Abstract: A device for capturing EEG signals comprises a flexible wireless sensor configured to be adhesively attached at an EEG measurement point of a user's head, and configured to be remotely powered and to transmit, via a first radio frequency link, EEG data corresponding to samples of a measured EEG signal; a base station located near the sensor, configured to remotely power the sensor; and a terminal configured to receive transmitted EEG data.

Abstract: A thermal pattern sensor including a matrix of pixels each comprising: a detection element formed by a portion of a detection material having a temperature coefficient of resistance greater than 0.2%/K; a metal portion configured to heat the detection element; a dielectric portion electrically insulating part of the detection element from the metal portion; and wherein: the detection elements of a same column of pixels all have the same electrical resistance value and are electrically coupled to each other and to a readout circuit; the metal portions of the same row of pixels are electrically coupled to each other; the sensor further includes an electromagnetic shielding layer covering all the detection elements and electrically insulated from said detection elements.

Abstract: In a general aspect, a method can include producing, by an inductive antenna circuit, a first periodic signal that is based on an alternating external magnetic field; producing, by an oscillator circuit, a second periodic signal that is based on the first periodic signal; and transmitting, in correspondence with a data-carrying modulation signal, a sequence of data bits. The transmitting can include sequentially and repetitively: applying, with the oscillator circuit operating in a free oscillation mode, the second periodic signal to the inductive antenna circuit; and inhibiting, with the oscillator circuit operating in a synchronous oscillation mode, application of the second periodic signal to the inductive antenna circuit. The synchronous oscillation mode of the oscillator circuit can cause the second periodic signal to be synchronized to the first periodic signal.

Abstract: A method for sending data by inductive coupling includes: extracting an antenna signal from an antenna circuit, extracting from the antenna signal a first periodic signal, producing a second periodic signal by way of a synchronous oscillator, placing the oscillator in a free oscillation mode and applying to the antenna circuit the second periodic signal, modifying the impedance of the antenna circuit, restoring the amplitude of the antenna signal, then resynchronizing the oscillator on the first periodic signal.

Abstract: A near field transaction system includes a first transaction device having near field communication circuitry, and a portable device having near field communication circuitry. The system also includes at least one transaction server having a memory area with at least one application program, and a mechanism for establishing a data link between the server and the near field communication circuitry of the portable device. The application program is configured to perform a transaction with the first transaction device, using the near field communication circuitry of the portable device as a proximity relay to communicate with the first transaction terminal.

Abstract: A method for performing a transaction between a portable device and a transaction terminal includes establishing a communication channel between the portable device and the transaction terminal; establishing a first data link between the transaction terminal and the transaction server; and using an application program in the transaction server to perform the transaction with the transaction terminal through the data link, on behalf of the portable device.

Abstract: In a general aspect, a method can include producing, by an inductive antenna circuit, a first periodic signal that is based on an alternating external magnetic field; producing, by an oscillator circuit, a second periodic signal that is based on the first periodic signal; and transmitting, in correspondence with a data-carrying modulation signal, a sequence of data bits. The transmitting can include sequentially and repetitively: applying, with the oscillator circuit operating in a free oscillation mode, the second periodic signal to the inductive antenna circuit; and inhibiting, with the oscillator circuit operating in a synchronous oscillation mode, application of the second periodic signal to the inductive antenna circuit. The synchronous oscillation mode of the oscillator circuit can cause the second periodic signal to be synchronized to the first periodic signal.

Abstract: In a general aspect, a method can include producing, by an inductive antenna circuit, a first periodic signal that is based on an alternating external magnetic field; producing, by an oscillator circuit, a second periodic signal that is based on the first periodic signal; and transmitting, in correspondence with a data-carrying modulation signal, a sequence of data bits. The transmitting can include sequentially and repetitively: applying, with the oscillator circuit operating in a free oscillation mode, the second periodic signal to the inductive antenna circuit; and inhibiting, with the oscillator circuit operating in a synchronous oscillation mode, application of the second periodic signal to the inductive antenna circuit. The synchronous oscillation mode of the oscillator circuit can cause the second periodic signal to be synchronized to the first periodic signal.

Abstract: In a general aspect, an electronic device can include a device configured to transmit data by intracorporeal current. The device configured to transmit data by intracorporeal current can include a first electrode configured to be capacitively coupled with a body of a user or capacitively coupled in an intracorporeal current conduction path of the electronic device. The electronic device can further include a circuit configured to electrically bias the first electrode. The circuit can include an electric coil arranged near the first electrode. The electric coil can be configured to, in response to an alternating-current (AC) signal, generate an alternating magnetic field having field lines incident on the first electrode. The field lines incident on the first electrode can induce a current in the first electrode, where the current induces an electric field that generates an intracorporeal current.

Abstract: In a general aspect, a portable electronic device can include a digital display including a first electrically conductive plane. The first electrically conductive plane can be configured to neutralize electromagnetic radiation produced by the digital display. The portable electronic device can also include a data transmission device configured to transmit data by intracorporeal current. The data transmission device can include a first electrode that is configured to be capacitively coupled with a body of a user and a second electrode that includes the first electrically conductive plane. The first electrically conductive plane can be electrically coupled with an electrical ground of the data transmission device. The portable electronic device can further include a printed circuit including a second electrically conductive plane. The second electrically conductive plane can be included in the second electrode of the data transmission device.

Abstract: In a general aspect, a method for transmitting data between an NFC card and an external NFC device via a selected interface (e.g., contact or contactless), and further via a contactless interface of the NFC module when the contact interface of the NFC card is selected can include using an NFC card that includes an antenna circuit having an antenna coil with a magnetic axis and an electrically conductive screen extending near the antenna coil. The magnetic axis of the antenna coil can be substantially parallel to a plane defined by the NFC card and not cross the conductive screen. The contactless interface of the NFC card, when selected by the NFC card, can emit data by emitting bursts of magnetic field from the antenna coil, so as to compensate for effects of the conductive screen on a maximum distance for transmitting data by load modulation.

Abstract: In a general aspect, a method can include producing, by an inductive antenna circuit, a first periodic signal that is based on an alternating external magnetic field; producing, by an oscillator circuit, a second periodic signal that is based on the first periodic signal; and transmitting, in correspondence with a data-carrying modulation signal, a sequence of data bits. The transmitting can include sequentially and repetitively: applying, with the oscillator circuit operating in a free oscillation mode, the second periodic signal to the inductive antenna circuit; and inhibiting, with the oscillator circuit operating in a synchronous oscillation mode, application of the second periodic signal to the inductive antenna circuit. The synchronous oscillation mode of the oscillator circuit can cause the second periodic signal to be synchronized to the first periodic signal.

Abstract: In a general aspect, a method for transmitting data between an NFC card and an external NFC device via a selected interface (e.g., contact or contactless), and further via a contactless interface of the NFC module when the contact interface of the NFC card is selected can include using an NFC card that includes an antenna circuit having an antenna coil with a magnetic axis and an electrically conductive screen extending near the antenna coil. The magnetic axis of the antenna coil can be substantially parallel to a plane defined by the NFC card and not cross the conductive screen. The contactless interface of the NFC card, when selected by the NFC card, can emit data by emitting bursts of magnetic field from the antenna coil, so as to compensate for effects of the conductive screen on a maximum distance for transmitting data by load modulation.

Abstract: A method for sending data by inductive coupling includes: extracting an antenna signal from an antenna circuit, extracting from the antenna signal a first periodic signal, producing a second periodic signal by way of a synchronous oscillator, placing the oscillator in a free oscillation mode and applying to the antenna circuit the second periodic signal, modifying the impedance of the antenna circuit, restoring the amplitude of the antenna signal, then resynchronizing the oscillator on the first periodic signal.

Abstract: The present invention relates to a contactless communication method between an NFC card with a contact and contactless dual interface, installed in a communication terminal, and an external NFC device, the terminal including an NFC module coupled to the contact interface of the card and including a contactless communication interface, the method including the steps of: selecting one or the other of the contact and contactless interfaces of the card, transmitting signals between the card and the NFC device through the selected interface, and if the contact interface of the card is selected, through the contactless interface of the NFC module, and detecting by the card the presence of the NFC module connected to its contact interface, the selection of one or the other of the contact and contactless interfaces of the card being performed by the card depending on the result of the detection of the NFC module presence.

Abstract: The present invention relates to a portable electronic device comprising a digital display comprising an electrically conducting plane for neutralizing interfering electromagnetic radiation of the display, a device for transmitting data by intracorporeal current comprising a first electrode and a second electrode. According to the present invention, the first electrode is formed by the conducting plane of the display, which is electrically coupled to the data transmission device, and the second electrode is formed by a conducting plane of a printed circuit.

Abstract: The present invention relates to a device for transmitting data by intracorporeal current comprising a first electrode intended to be capacitively coupled with the body of a subject or with the environment, and a circuit for biasing the first electrode comprising an electric coil arranged near the first electrode so as to generate, from an AC signal, an alternating magnetic field having field lines which interfere with the first electrode and therein induce currents which, in turn, induce an electric field generating intracorporeal current.

Abstract: A method for sending data by inductive coupling includes: extracting an antenna signal from an antenna circuit, extracting from the antenna signal a first periodic signal, producing a second periodic signal by way of a synchronous oscillator, placing the oscillator in a free oscillation mode and applying to the antenna circuit the second periodic signal, modifying the impedance of the antenna circuit, restoring the amplitude of the antenna signal, then resynchronizing the oscillator on the first periodic signal.

Abstract: The present invention relates to a method for manufacturing a microcircuit card, including steps of: forming a first antenna coil in a card, the first antenna coil having a part following the edge of the card, forming a module having a microcircuit and a second antenna coil around and connected to the microcircuit, and implanting the module into the card at a precise position in relation to the edge of the card, the first antenna coil being coupled by induction to the second antenna coil, the first antenna coil being pre-formed in such a way that only one part of the second antenna coil is at a distance from the first antenna coil of less than 5% of the width of the second antenna coil.

Abstract: A receiving device with intracorporeal current having a device for collecting, by capacitive coupling, an AC signal depending on a current that has passed through all or part of the body of a subject, a device for extracting data from the AC signal collected, and a device for extracting from the AC signal a biological signal generated by the body of the subject and modulating the amplitude of the AC signal.