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Specific patent-protected technology produced at the IMSE-CNM during the course of research activities is listed below. Collaboration between IMSE-CNM and interested companies may be established either through development agreements with a licensing options, or through licenses for commercial exploitation.

Implantable neural recording channel with on-the-fly data compressing mechanism
Inventors: Manuel Delgado Restituto; Alberto Rodríguez Pérez; Ángel Rodríguez Vázquez
Applicants: Universidad de Sevilla, CSIC
Priority number: 201431253
Priority date: 25.08.2014
[resumen]
A Spanish public research organisation (CSIC), in collaboration with the Universidad de Sevilla, has developed a sensor system for the acquisition, digitization and processing of neural signals recorded by an intracranial microelectrode. The system also comprises the methods and means for real-time data compression which make it possible to obtain a simplified representation of the action potentials detected.

Highly energy efficient widely programmable transconductor
Inventors: Alonso Morgado García de Polavieja; Rocío del Río Fernández; José M. de la Rosa Utrera
Applicants: Universidad de Sevilla, CSIC
Priority number: 201400697
Priority date: 25.08.2014  
[abstract]
The Universidad de Sevilla, in collaboration with CSIC, has developed a novel transconductor, which is widely tunable and reconfigurable to a number of circuit specifications with an adaptive power consumption. Current-starving techniques are combined with programmable output stages so that the output current range and granularity can be arbitrarily set, while increasing energy efficiency with the number of active stages.
These characteristics make the proposed circuit very suited to enlarge the autonomy and battery life in a number of portable multi-mode electronic devices, including –among others– the following applications:
  • Wireless communication systems, including next-generation 4G/5G mobile telecom terminals.
  • Software-defined-radio devices.
  • Instrumentation.
  • Wireless smart sensors.
  • Biomedical devices.
  • Ultra-low-voltage devices.

Bioimpedance measurement system for wirelessly monitoring cell cultures in real time, based on an oscillation test using integrated circuits
Inventors: Gloria Huertas Sánchez, José Andrés Maldonado Jacobi y Alberto Yúfera García
Applicants: Universidad de Sevilla
Priority number: 201400682
Priority date: 06.08.2014
[abstract]
The invention relates to a novel bioimpedance measurement system for wirelessly monitoring cell cultures in real time. The system uses electrodes as bioimpedance sensors and implements a "biological oscillator" circuit for measurement with integrated circuits. The invention uses oscillation parameters (frequency, amplitude, phase etc.) as empirical markers for carrying out a suitable interpretation in terms of identification of cell size, cell count, cell growth, growth rate, etc.

Bioimpedance measuring system for wirelessly monitoring cell cultures in real time, based on CMOS circuits and electrical modelling
Inventors: Alberto Olmo Fernández, Gloria Huertas Sánchez y Alberto Yúfera García
Applicants: Universidad de Sevilla
Priority number: 201400401
Priority date: 13.05.2014
[abstract]
The invention relates to a novel bioimpedance measuring system for wirelessly monitoring cell cultures in real time. The system uses a two-dimensional (2D) array of electrodes as bioimpedance sensors and implements the measuring circuit with CMOS technology, using electrical modelling for image reconstruction.

System and method for acquisition and transferring neuronal activity
Inventors: Manuel Delgado Restituto; Alberto Rodríguez Pérez; Ángel Rodríguez Vázquez
Applicants: CSIC, Universidad de Sevilla
Priority number: 201430390
Priority date: 20.03.2014
[abstract]
The invention relates to a system for acquiring and transferring neuronal activity, comprising at least one plurality of bio-electrical sensors, a wireless transceiver, a communications node connected between the plurality of bio-electrical sensors and the wireless transceiver, and a plurality of intra-cranial electrodes, said communications node being designed to bi-directionally transmit data between the plurality of bio-electrical sensors and the wireless transceiver, such that, in the direction of data transmission from the wireless transceiver to the bio-electrical sensors, the communications node processes a parameter setting, a calibration and an operating mode of the bio-electrical sensors, and, in the direction of data transmission from the bio-electrical sensors; to the wireless transceiver, the communications node collects, serially arranges and forms neuronal information from a neuronal signal captured by the plurality of bio-electrical sensors.

Device for the simultaneous generation of high-quality identifiers and true random numbers from semiconductor memories (SRAMs)
Inventors: Iluminada Baturone Castillo; Susana Eiroa Lorenzo; Miguel Ángel Prada Delgado
Applicants: Universidad de Sevilla, CSIC
Priority number: 201400225
Priority date: 20.03.2014
[abstract]
Microelectronic device that can generate simultaneously high-quality identifiers and true random numbers from the start-up values of semiconductor memories that use bistable latching cells (such as SRAMs). The identifiers generated are unique of that memory. Experimental results has shown that the method reduces the length of the identifiers in up to 45% with the same identification capability and the bits required to obtain full entropy can be reduced in 78%. The method may be applied to standard digital designs and carried out by the final user, without the need of complex laboratory set-ups.

CMOS image sensor with on-chip integral image computation
Inventors: Jorge Fernández Berni, Ángel Rodríguez Vázquez, Rocío del Río Fernández, Ricardo Carmona Galán
Applicants: Universidad de Sevilla, CSIC
Priority number: 201400224
Priority date: 20.03.2014
[abstract]
The invention relates to mixed-signal hardware for computing the integral image in the focal plane using a cluster of basic sensor-processing cells, the interconnection of which cluster can be reconfigured using peripheral circuitry that permits a processing task, that is very useful in artificial vision, to be very efficiently carried out, such as the calculation of the integral image in settings, such as, inter alia, monitoring natural spaces, robotics, and aiding unmanned air navigation. The scientific-technical field of the invention is that of physical technologies, in particular microelectronics. The general application framework of the invention is that of very low power consumption electronic systems designed to carry out artificial vision tasks, namely capturing images, analysing same, and acting if required by the results of said analysis.

Automatic sensor calibration system for the remote monitoring of electric biopotentials
Inventors: Manuel Delgado Restituto; Jesús Ruiz Amaya; Alberto Rodríguez Pérez; José A. Rodríguez Rodríguez; Jens Masuch
Applicants: CSIC
Priority number: 201331419
Priority date: 18.10.2013
[abstract]
Low cost system for the calibration of front-ends for the acquisition and signal conditioning of bioelectrical sensors which is able to adjust the frequency transfer characteristic and the voltage gain level of the captured biopotential before its conversion to digital domain. The calibration system is autonomous, suitable for monolithic integration and has little impact on the form factor of the sensor.

Crypto-biometric device for real-time human recognition at any object
Inventors: Rosario Arjona López; Iluminada Baturone Castillo
Applicants: Universidad de Sevilla, CSIC
Priority number: 201300721
Priority date: 31.07.2013
[abstract]
A microelectronic device that provides real-time human recognition from a fingerprint image. The device extracts a feature vector from the fingerprint image that allows fingerprint classification, indexing, and recognition. In addition, the method offers protection of the stored template and allows generating cryptographic keys, which increases the device security.

Improved dynamic vision sensor (DVS) device
Inventors: Teresa Serrano Gotarredona; Bernabé Linares Barranco
Applicants: CSIC
Priority number: 201231921
Priority date: 11.12.2012
[abstract]
DVS device with greater contrast sensitivity, lower production cost, lower power consumption requirements, and, in general, better performance than current DVS ones. System improvement is due to the incorporation of a transimpedance circuit for low power and low mismatch which provides amplification of the voltage coming from the photo current conversion. Best performance of the device makes it especially useful in applications which require low power, high speed, and complex information processing such as robotics, automated driving of vehicles, aircraft and surveillance among others.

High-precision temperature-to-digital converter with low power consumption
Inventors: Manuel Delgado Restituto; Jesús Ruiz Amaya; Alberto Rodríguez Pérez; José A. Rodríguez Rodríguez; Jens Masuch
Applicants: CSIC
Priority number: 201231603
Priority date: 18.10.2012
[resumen]
The invention relates to a high-precision temperature-to-digital converter with low power consumption. The power is obtained from wireless waves. The invention also relates to a method for measuring the temperature associated with the converter. The converter comprises a thermistor, the resistance of which depends on the temperature; two resistors; an integration capacitor which are temperature invariable; and a reading and conversion circuit that measures the resistance of the thermistor and converts said value representative of the temperature into a digital code for subsequent processing. The method comprises fours steps such that the resistance of the thermistor is proportional to an expression dependent on the temperature.

Image processor for key points detection at the focal plane
Inventors: Jorge Fernández Berni; Ricardo Carmona Galán; Ángel Rodríguez Vázquez
Applicants: CSIC, Universidad de Sevilla
Priority number: 201201011
Priority date: 08.10.2012
[abstract]
Hardware device for detecting local extrema of an image. Processing is done at the focal plane by using mixed-signal circuitry (analog and digital). To this end, and by comparison of the neighboring pixel voltages representing the value of each pixel, the device determines the existence of local maxima and minima prior to downloading the image from the sensor. The resulting time and energy savings enables develop autonomous vision devices with low power consumption.

Wireless telemetry system for the monitoring of static and dynamic magnitudes
Inventors: Manuel Delgado Restituto; José A. Rodríguez Rodríguez; Jesús Ruiz Amaya; Alberto Rodríguez Pérez; Jens Masuch
Applicants: CSIC
Priority number: 201231201
Priority date: 26.07.2012
[abstract]
The invention relates to a wireless range-finding system based on the transmission of a time-based references for the monitoring of static and dynamic variables. The system comprises a read instrument and at least one transponder, in turn including transducers associated with the variables being observed and/or measured. In order to communicate the read instrument and the transponder, the system also comprises a mechanism for transmitting information relating to the internal operating frequency of the transponder to the read instrument, and a method for remotely determining the internal operating frequency of the transponder. The red instrument comprises: an antenna, a communication section, a signal processing section, a computation section, a temperature-stable timing unit, a user interface section and a data output section.

Wireless battery-free biomedical signal monitoring patch
Inventors: Manuel Delgado Restituto; José A. Rodríguez Rodríguez; Jesús Ruiz Amaya; Alberto Rodríguez Pérez; Jens Masuch
Applicants: CSIC
Priority number: 201231201
Priority date: 26.07.2012
[abstract]
System for the remote monitoring of physiological patterns, such as temperature and heart rate, without decreasing the mobility or comfort of the patient. The system comprises a reader instrument, for enabling the measure procedure and processing the received information; and patch transponders, singled out with individual identifiers, for capturing and wirelessly transmitting sensory data. The system, based on passive RFID technology combined with transmitted time reference strategies, does not require tags to be supplied from primary batteries, exhibits a wireless coverage in the order of meters and offers the ability to measure different physical quantities simultaneously.

Universal controller and virtual sensor
Inventors: Antonio Acosta Jiménez; Iluminada Baturone Castillo; Javier Castro Ramírez; Carlos J. Jiménez Fernández; Piedad Brox Jiménez; Macarena Martínez Rodríguez
Applicants: CSIC, Universidad de Sevillae
Priority number: 201200608
Priority date: 04.06.2012
[abstract]
Method to provide the generation of digital circuits that implement multivariable Piece-Wise Affine (PWA) functions without approximations. These circuits offer a high performance in terms of area, speed, and power. The method presents two additional features: programmability and re-configurability. Both characteristics allow the implementation of several functions in the same integrated circuit, generating devices that could integrate the requirements of any controller or virtual sensor easily

Converter from instant to dynamic synapses in pulsed neural networks
Inventors: Teresa Serrano Gotarredona; Bernabé Linares Barranco
Applicants: CSIC
Priority number: 201230702
Priority date: 10.05.2012
[abstract]
System that allows pulse processing with dynamic integration synapses into simple neural integrated circuits such as with the instant integration ones. The system is based on the incorporation of an event scheduler block which spaces the pulses received by the neurons. In this way the contribution of the pulses is not instantaneous avoiding that neurons take precipitated and erroneous activation decisions.

Image enhancement processor based on edge detection and anisotropic diffusion
Inventors: Jorge Fernández Berni; Ángel Rodríguez Vázquez; Ricardo Carmona Galán
Applicants: CSIC, Universidad de Sevilla
Priority number: 201200474
Priority date: 03.05.2012
[abstract]
Hardware device that enables, using mixed-signal circuitry, image improvement by means of edge detection and smoothing of homogeneous areas. In order to do this, each pixel is represented by a voltage value proportional to the light intensity at that point and subsequently compared with the voltage values of neighboring pixels. The elementary in-pixel circuits have low power consumption. This enables developing power-efficient artificial vision systems with applications in robotics, surveillance and navigation aids among others.

3D-Image processor for feature detection
Inventors: Ángel Rodríguez Vázquez; Fernando R. Pardo Seco; Manuel Suárez Cambre; Ricardo Carmona Galán; Victor M. Brea Sánchez
Applicants: Universidad de Santiago de Compostela, CSIC, Universidad de Sevilla
Priority number: 201200090
Priority date: 01.02.2012
[abstract]
Hardware device that enables integration of all the elements of an artificial vision system into a single chip. The implementation of the chip into a vertical integration processing architecture, also known as 3D CMOS, enables in real time processing while maintaining a practical image size. This system represents an alternative to the high computational cost of already known image processing techniques. Autonomous systems based on this chip are useful in robotics, medical and aeronautics applications among others.

Magneto-electrical connection for loopback applications in integrated transceivers
Inventors: Manuel J. Barragán Asián; José L. Huertas Díaz; Eduardo Peralías Macías
Applicants: CSIC, Universidad de Sevilla
Priority number: 201132116
Priority date: 28.12.2011
[abstract]
Improved loopback test method for integrated RF transceivers. The improvement is based on the use of a novel magneto-electric sensor. The sensor is composed of a magneto-electric transducer and a signal conditioning module, and enables a connection between the transmitter and receiver circuits comprising the integrated RF transceiver to test. The presented sensor implements test strategies that require no modifications to the transceiver and can be performed during normal system operation.

RF transceivers test in integrated circuit
Inventors: José L. Huertas Díaz; Manuel J. Barragán Asián
Applicants: CSIC, Universidad de Sevilla
Priority number: 201131109
Priority date: 30.06.2011
[abstract]
The main objective of this invention is to provide a system and a reliable and rapid method for rejecting defective integrated transceivers at the wafer level by establishing wireless links between different circuits in the wafer such that the signals needed to test a particular transceiver are provided or read by another one of the transceivers in the same wafer. For this purpose, the system uses a low-frequency digital test apparatus which at least comprises two test needles for sending, receiving and comparing test data sequences which are interchanged between the test apparatus and the integrated circuits in the wafer.

Low-mismatch and low-consumption transimpedance gain circuit for temporally differentiating photo-sensing systems in dynamic vision sensors
Inventors: Teresa Serrano Gotarredona; Bernabé Linares Barranco
Applicants: CSIC
Priority number: 201130862
Priority date: 26.05.2011
[abstract]
The invention relates to a low-mismatch and low-consumption transimpedance gain circuit for temporally differentiating photo-sensing systems in dynamic vision sensors, which uses at least one photodiode and at least two in-series transistors, each of the transistors being connected in diode configuration and being positioned at the output of the photodiode. The output current from the photodiode flows through the drain-source channels of the transistors and the source of the last transistor in series is connected to a voltage selected from earth voltage, a constant voltage or a controlled voltage.

Adaptive method for concurrent digital calibration of the offset in comparators in analog-to-digital converters (ADCs)
Inventors: Antonio J. Ginés Arteaga; Eduardo Peralías Macías; Adoración Rueda Rueda
Applicants: CSIC, Universidad de Sevilla
Priority number: 200930175
Priority date: 14.05.2009
[abstract]
The invention relates to an adaptive method for calibrating the offset of comparators in analog-to-digital converters (ADCs). The technique used enables the effective threshold voltage or transition of the comparators to be adjusted by means of a low-cost digital control, without affecting the natural path of the signal, and therefore without interrupting the AlD conversion of the analog input. Said method is therefore a concurrent calibration technique.

Adaptive method for estimating the INL in analog-to-digital converters (ADCs)
Inventors: Antonio J. Ginés Arteaga; Eduardo Peralías Macías; Adoración Rueda Rueda
Applicants: CSIC, Universidad de Sevilla
Priority number: 200930172
Priority date: 14.05.2009
[abstract]
The invention relates to a low-cost digital method for estimating the integral non-linearity (INL) in analog-to-digital converters. Said method is valid for the testing and characterisation of any analog-to-digital conversion topology in both concurrent and non-concurrent built-in self-test BIST applications.

Charge-amplifier electronic circuit
Inventors: Juan Ramos Martos
Applicants: CSIC
Priority number: 200302363
Priority date: 10.10.2003
[abstract]
The invention relates to an electronic circuit and to the use thereof in charge amplifiers, such as to provide continuous stabilisation from the operating point thereof. The invention is particularly suitable for integrated circuits in which the provision ofhigh-value resistors is costly in terms of area and introduces significant interferences. The inventive circuit demonstrates that it is possible to construct resistors of more than 100 gigaohms. The invention can be used in the following specific fields: microelectromechanical capacitive sensors, piezoelectric and optical transducers, and for any application that requires the measurement of the accumulated charge or the integration of electric current. The invention can also be used in integrated circuits which require very large time constants, such as analog filters or integrators.

Device and method for measuring parameters of periodic oscillatory signals
Inventors: Diego Vázquez García de la Vega; Gildas Léger; Gloria Huertas Sánchez; José L. Huertas Díaz
Applicants: CSIC, Universidad de Sevilla
Priority number: 200102560
Priority date: 19.11.2001
[abstract]
The invention relates to a device and method for measuring parameters of periodic oscillatory signals. Said device comprises a sigma-delta modulator and a zero-crossing detector. The inventive method employs the aforementioned device and comprises the following steps: a) the periodic oscillatory signal, of which the parameters are to be measured, is introduced into the sigma-delta modulator and into the zero-crossing detector; b) said signal is coded in the sigma-delta modulator into pulses of ones and zeros and a synchronisation signal is generated using the zero-crossing detector; and c) the signals obtained in step b) are processed in a synchronised manner using digital processing circuits. The invention is suitable for use in the field of analogue and mixed integrated circuits. More specifically, the invention can be used to evaluate and test analogue signals by extracting oscillatory parameters using digital technology.

Circuitry for introducing initial conditions into systems based on operational amplifiers
Inventors: Diego Vázquez García de la Vega; Gloria Huertas Sánchez; José L. Huertas Díaz
Applicants: CSIC
Priority number: 200100996
Priority date: 27.04.2001
[abstract]
The invention relates to a method and circuitry used to accelerate the start-up of oscillators and to reduce the transient required to reach the stationary state. Although the invention is particularly suitable for oscillators, it can also be used for any type of circuit with operational amplifiers, both linear and non-linear, and, in particular, through the use of a modified amplifier, known as 'sw-opamp'. Said amplifier can operate as a normal amplifier or as a buffer according to a digital control signal. The sw-opamp is used in buffer mode together with an appropriate DC level to initialise the circuit at the desired and/or suitable point in order start up the circuit.

Circuit for recognition and categorization of binary patterns
Inventors: Teresa Serrano Gotarredona; Bernabé Linares Barranco
Applicants: CSIC
Priority number: 9401031
Priority date: 13.05.1994
[abstract]
The object of the invention is a circuit for the recognition and establishment of categories of binary patterns, capable of grouping by similarity a collection of binary patterns presented sequentially and/or iteratively at the circuit inputs. The circuit of the invention has the advantage of greater speed compared with software algorithms that perform similar functions and is less complex than other hardware-based solutions. The circuit is useful in speech recognition devices, as well as in robotics and process automation.

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