Abstract:
An integrated power MOSFET device formed by a substrate); an epitaxial layer of N type; a sinker region of P type, extending through the epitaxial layer from the top surface and in electrical contact with the substrate; a body region, of P type, extending within the sinker region from the top surface; a source region, of N type, extending within the body region from the top surface, the source region delimiting a channel region; a gate region; a source contact, electrically connected to the body region and to the source region; a drain contact, electrically connected to the epitaxial layer; and a source metallization region, extending over the rear surface and electrically connected to the substrate and to the sinker region.
Abstract:
A pulse generator circuit is provided. The pulse generator circuit has an input adapted to receive an input electrical quantity and an output at which an output electrical quantity is made available. A transfer characteristic establishes a relationship between said input and said output electrical quantities. The pulse generator circuit is adapted to provide said output electrical quantity in the form of pulses having a predetermined shape, suitable to be used for UWB transmission. The transfer characteristic has substantially a same shape as that of said pulses. Moreover, a UWB modulating system exploiting the novel pulse generator is proposed.
Abstract:
A method of estimating log-likelihood ratios for first and second streams of samples of a received S-FSK signal demodulated using first and second carriers includes estimating channel and noise parameters associated with first and second transmitted values for the first and second streams of samples obtained from the received S-FSK modulated signal. Current signal-to-noise ratios are estimated for current samples of the first and second streams of samples obtained from the received S-FSK modulated signal using the channel and noise parameters. The estimated current signal-to-noise ratios are compared with values of a discrete ordered set and respective pairs of consecutive values of the discrete ordered set between which the estimated current signal-to-noise ratios are comprised are identified. Log-likelihood ratios are estimated for the current samples of the first and second streams.
Abstract:
A MEMS resonant accelerometer is disclosed, having: a proof mass coupled to a first anchoring region via a first elastic element so as to be free to move along a sensing axis in response to an external acceleration; and a first resonant element mechanically coupled to the proof mass through the first elastic element so as to be subject to a first axial stress when the proof mass moves along the sensing axis and thus to a first variation of a resonant frequency. The MEMS resonant accelerometer is further provided with a second resonant element mechanically coupled to the proof mass through a second elastic element so as to be subject to a second axial stress when the proof mass moves along the sensing axis, substantially opposite to the first axial stress, and thus to a second variation of a resonant frequency, opposite to the first variation.
Abstract:
Spectrum usage in a radio cognitive transmission system may be monitored in a distributed manner in space and time through a first set of monitoring apparatuses and a second set of monitoring apparatuses. The first set of monitoring apparatuses may be associated to apparatuses, such as base stations, having a monitoring precision level, for example, linked to the spectrum sampling frequency, greater with respect to the monitoring precision of the monitoring apparatus of the second set. The later may be suitable to be represented by a low-cost “sniffer” associated to consumer electronics devices.
Abstract:
A method of detecting an angular position of a rotor of a motor includes detecting switching ripple peaks and armature current disturbance peaks using a peak detector configured to generate a square wave having edges coinciding with detected peaks. The method further includes filtering the square wave in a time domain by generating an integration ramp, toward a set value, of an estimated ripple frequency for an interval of time based on the estimated ripple frequency. An enablement range is established to reset the integration ramp by setting a threshold below and above the set value and a time window centered on an end time of each period of the estimated ripple frequency. The method further includes resetting the integration ramp, and updating the estimated ripple frequency based upon a period determined by a time of the resetting, if an edge of the square wave is within the time window. The method also includes integrating until the threshold is exceeded, resetting the integration ramp, and reducing the estimated ripple frequency to a period determined by the resetting, if the edge of the square wave is not within the time window.
Abstract:
A non-volatile memory including a plurality of memory cells configured to store data and a plurality of redundant memory cells configured to be used for functionally replacing defective memory cells. The memory further includes a protection register comprising storage elements configured to store configuration data of the memory device. The storage elements of the protection register are redundant memory cells not being used to replace defective memory cells.
Abstract:
A power amplifier formed by a plurality of pairs of transistors, each pair including a first transistor and a second transistor having each a respective input terminal and a respective output terminal. The output terminals of the first and second transistors of each pair are connected to an output distributed active transformer connected to a differential output of the power amplifier. The input terminals of the first and second transistors of each pair are connected to an input distributed active transformer connected to an input of the power amplifier.
Abstract:
Small phase change memory cells may be formed by forming a segmented heater over a substrate. A stop layer may be formed over the heater layer and segmented with the heater layer. Then, sidewall spacers may be formed over the segmented heater to define an aperture between the sidewall spacers that may act as a mask for etching the stop layer over the segmented heater. As a result of the etching using the sidewall spacers as a mask, sublithographic pore may be formed over the heater. Phase change material may be formed within the pore.
Abstract:
A MEMS acoustic transducer provided with a substrate having cavity, and a membrane suspended above the cavity and fixed peripherally to the substrate, with the possibility of oscillation, through at least one membrane anchorage. The membrane comprises at least one spring arranged in the proximity of the anchorage and facing it, and is designed to act in tension or compression in a direction lying in the same plane as said membrane.