Abstract: Device comprising a first input configured to receive a first input signal of given wavelength, several distinct pairs of outputs, the two outputs of each pair of outputs being configured to deliver a differential output signal, and an electrically conducting transmission means forming a closed circuit and coupled between the first input and the outputs, at least one length of the portion of the transmission means, coupled between two outputs of a pair of outputs, being substantially equal to an even multiple of a quarter of the said wavelength, the lengths of those portions of the transmission means which couple two homologous outputs of two pairs of outputs being substantially equal, and at least one length of the portion of the transmission means, coupled between the first input and the output closest to the said first input, being substantially equal to a quarter of the said wavelength.

Abstract: A controller is provided for DC-DC converters of the type associated with a half-bridge driving stage of at least one inductive load, with a pair of power MOS transistors in Highside and Lowside configuration being driven by a corresponding converter. The controller includes an input for connection to a terminal of the inductive load. The controller also includes a read block for reading an inductive load phase current at the terminal, an over current comparator having a first input coupled to an output of the read block, and a bypass compensation network including an error amplifier block having a first input coupled to the terminal through a voltage divider, and a second input coupled to a reference potential. The compensation network has an output that is coupled to a second input of the over current comparator, and an output of the over current comparator is supplied to the DC-DC converter.

Abstract: A process for manufacturing an electronic semiconductor device, wherein a SOI wafer is provided, formed by a bottom layer of semiconductor material, an insulating layer, and a top layer of semiconductor material, stacked on top of one another; alignment marks are formed in the top layer; an implanted buried region is formed, aligned to the alignment marks; a hard mask is formed on top of the top layer so as to align it to the alignment marks; using the hard mask, the top layer is selectively removed so as to form a trench extending up to the insulating layer; there a lateral-insulation region in the trench, that is contiguous to the insulating layer and delimits with the latter an insulated well of semiconductor material; and electronic components are formed in the top layer.

Abstract: A process for forming a wire portion in an integrated electronic circuit includes epitaxially growing the wire portion on a side surface of a seed layer portion (11, 12). Cross-sectional dimensions of the wire portion correspond to a thickness of the seed layer portion and to a duration of the growing step. The seed layer portion is then selectively removed while the wire portion is retained fixedly on the circuit. Afterwards, heating of the circuit can cause the wire portion becoming rounded in cross-section. The wire portion obtained may be about 10 nanometers in diameter. It may be used for forming a channel of a MOS transistor devoid of short channel effect.

Abstract: The invention relates to a method for the COFDM demodulation of a signal received from a transmission channel. The inventive method includes performing the fast Fourier transform of the signal received in a window corresponding to a symbol, each symbol being associated with a guard time reproducing one part of the symbol; supplying a set of estimated values for the module impulse response; determining coefficients, each coefficient being obtained from the product of the aforementioned set and a filtering function (FE) for a determined relative position of the filtering function in relation to the set; determining the maximum coefficient and the corresponding relative position; and positioning the window as a function of the relative position, the filtering function including a central part (LMAX) which has a constant amplitude and a duration equal to the duration of the guard time and which is surrounded by non-zero decreasing edges.

Abstract: A method comprises providing a bottom electrode, depositing, on the bottom electrode, an active material comprising a first structural portion having an absorption peak at a UV wavelength, wherein such first structural portion is photo-activatable at such wavelength and which is constituted by monomers or oligomers that, when irradiated at said wavelength, undergo a photo-polymerization and/or photo-cross-linking reaction, or constituted by a polymer that at a UV wavelength undergoes a photo-degradation reaction, and a second electrically active or activatable structural portion which is substantially transparent to such predetermined UV wavelength; exposing a portion of the active material, through a photomask, to UV radiation having such UV wavelength, with photo-activation of the exposed portion of such film; selectively removing either the exposed photo-activated portion or the non-exposed portion, with exposure of a respective portion of the bottom electrode; depositing a head electrode.

Abstract: The quality of music output from audio systems is improved by simulating the effect of low frequency signals in the human ear. This thus allows listeners to perceive the lower frequency signals, even though the speakers may be incapable of providing such low frequency outputs. A method is provided for processing enhancing bass effect in audio signals. The method also results in the bass enhancement being computationally less intensive. The bass effect enhancement techniques are based on the response of sine and cosine transfer functions and on the directional independence of low frequency components. The human ear is unable to resolve directions from low frequency components. The bass effect enhancement technique alternatively is based on response of an exponential transfer function.

Abstract: A display screen is controlled through successive scans of the display screen. Each scan of the display screen includes a successive selection of rows of the display screen. For each row selected, and in accordance with a normal selection, a first column selection mode is implemented wherein a first selection signal is generated for the column, that first selection signal going from a first state towards a second state with an intermediate plateau level therebetween. In an alternative operation, a second column selection mode is provided which replaces the first column selection mode, the second column selection mode including the generation of a second selection signal going from the first state to the second state without any intermediate plateau level. At least at the start of each scan, the first selection mode is replaced by the second selection mode and this second selection mode is maintained for a given column, at the latest, for as long as no deselection of the column has been effected.

Abstract: Collisions between tunneled direct link setup (“TDLS”) requests are resolved by associating each request with a priority value. Upon issuing a TDLS request the encapsulated frame is associated with a priority value. When a station, which is waiting for a response from a recently issued TDLS request, receives a TDLS request from another station, a collision occurs. The collision is resolved by comparing the priority value associated with the TDLS request initiated by the station and the TDLS request received. The TDLS request with the higher priority value is pursued while the TDLS request with the lower priority value is ignored. The priority value can be based on the sending station's MAC address or other value which can differentiate the TDLS requests.

Abstract: A fractional-type phase-locked loop circuit is proposed for synthesizing an output signal multiplying a frequency of a reference signal by a fractional conversion factor, the circuit including means for generating a modulation value, means for generating a feedback signal dividing the frequency of the output signal by a dividing ratio, the dividing ratio being modulated according to the modulation value for providing the conversion factor on the average, means for generating a control signal indicative of a phase difference between the reference signal and the feedback signal, means for controlling the frequency of the output signal according to the control signal, and means for compensating a phase error caused by the modulation of the dividing ratio; in the circuit of an embodiment of the invention, the means for compensating includes means for calculating an incremental value, indicative of an incremental phase error, according to the conversion factor and the modulation value, means for calculating a corr

Abstract: The method for encoding and/or decoding video signals, includes the operations of generating at a transmitter side a multiple descriptions vector associated to a pixel values vector of the video signals and decoding at a receiver side available descriptions vector for reconstructing the pixel values vector. The operation of generating a multiple descriptions vector includes the steps of obtaining the pixel values vector by selecting a group of pixels in a picture of the video signal and applying an encoding matrix to the pixel values vector. The decoding operation includes the step of applying a decoding matrix that is in an inverse relationship with the encoding matrix to the available descriptions vector to obtain the pixel values vector.

Abstract: A finFET field effect transistor is produced by the formation of an electrical junction between the thin fin portion of semiconductor material which forms the channel of the transistor and the circuit substrate. Doping particles are implanted in the substrate through a mask which is then subsequently used to form the thin fin portion of the channel. The channel of the finFET transistor is thus electrically insulated from the circuit substrate in the same manner as in MOS integrated circuits realized from bulk silicon substrates.

Abstract: A dual-conversion tuner firstly upconverts so as to place itself outside the receive band and then downconverts with zero intermediate frequency. A filter of the surface acoustic wave type is disposed between the two frequency transposition stages of the tuner. After baseband filtering, the signals are digitized then processed in a digital block comprising a channel decoding module. With the exception of the surface acoustic wave filter, the components are entirely embodied in integrated fashion.

Abstract: A method and a system for transferring a digital signal through a transformer, including a circuit for coding the digital signal to be transferred, having two outputs connected to the respective ends of a primary winding of the transformer, and a circuit for decoding the current in a secondary winding of the transformer generating a rising, respectively falling edge, of an output signal according to the direction of detected current pulses.

Abstract: PSF coding has become well known in recent years. Although it enables significant increases in the depth of field, defocus introduces artifacts in images that are a major detraction from the final image quality. A method is described that enables the deduction or defocus and consequently the removal of these artifacts. The principle of the disclosed techniques involves iteratively adjusting the restoration algorithm according to a chosen image metric and choosing the defocus parameter that yields the image the lowest level of artifact.

Abstract: The errors that may occur in transmitted numerical data on a channel affected by burst errors, are corrected via the operations of: ordering the numerical data in blocks each comprising a definite number of data packets; generating for each block a respective set of error-correction packets comprising a respective number of correction packets, the respective number identifying a level of redundancy for correcting the errors; and modifying dynamically the level of redundancy according to the characteristics of the bursts and of the correct-reception intervals between two bursts. Preferential application is on local networks, such as W-LANs for use in the domestic environments.

Abstract: A method of sensing the air/fuel ratio in a combustion chamber of an internal combustion engine that may be easily implemented by a respective low-cost device includes a pressure sensor and a learning machine that generates a sensing signal representing the air/fuel ratio by processing the waveform of the pressure in at least one cylinder of the engine. In practice, the learning machine extracts characteristic parameters of the waveform of the pressure and as a function of a certain number of them generates the sensing signal.

Abstract: An amplifier having at least one switch controlled by an output voltage of a hysteresis block, wherein the hysteresis block is adapted to receive an input voltage signal based on an integration of an error signal, a low threshold voltage and a high threshold voltage, and is arranged to change the output voltage from a first value to a second value when the input voltage signal is higher than the high threshold voltage and to change the output voltage from the second value to the first value when the input voltage signal is lower than the low threshold voltage, and wherein the low threshold voltage is equal to Vref??VDD and the high threshold voltage is equal to Vref+?VDD, where Vref is a common mode voltage level, ? is a non-zero constant, and VDD is a power supply voltage.

Abstract: A device for decoding a direct sequence spread spectrum-encoded binary message includes a sampler that captures at least one sequence of binary samples corresponding to one bit of the transmitted message. The captured sequence of samples are applied to a filter matched to the spreading code used, thus making it possible to delete the spreading applied to the original message. The device further includes, at the output of the sampler, an error correction block including a memory storing a plurality of binary sequences corresponding to all of the possible values for a captured sequence of samples. A replacement circuit replaces the captured sequence of samples with the stored sequence, thereby minimizing the number of samples different from the captured sequence of samples, and allowing the stored sequence to be applied to the matched filter.

Abstract: The invention relates to a device consisting of an electromechanical microswitch comprising mobile beam (2). According to the invention, at least part (14) of the beam forms the piezoelectric element of a piezoelectric actuator.