• A multiplexing architecture for mixed-signal CMOS fuzzy controllers 

      Vidal-Verdu, Fernando; Navas-Gonzalez, Rafael Jesus; Rodríguez Vázquez, Angel (Institution of Engineering and Technology, 1998)
      Limits to precision impose limits to the complexity of analog circuits, hence fuzzy analog controllers are usually oriented to fast low-power systems with low-medium complexity. This paper presents a strategy to preserve ...
    • A Modular Programmable CMOS Analog Fuzzy Controller Chip 

      Rodríguez Vázquez, Angel; Navas González, Rafael Jesús; Delgado Restituto, Manuel; Vidal-Verdu, Fernando (IEEE Circuits and Systems Society, 1999)
      We present a highly modular fuzzy inference analog CMOS chip architecture with on-chip digital programmability. This chip consists of the interconnection of parameterized instances of two different kind of blocks, namely ...
    • Three Realizations and Comparison of Hardware for Piezoresistive Tactile Sensors 

      Vidal-Verdu, Fernando; Oballe-Peinado, Oscar; Sánchez Durán, José A.; Castellanos Ramos, Julián; Navas González, Rafael Jesús (MDPI, 2001-03-17)
      Tactile sensors are basically arrays of force sensors that are intended to emulate the skin in applications such as assistive robotics. Local electronics are usually implemented to reduce errors and interference caused by ...
    • Neuro-fuzzy chip to handle complex tasks with analog performance 

      Navas González, Rafael Jesús; Rodríguez Vázquez, Angel; Vidal-Verdu, Fernando (IEEE Computational Intelligence Society, 2003)
      This paper presents a mixed-signal neuro-fuzzy controller chip which, in terms of power consumption, input–output delay, and precision, performs as a fully analog implementation. However, it has much larger complexity ...
    • Tactile Sensors Based on Conductive Polymers 

      Macicior, Haritz; Sikora, Tomasz; Ochoteco, Estíbalitz; Castellanos Ramos, Julián; Navas González, Rafael Jesús; [et al.] (Springer Berlin / Heidelberg, 2010)
      This paper presents results from a selection of tactile sensors that have been designed and fabricated. These sensors are based on a common approach that consists in placing a sheet of piezoresistive material on the top ...
    • A large area tactile sensor patch based on commercial force sensors 

      Barquero, María José; Castellanos-Ramos, Julián; Sánchez-Durán, José A.; Serón, Javier; Vidal-Verdu, Fernando; [et al.] (MDPI, 2011)
      This paper reports the design of a tactile sensor patch to cover large areas of robots and machines that interact with human beings. Many devices have been proposed to meet such a demand. These realizations are mostly ...
    • Insights into the Mechanical Behaviour of a Layered Flexible Tactile Sensor 

      Castellanos Ramos, Julián; Navas González, Rafael Jesús; Fernández, Iván; Vidal-Verdu, Fernando (MDPI Open Access Journal, 2015)
      This paper shows realizations of a piezoresistive tactile sensor with a low cost screen-printing technology. A few samples were fabricated for different materials used as insulator between the conductive layers and as top ...