
      By manipulating the geometry and surface chemistry of microfluidic channels, capillary-driven microfluidics can move and stop fluids spontaneously without external instrumentation. Furthermore, complex microfluidic circuits ...

    • Digital resonance for MEMS 

      Ricart Campos, Jordi; Pons Nin, Joan; Gorreta Mariné, Sergio; Domínguez Pumar, Manuel (IEEE Press. Institute of Electrical and Electronics Engineers, 2009-02-11)
      Conference report
      Open Access
      This work shows the application of Pulsed Digital Oscillators to the detection of physical changes in MEMS devices that cause small shifts in their resonance frequencies. Such devices can be used as resonators in several ...

    • General dynamics of pulsed digital oscillators 

      Domínguez Pumar, Manuel; Pons Nin, Joan; Ricart Campos, Jordi (IEEE, 2008-02-08)
      Article
      Open Access
      The objective of this work is to analyze pulsed digital oscillators (PDOs), as dynamical systems. It is proved that under some conditions, the bitstream at the output of the oscillator is that of the sign of a sampled ...

    • Multilevel passive microfluidics for electrochemical biosensors 

      Azizian, Pooya; Ortega Novillo, Adrián; Ricart Campos, Jordi; Casals Terré, Jasmina; Cabot, Joan Marc (2020)
      Conference lecture
      Restricted access - publisher's policy
      Herein, we present a proof-of-concept 3D (multilevel) passive microfluidic device for point-of-care applications including electrochemical biosensors. Multiphase flow (air-water interface) within multilevel microchannels ...

    • On some properties of the output of a pulsed digital oscillator working with multiple resonances 

      Blokhina, Elena; Feely, Orla; Ricart Campos, Jordi; Domínguez Pumar, Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2010)
      Conference report
      Open Access
      In this paper, we study the possible output of the pulsed digital oscillator (PDO) with multiple resonant modes of the mechanical resonator in the feedback loop. PDOs are simple circuits that allow linear resonators to ...

    • Pulsed digital oscillators 

      Domínguez Pumar, Manuel; Ricart Campos, Jordi; Pons Nin, Joan; Rubio, Felix (Institute of Electrical and Electronics Engineers (IEEE), 2008)
      Conference lecture
      Open Access
      The objective of this paper is to collect the main latest results on pulsed digital oscillators. Rigorous and experimental results are presented that show what kind of sequences are at their output, the relation between ...

    • Tracking control system using an incident radiation angle microsensor 

      Quero Reboul, José Ma.; Aracil Fernández, Carmen; García Franquelo, Leopoldo; Ricart Campos, Jordi; Ortega Villasclaras, Pablo Rafael; Domínguez Pumar, Manuel; Castañer Muñoz, Luis María; Osuna, Rafael (IEEE, 2007-01-27)
      Article
      Open Access
      For some industrial applications, an accurate estimation of a light source position is needed. That is the case for a heliostat, a device that projects sunlight onto a focus hundreds of meters away from its aiming point. ...