Now showing items 1-20 of 33

  • A comprehensive high-level model for CMOS-MEMS resonators 

    Banerji, Saoni; Fernández, Daniel; Madrenas Boadas, Jordi (2018-01-24)
    Article
    Open Access
    This paper presents a behavioral modeling technique for CMOS microelectromechanical systems (MEMS) microresonators that enables simulation of an MEMS resonator model in Analog Hardware Description Language format within a ...
  • Action potential propagation: ion current or intramembrane electric field? 

    Martí Cabarrocas, Albert; Pérez González, Juan Jesús; Madrenas Boadas, Jordi (2018-01-22)
    Article
    Open Access
    The established action potential propagation mechanisms do not satisfactorily explain propagation on myelinated axons given the current knowledge of biological channels and membranes. The flow across ion channels presents ...
  • AER-SRT: scalable spike distribution by means of synchronous serial ring topology address event representation 

    Dorta Pérez, Silvestre Taho; Zapata Rodríguez, Mireya; Madrenas Boadas, Jordi; Sánchez Rivera, Giovanny (2016-01-01)
    Article
    Open Access
    Given the massive number of interconnects in Spiking Neural Networks (SNNs), distributing spikes effciently becomes a critical issue for the efficient hardware emulation of large-scale SNNs. In this work, the AER-SRT ...
  • Analog VLSI implementation of kernel-based classifiers 

    Verleysen, Michel; Thissen, P.; Madrenas Boadas, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 1994)
    Conference report
    Open Access
    Kernel-based classifiers are neural networks (radial basis functions) where the probability densities of each class of data are first estimated, to be used thereafter to approximate Bayes boundaries between classes. Such ...
  • An asynchronous finite-state-machine-based buck-boost converter for on-chip adaptive power supply 

    Fernández, Daniel; Madrenas Boadas, Jordi; Alarcón Cot, Eduardo José (2013-01)
    Article
    Restricted access - publisher's policy
    In this paper we present an asynchronous finite-state machine digital controller co-integrated with an on-chip non-inverting buck-boost power converter with dynamic signal-tracking capabilities. The mostly-digital controller ...
  • 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 translinear, log-domain FPAA on standard CMOS technology 

    Fernández, Daniel; Martínez Alvarado, Luis Arturo; Madrenas Boadas, Jordi (2012-02)
    Article
    Restricted access - publisher's policy
    A field-programmable analog array (FPAA) using a standard-CMOS wide-dynamic-range translinear element (TE) is introduced. The FPAA configurable analog blocks (CABs) are based on a reconfigurable translinear cell (RTC), ...
  • Bioinspired sensory integration for environment-perception embedded systems 

    Madrenas Boadas, Jordi; Fernández Martínez, Daniel; Cosp Vilella, Jordi; Moreno Aróstegui, Juan Manuel; Martínez Alvarado, Luis Arturo; Sánchez Rivera, Giovanny (2011)
    Conference report
    Restricted access - publisher's policy
    In this work, the architecture of a system intended for bioinspired environment perception is described. Considering the technology trends and applications requirements, the properties of such a system are discussed. ...
  • Characterization of CMOS-MEMS resonant pressure sensors 

    Banerji, Saoni; Fernández Martínez, Daniel; Madrenas Boadas, Jordi (2017-08-30)
    Article
    Open Access
    IEEE Comprehensive characterization results of a CMOS-MEMS resonant pressure sensor are presented. We have extensively evaluated the key performance parameters of our device in terms of quality factor (Q) variations under ...
  • Closed-form equation for natural frequencies of beams under full range of axial loads modeled with a spring-mass system 

    Valle Fraga, Juan José; Fernández Martínez, Daniel; Madrenas Boadas, Jordi (2019-04-01)
    Article
    Open Access
    A new simple closed-form equation that accurately predicts the effect of an arbitrarily large constant axial load, residual stress or temperature shift on the natural frequencies of an uniform single-span beam, with various ...
  • CMOS BEOL-embedded z-axis accelerometer 

    Michalik, Piotr Jozef; Sánchez Chiva, José María; Fernández Martínez, Daniel; Madrenas Boadas, Jordi (Institution of Electrical Engineers, 2015-05-28)
    Article
    Open Access
    A first reported complementary metal-oxide semiconductor (CMOS)-integrated acceleration sensor obtained through isotropic inter-metal dielectric (IMD) etching of a back-end-of-line (BEOL) integrated circuit interconnection ...
  • 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, ...
  • Continuous-time CMOS adaptive asynchronous sigma-delta modulator approximating low-fs low-inband-error on-chip wideband power amplifier 

    Alarcón Cot, Eduardo José; Fernández, Diego; García Tormo, Albert; Madrenas Boadas, Jordi; Poveda López, Alberto (IEEE, 2011)
    Conference report
    Restricted access - publisher's policy
    A mixed-signal continuous-time-processing standard CMOS implementation of an asynchronous sigma-delta modulator aimed to drive a switching amplifier operating as an on-chip wideband adaptive power supply is presented in ...
  • Curvature of BEOL cantilevers in CMOS-MEMS processes 

    Valle, Juan José; Fernández Martínez, Daniel; Madrenas Boadas, Jordi; Barrachina, Laura (2017-08-01)
    Article
    Open Access
    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. ...
  • Experiments on MEMS Integration in 0.25 turn CMOS Process 

    Michalik, Piotr Jozef; Fernández, Daniel; Wietstruck, Mehmet; Kaynak, Mehmet; Madrenas Boadas, Jordi (Multidisciplinary Digital Publishing Institute (MDPI), 2018-07-01)
    Article
    Open Access
    In this paper, we share our practical experience gained during the development of CMOS-MEMS (Complementary Metal-Oxide Semiconductor Micro Electro Mechanical Systems) devices in IHP SG25 technology. The experimental ...
  • Giant Magnetoresistance (GMR) sensors for 0.35µm CMOS technology sub-mA current sensing 

    De Marcellis, A.; Reig, C; Cubells Beltrán, M. Dolores; Madrenas Boadas, Jordi; Cardoso, F; Cardoso, S.; Freitas, P.P (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Conference report
    Restricted access - publisher's policy
    This paper reports on the design and fabrication of microelectronic structures for non-invasive indirect electric current sensing at the IC level. A 0.35 ¿m CMOS ASIC has been specifically developed for this purpose. Then, ...
  • Integration of GMR sensors with different technologies 

    Cubells Beltrán, M. Dolores; Reig Escriva, Abilio Càndid; Madrenas Boadas, Jordi; De Marcellis, A.; Santos, Joana; Cardoso, Susana; Freitas, P.P. (2016-06-01)
    Article
    Open Access
    Less than thirty years after the giant magnetoresistance (GMR) effect was described, GMR sensors are the preferred choice in many applications demanding the measurement of low magnetic fields in small volumes. This rapid ...
  • JubiTool: Unified design flow for the perplexus SIMD hardware accelerator 

    Robert, M.; Volken, H.; Brousse, O.; Guillot, J.; Gil, T.; Grize, F.; Sassatelli, G.; Moreno Aróstegui, Juan Manuel; Madrenas Boadas, Jordi; Villa, A. (IEEE Computer Society Publications, 2009)
    Conference report
    Open Access
    This paper presents a new unified design flow developed within the Perplexus project that aims to accelerate parallelizable data-intensive applications in the context of ubiquitous computing. This contribution relies ...
  • LCMOS: Light-powered standard CMOS circuits 

    Madrenas Boadas, Jordi; Fernández Martínez, Daniel; Wang, Chunyan (2012)
    Conference report
    Restricted access - publisher's policy
    LCMOS, a harvest-use light-powered scheme for standard CMOS circuits based on photogenerated currents in the drain-substrate PN junction of both PMOS and NMOS transistors is introduced. PMOS and NMOS bulks are ...
  • Optimization of parameters for CMOS MEMS resonant pressure sensors 

    Banerji, Saoni; Madrenas Boadas, Jordi; Fernández Martínez, Daniel (Institute of Electrical and Electronics Engineers (IEEE), 2015)
    Conference report
    Restricted access - publisher's policy
    Micro machined resonant pressure sensors have rapidly grown into a major type of MEMS products over the past two decades. This paper presents the mathematical modelling of squeeze film damping in a MEMS resonant pressure ...