Abstract: A transmitarray cell (105) comprises a first antenna element (105a) adapted to switching between two phase states, a second antenna element (105b) adapted to switching between two other phase states and between two circular polarization directions and a coupler (201) coupling the first antenna element to the second antenna element.

Abstract: The present method of providing element a random for a cryptographic algorithm is implemented by an electronic calculator comprising a core and a set of memory/memories, the set of memory/memories including a reference memory having an intrinsic randomness in a predefined state of generating randoms. The method comprises: reading a reference message in a first memory zone, the first memory zone being included in the reference memory, the reading step being performed in the state of generating random elements of the reference memory; writing the reference message in a second memory zone, distinct from the first memory zone, the second memory zone being included in the set of memory/memories; subsequent reading of the reference message in the second memory zone, the reference message read in the second memory zone forming the random element for the cryptographic algorithm.

Abstract: A control system is intended to be tailored to a fuel-cell stack. This fuel-cell stack includes a plurality of cells connected in series between a first terminal and a second terminal. This system includes a central control unit and an electronic bypass device including a plurality of separate electrical bypass units, each electrical bypass unit being connected in parallel to at least one separate cell of the fuel-cell stack, in order to control its discharge on startup and shutdown of the stack and thus to avoid the creation of inverse electrical potentials and to limit the presence of residual potentials.

Abstract: A device for converting a photonic signal to be analyzed includes two output branches, and one input for receiving a photonic signal to be analyzed and splitting off a part of the photonic signal to each output branch. The device imposes a phase shift of approximately 180 degrees between the two parts, each output branch including a photodiode generating a respective first electrical current. Each output branch generates a second electrical current according to a value of the first current of the branch considered. The device also includes an amplifier generating an output signal according to a difference between the values of the second currents, a gain being defined for each output branch, and at least one electronically controlled adjustment element configured to modify one of the gains.

Abstract: A device including: a transfer substrate including electric connection elements; a plurality of first monolithic elementary chips bonded and electrically connected to the transfer substrate, each first elementary chip including at least one LED and one integrated electronic circuit for controlling said at least one LED, the device further including, associated with at least one of the first elementary chips, a second elementary chip including a vertical cavity surface-emitting laser diode, bonded and electrically connected to the transfer substrate, the first elementary chip including an integrated electronic circuit for controlling said laser diode.

Abstract: Process for manufacturing an organic electroluminescent device on a stack comprising, in succession: a substrate, incorporating n-type thin-film transistors each comprising a drain, a source and a gate; an interconnecting structure, electrically connected to the n-type transistors, and comprising: a common anode, electrically connected to the sources of the n-type transistors; vias, each electrically connected to a drain of one n-type transistor; the organic electroluminescent device being formed with a direct architecture, a cathode being singulated at the pixel scale, each pixel being drivable using an electrical contact pad dedicated thereto.

Abstract: An electronic circuit including a surface intended to be attached to another electronic circuit by hybrid molecular bonding. The electronic circuit includes an electrically-insulating layer exposed on the surface, and, distributed in the electrically-insulating layer, first electrically-conductive bonding pads exposed on a first portion of the surface, the density of the first bonding pads on the first portion of the surface being smaller than 30%, and at least one electrically-conductive test pad, exposed on a second portion of the surface containing a square having a side length greater than 30 ?m. The density of electrically-conductive material of the test pad exposed on the second portion of the surface is in the range from 40% to 80%.

Abstract: A reactor for hydrothermal oxidation treatment of an organic material in a reaction medium, comprising: a confinement member housed in a chamber and defining a confinement zone and a peripheral zone; at least one inlet for an oxidising fluid into the peripheral zone; a first cooling system, with an external circulation cold loop having a fluid inlet and outlet, opening into a first portion of the peripheral zone; a heating system, with an external circulation hot loop having a fluid inlet and outlet opening into a second portion of the peripheral zone; a channel with a mouth, a channel stirring system; a second cooling system for creating a temperature gradient along the channel between a cold temperature and the reaction temperature; each circulation loop being equipped with a circulator and with a heat exchanger.

Abstract: A process for treating a stack intended for manufacture of a photovoltaic cell includes placing the stack in an enclosure, exposing the stack to electromagnetic radiation, and cooling the stack during exposure. The photovoltaic cell is cooled by injecting a gas flow into the enclosure, regulating the injected gas flow taking into account the temperature of the stack, and evacuating the gas flow from the enclosure taking into account the ambient temperature present in the enclosure.

Abstract: The present disclosure concerns a SPAD photodiode control circuit, including: a first current source; a current mirror including an input transistor in series with the first current source and an output transistor in series with the SPAD photodiode and a second current source in series with the input transistor of the current mirror and in parallel with the first current source, the second current source being alternately controllable to a so-called inactive state where it delivers no current and to a so-called active state where it delivers a non-zero current which adds, in the input transistor of the current mirror, to a current delivered by the first current source.

Abstract: The present description concerns a method of manufacturing a semiconductor component (170), including the successive steps of: providing a stack including a first semiconductor layer (105) made of a III-N compound and a second conductive layer (107) coating the first layer; forming a trench (110) crossing the second layer (107) and stopping on the first layer (105), said trench laterally delimiting a contact metallization in the second layer (107); forming in said trench (110) a metal spacer (111) made of a material different from that of the second layer (107), in contact with the sides of the contact metallization; and continuing said trench (110) through at least a portion of the thickness of the first layer (105).

Abstract: A switch including a transistor to be protected, and a Miller effect protection unit including a protection transistor, the drain of the protection transistor being connected to the gate of the transistor to be protected, the source of the protection transistor being connected to the source of the transistor to be protected, a linking circuit, the linking circuit being a high-pass filter arranged between the gate of the protection transistor and the drain of the transistor to be protected, and a control circuit interposed between the gate of the protection transistor and the source of the transistor to be protected.

Abstract: The invention relates to a device for converting a photonic signal to be analyzed, comprising two output branches, one input for receiving a photonic signal to be analyzed and splitting off a part of the photonic signal to each output branch, the device imposing a phase shift of approximately 180 degrees between the two parts, each output branch including a photodiode generating a respective first electrical current, each output branch generating a second current according to a value of the first current of the branch considered, the device comprising an amplifier generating an output signal according to a difference between the values of the second currents, a gain being defined for each output branch, the device including at least one electronically controlled adjustment element apt to modify one of the gains.

Abstract: A system for measuring the neural activity of a living being, including an implantable measuring device equipped with a housing to be accommodated, at least partially, in a cavity formed in the cranium (C) of a living being, and including a system of electrodes for measuring the neural activity, arranged on one face of the housing, and electronic signal-processing device, which are accommodated in the housing and to which the electrode system is connected, a device for fixing the housing in the cavity, the fixing device including at least one device for mechanically holding the housing in the cavity, a device for fixing the mechanical holding device, which are arranged to fix the holding device in the cranium (C) on the periphery of the cavity, a device for adjusting the depth position of the housing in the cavity.

Abstract: The electronic circuit performs binary computation operations and comprises word, bit and source lines, and memory cells organized in rows and columns. Each cell includes one pair of memristors and one pair of switches, each memristor being connected to a switch and linked to the same source line during each computation operation, each pair of memristors storing a binary value; the switches being linked to a word line and to a pair of complementary bit lines. The circuit comprises a reading module including: a logic unit for each column, each comprising an input terminal connected to a source line to receive a column value, the logic unit toggling between values, depending on a comparison of the column value with a toggle threshold value; a modification unit for modifying, for at least one logic unit and depending on the computation operation, a difference between the column and threshold values.

Abstract: A solid-state microbattery, including a substrate; a lithium-cobalt-oxide layer forming a cathode having first and second opposite surfaces; a lithium-based solid-state electrolyte formed on the first surface of the cathode; the second surface of the cathode is oriented towards the substrate; an anode formed on the solid-state electrolyte; noteworthy in that the lithium-cobalt-oxide layer possesses a grain size that increases from the first surface to the second surface.

Abstract: This invention relates to a treatment process for a material chosen from among a polyamide, a polyester and a poly(meth)acrylate. According to the invention, this process comprises a step in which contact is made between this material and a polar organic solvent in a supercritical fluid. This invention also relates to a process for manufacturing a part from a material chosen from among a polyamide, a polyester and a poly(meth)acrylate in a divided form. Finally, the invention relates to use of the material treated by the treatment process and to use of the part manufactured by the manufacturing process in the low voltage, medium voltage or high voltage electrical industry.

Abstract: The present description concerns an optoelectronic device (300) including: a vertical stack of first (101) and second (105) semiconductor layers forming a PN junction, and of a third conductive layer (107) arranged on top of and in contact with the surface of the second layer opposite to the first layer; a peripheral trench (110) crossing the third (107) and second (105) layers, said trench laterally delimiting a portion of the third layer (107) and a portion of the second layer (105); in said trench (110), a conductive spacer (301) in contact with a lateral side of said portion of the third layer (107); and in said trench (110), an insulated conductive gate (113, 111) extending against a lateral side of the conductive spacer (301) and against a lateral side of said portion of the second layer.

Abstract: The present description concerns a polarization cell (109) comprising a rectangular conductive plane having an off-centered opening, a terminal of application of an input signal located inside of the opening, a first switching element coupling the terminal to a first region of the conductive plane located in the vicinity of a first corner of the conductive plane and a second switching element coupling the terminal to a second region of the conductive plane located in the vicinity of a second corner of the conductive plane, the first and second corners being coupled by a same side of the conductive plane.

Abstract: The invention relates to a videoconferencing system 1, comprising: a display screen 10, for displaying an image Ie(ti) containing N images Iint(k)(ti); a camera 20, for acquiring an image Ic(tj); a single-pixel-imager-employing optical device suitable for determining N images Ico(k)(tj) on the basis of sub-matrices SMimp(k)(tj) comprising: an optical source 31, suitable for irradiating an ocular portion Po(tj) of the face of the user; a matrix of single-pixel imagers that are suitable for reconstructing a correction image Ico(k)(tj) on the basis of the light beam reflected by the ocular portion Po(tj); a processing unit 40, suitable for: determining, in each image Iint(k)(ti) of the image Ie(ti), a target point Pc(k)(tj), then selecting N sub-matrices SMimp(k)(tj) each centred on a target point Pc(k)(tj); correcting the image Ic(tj), by replacing a region of the image Pc(tj) representing the ocular portion Po(tj) with the N images Ico(k)(tj).