Abstract:
A method manufactures a single electron transistor device by electro-migration of nanocluster wherein said nanoclusters are metallically passivated and forced to assembly over a lithographic patterned substrate under control of a non homogeneous electric field at room temperature. A controlled migration and the desired location of the metallic passivated nanoclusters are based on a dielectrophoretic process.
Abstract:
A method of controlling a flyback DC-DC converter includes using a primary control loop to monitor an auxiliary winding of a transformer for determining the amount of energy being transferred to a load. The voltage in the auxiliary winding is induced by current flowing in the secondary winding of the transformer. The primary control loop disables and enables the turning on of a power switch for driving the primary winding of the transformer, and detects the zero-crossing. The duration that the power switch is turned on is established by a secondary control loop using the output voltage for turning off the power switch for a new off phase. The flyback DC-DC converter further includes a fixed frequency oscillator having a frequency lower than the self-oscillating frequency of the converter. The power transferred from the primary circuit to the secondary circuit of the flyback transformer is controlled by introducing a delay on the turn-on instant of the power switch. This is with respect to a turn-on command generated during a self-oscillating functioning phase regardless of the mode of control of the converter. The turn-on command is based upon a zero crossing, a fixed frequency functioning phase, a rising edge of the signal generated by the oscillator, and as a function of the input variables of the primary and secondary control loops.
Abstract:
The system can be used for the automatic analysis of images, including a matrix of spots, such as images of DNA microarrays after hybridization. The system can be associated—and preferably integrated in a single monolithic component implementing VLSI CMOS technology—to a sensor for acquiring the images. The system includes a circuit for processing the signals corresponding to the images, configured according to a cellular neural network (CNN) architecture for the parallel analogue processing of signals.
Abstract:
The invention is directed to a microdevice for containing electrically coupled cells while allowing their growth that allows the addition or removal of cells from their containment by providing an actuatable gate. When the gate is actuated, for example with electric current, the cells may be added or removed from their containment. The invention may be applied to a neurochip or any device for growing cells in a defined spatial arrangement. This Abstract is provided to comply with rules requiring an Abstract that allows a searcher or other reader to quickly ascertain subject matter of the technical disclosure. This Abstract is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims, 37 CFR 1.72(b).
Abstract:
A neuro-fuzzy integrated architecture which permits on-line self-training includes at least one microcontroller of the fuzzy type dedicated to fuzzy rules computing and integrated monolithically on a semiconductor together with a non-volatile memory. Also included within the same integrated circuit are a microprocessor, a volatile memory unit, and an arbiter block linked to a bus interconnecting the fuzzy microcontroller, the microprocessor, and the volatile memory unit. The arbiter block controls access to the memory unit by the microprocessor or the fuzzy microcontroller. An additional fuzzy co-processor may be connected between the fuzzy microcontroller and the microprocessor for performing the fuzzy logic operations.
Abstract:
The method for authentication and electronic signature is of the private-key, challenge and response type between a user requesting an authorization, via, for example, a smart card and a controller—check terminal—supplying the authorization. To increase security of the authorization or authentication operations, the smart card comprises a chaotic generator generating user's acknowledgement code, which is compared with a comparison code generated by the check terminal using a chaotic generator which is the same.
Abstract:
A method realizes a thin film organic electronic device integrated on a substrate and includes an organic material layer and an organic thin film transistor or OTFT transistor. The method comprises: depositing the organic material layer on the substrate, the organic material layer being a conductive organic polymer; patterning by a soft-lithographic procedure the organic material layer to create a reduced portion in order to make a channel area of the OTFT transistor; masking the organic material layer by covering with a cover mask a source area and a drain area of the OTFT transistor; irradiating by ultraviolet radiation to deactivate exposed portions of the organic material layer defining the source area, the drain area and the channel area; depositing on the organic material layer a semiconductor layer; and creating on the semiconductor layer a gate area of the OTFT transistor.
Abstract:
Described herein is an optically controlled electrical-switch device which includes a first current-conduction terminal and a second current-conduction terminal, and a carbon nanotube connected between the first and the second current-conduction terminals, the carbon nanotube being designed to be impinged upon by electromagnetic radiation and having an electrical conductivity that can be varied by varying the polarization of the electromagnetic radiation incident thereon. In particular, the carbon nanotube may for example, in given conditions of electrical biasing, present a high electrical conductivity when it is impinged upon by electromagnetic radiation having a given wavelength and a polarization substantially parallel to the axis of the carbon nanotube itself, and a reduced electrical conductivity when it is impinged upon by electromagnetic radiation having a given wavelength and a polarization substantially orthogonal to the axis of the carbon nanotube itself.
Abstract:
Described herein is an optically controlled electrical-switch device which includes a first current-conduction terminal and a second current-conduction terminal, and a carbon nanotube connected between the first and the second current-conduction terminals, the carbon nanotube being designed to be impinged upon by electromagnetic radiation and having an electrical conductivity that can be varied by varying the polarization of the electromagnetic radiation incident thereon. In particular, the carbon nanotube may for example, in given conditions of electrical biasing, present a high electrical conductivity when it is impinged upon by electromagnetic radiation having a given wavelength and a polarization substantially parallel to the axis of the carbon nanotube itself, and a reduced electrical conductivity when it is impinged upon by electromagnetic radiation having a given wavelength and a polarization substantially orthogonal to the axis of the carbon nanotube itself.
Abstract:
A sensor having an array of photo sensitive elements for acquiring images of the passenger compartment in a motor vehicle and a circuit for processing the signals corresponding to the images generated by said photo sensitive elements. The processing circuit is configured according to a cellular neural network processing architecture of the image signals and can generate an output signal indicating the decision on whether to deploy an airbag to which the sensor is associated or to control the explosion of the airbag. Preferably, the photo sensitive array and the processing circuit are comprised on a single integrated component, preferably implementing CMOS technology.