Abstract: An NFC tag includes a foldable substrate in the form of a tape; an antenna located at a first end of the tape; a capacitor connected to the antenna, located at the first end of the tape; an impedance, in particular a capacitor, located at a second end of the tape; and conductive tracks running along the tape to connect the impedance to the antenna.

Abstract: A near field magnetically coupled anti-counterfeiting tag comprises a control microcircuit configured to implement a basic function and a cryptographic function; a sacrificial conductive track located across a sacrificial area of the tag; and a circuit for detecting continuity of the sacrificial track, cooperating with the microcircuit to implement the basic function without implementing the cryptographic function when the sacrificial track is broken.

Abstract: A near field magnetically coupled contactless device includes a foldable substrate in the form of a tape; two metal surfaces located facing each other on opposite sides of the substrate in a region of interest of the substrate, configured such that a piercing of the region of interest causes a permanent short circuit between the two metal surfaces; and a circuit configured to detect a short circuit between the two metal surfaces.

Abstract: A near field magnetically coupled anti-counterfeiting tag comprises a control microcircuit configured to implement a basic function and a cryptographic function; a sacrificial conductive track located across a sacrificial area of the tag; and a circuit for detecting continuity of the sacrificial track, cooperating with the microcircuit to implement the basic function without implementing the cryptographic function when the sacrificial track is broken.

Abstract: An NFC tag includes a foldable substrate in the form of a tape; an antenna located at a first end of the tape; a capacitor connected to the antenna, located at the first end of the tape; an impedance, in particular a capacitor, located at a second end of the tape; and conductive tracks running along the tape to connect the impedance to the antenna.

Abstract: A near field magnetically coupled contactless device, comprises a foldable substrate in the form of a tape; an antenna circuit tuned to a nominal frequency, including an antenna and a capacitor connected to the antenna; a sacrificial impedance connected to the antenna circuit to contribute to the tuning of the antenna circuit to the nominal frequency; and a sacrificial structure comprising a conductive track connecting the sacrificial impedance to the antenna circuit, configured in meanders occupying a region of interest of the substrate such that a piercing of the region of interest severs the conductive track.

Abstract: The present invention relates to a method for manufacturing an object integrating a contactless microcircuit, the method including steps of: forming an antenna coil in the shape of a spiral from a first face of a medium, forming on the medium first and second conducting pads respectively coupled to internal and external ends of the spiral of the antenna coil, connecting the connection terminals of the microcircuit to third and fourth conducting pads, and fixing the microcircuit onto the medium by arranging opposite one another the first and the third conducting pad, and opposite one another the second and the fourth conducting pad, the first to fourth conducting pads forming two capacitors mounted in series with the antenna coil, the antenna coil and the first and second conducting pads being formed by inserting a conducting wire into the medium.

Abstract: The present invention relates to a method for manufacturing an object integrating a contactless microcircuit, the method including steps of: forming an antenna coil in the shape of a spiral on a first face of a medium, fixing the microcircuit onto the medium, forming on the medium first and second conducting pads respectively coupled to ends internal and external to the spiral of the antenna coil, connecting the connection terminals of the microcircuit to third and fourth conducting pads, and fixing the microcircuit onto the medium, by arranging opposite one another the first and the third conducting pad, and opposite one another the second and the fourth conducting pad, so as to form two capacitors mounted in series with the antenna coil, the first or second conducting pad including a non-conducting window opposite which the microcircuit is placed.

Abstract: The selection of at least one back-modulation element of an electromagnetic transponder from among a plurality of resistive and/or capacitive modulation elements of the load of an oscillating circuit of the transponder, including selecting the modulation element(s) according to a binary message received from a read/write terminal.

Abstract: The selection of at least one back-modulation element of an electromagnetic transponder from among a plurality of resistive and/or capacitive modulation elements of the load of an oscillating circuit of the transponder, including selecting the modulation element(s) according to a binary message received from a read/write terminal.

Abstract: The selection of at least one back-modulation element of an electromagnetic transponder from among a plurality of resistive and/or capacitive modulation elements of the load of an oscillating circuit of the transponder, including selecting the modulation element(s) according to a binary message received from a read/write terminal.

Abstract: In some implementations, a mobile device includes a first interface configured to communicably couple to a removable integrated circuit card; a second interface configured to wirelessly communicate with a contactless reader that is external to the mobile device; a communication interface that couples the first interface and the second interface and that is configured to obtain information from an integrated circuit card that is coupled to the first interface in response to receipt by the second interface of an information request from the contactless reader; and a programmable timer that is configured to be started in response to the second interface receiving an information request from the contactless reader, and that is further configured to, upon reaching a programmed value, cause the second interface to transmit the obtained information to the contactless reader.

Abstract: A terminal for generating an electromagnetic field, including an oscillating circuit capable of receiving a high-frequency A.C. excitation voltage via an amplifier and a directional coupler, the oscillating circuit having at least one element of variable capacitance, and circuitry for modifying the value of this capacitance according to the amplitude of a signal extracted from the coupler.

Abstract: The subject matter of this specification can be embodied in, among other things, a circuit that includes a power module that includes an antenna. The power module is configured to generate power from a carrier signal received by the antenna. The circuit also includes a subcarrier generator powered by the power module when the carrier signal is received regardless of a communication protocol used in transmitting the carrier signal. The subcarrier generator generates an obscuring signal configured to obscure an information signal generated by another circuit energized by the carrier signal.

Abstract: In some implementations, a mobile device includes a first interface configured to communicably couple to a removable integrated circuit card; a second interface configured to wirelessly communicate with a contactless reader that is external to the mobile device; a communication interface that couples the first interface and the second interface and that is configured to obtain information from an integrated circuit card that is coupled to the first interface in response to receipt by the second interface of an information request from the contactless reader; and a programmable timer that is configured to be started in response to the second interface receiving an information request from the contactless reader, and that is further configured to, upon reaching a programmed value, cause the second interface to transmit the obtained information to the contactless reader.

Abstract: The invention relates to a method for modulating data (D) to be transmitted by an electromagnetic transponder (10?) by means of at least one resistive and/or capacitive element (18) for modulating the charge of an oscillating circuit that it comprises. The invention consists of combining, by an involutive function (19), the flow of data to be transmitted with a spread spectrum sequence (ci(t)), said sequence being selected according to a configuration message (SRFU) received from a read/write terminal (1?).

Abstract: An amplitude demodulation method and device comprising a converter sampling an input signal having its sampling frequency corresponding to three times the modulation carrier frequency.

Abstract: A method and a circuit for detecting a modulation factor in a signal received in amplitude modulation, including comparing the received signal with two first values, comparing the received signal with two second values ranging between the first two values, and considering the presence of an insufficient modulation depth if the received signal ranges between at least two of said values.

Abstract: A system of contactless electromagnetic transmission between a terminal including a series oscillating circuit for generating an electromagnetic field and a transponder including a parallel oscillating circuit, these oscillating circuits being sized so that the coupling coefficient between them strongly decreases when the distance separating the transponder from the terminal becomes greater than a predetermined value.