Abstract: A tamper-evident RFID Tag (100) and a method for manufacturing it. The method (500) may provide (510) at least one protection layer (151) before being cured (520) such as to turn the at least one protection layer (151) into at least one degradable layer (155), and to prevent an assembly or a reassembly of the tamper-evident RFID Tag (100) after any attempt of harvesting of the tamper-evident RFID Tag (100).

Abstract: A method for providing identification and access with respect to a passive radio-frequency tag in a tag population, including, receiving a command for initiating an inventory round or a command for initiating a tag access, the command including, as a parameter, a number including an identifier of a reader, generating a 16-bit value referred to as first or second binding handle, the first or second binding handle including N juxtaposed bits forming the reader identifier, backscattering the first or second binding handle, receiving an ACK command, analyzing the identification parameter of the ACK command, and in a case where the identification parameter includes the reader identifier then ignoring the ACK command, only tags having the selected inventoried flag value for the session number are inventoried, the first initiating command only including the same inventoried flag for every inventoried tags during a session and wherein the at least other inventoried flag value is never used during the session.

Abstract: A power control unit is provided to monitor the output power of a charge pump converter having an input impedance and an input impedance controlling terminal to be plugged to the power control unit and modify the input impedance. The power control unit includes a control circuit sense the output power of the charge pump converter and a control unit to receive the sensed power value, establish a control value, and send the control value to the impedance controlling terminal so as to modify the input impedance.

Abstract: An open loop control unit is provided to monitor an output power of a charge pump converter having an input impedance and a first input impedance controlling terminal configured to be plugged to the open loop control unit and modify the input impedance. The open loop control unit includes at least a reference circuit to sense the output power of the charge pump converter and at least one control circuit to receive the difference value, establish a trim value, and send the trim value to the impedance controlling terminal so as to modify the input impedance.

Abstract: Provided is a gate controller having a primary signal input which is AC coupled to the gate through a capacitor, one or more bias inputs each connected to the gate through a resistor such as to control the DC voltage bias of the gate and therefore the conductivity of the switching element. The bias inputs can be properly connected to internal nodes of the charge pump, or charge pump stages, such that the gate controller is self-biased, without using bias-reference external to the charge pump. The gate controller can be made programmable by using potentiometers in place of the bias resistors.

Abstract: A power control unit is provided to control the efficiency of a charge pump converter having a first input terminal and a second input terminal, a primary attenuator and a secondary attenuator between a first input terminal and the second input terminal, a first output terminal, a second output terminal, a secondary attenuator controlling terminal and a primary attenuator controlling terminal to be plugged to the power control unit. The primary attenuator controlling terminal and the secondary attenuator controlling terminal are to attenuate or amplify a signal of the first input terminal and the second input terminal.

Abstract: A method of determining an absolute angle of a magnetic field includes receiving a first digital measurement value Bx of a first magnetic field component indicating intensity of the magnetic field along a first axis; receiving a second digital measurement value Bz of a second magnetic field component indicating the intensity of the magnetic field along a second axis, orthogonal to the first axis; determining absolute values for the first and second magnetic field components; and determining the angle of the magnetic field with respect to the first or second axis. The angle is determined so that the angle is derivable from the value of arcsin of Bz or of its approximation, when the absolute value of Bz? the absolute value of Bx, and derivable from the value of arccos of Bx or of its approximation, when the absolute value of Bz> the absolute value of Bx.

Abstract: The present disclosure relates to a NFC communication system, to a method of establishing communication between a wireless communication device and a passive NFC device and to a passive NFC device. The passive NFC device includes an NFC controller, an NFC transceiver coupled with the NFC controller, and at least one persistent flag coupled with the NFC controller, the persistent flag being switchable between an activated state and a deactivated state. The NFC controller is configured to perform a logical operation being divisible into a sequence of at least a first subtask and a second subtask and the NFC controller is configured to ascertain the status of the persistent flag. The NFC controller is further configured to selectively perform at least one of the first subtask and the second subtask on the basis of the status of the persistent flag.

Abstract: The system (4) is provided for managing at least one sub-assembly (2) of an electric battery. Each sub-assembly comprises a plurality of power storage cells (12). The system includes, for each power storage cell, a circuit (14) for managing the state of the cell and a communication circuit (16), which is configured such that it receives and transmits data relative to the cell. The communication circuit is configured such that it transposes, over a carrier frequency, the data to be received and transmitted, the value of said carrier frequency being greater than or equal to 1 GHz. The management system further includes, for each sub-assembly, a loss cable (18) connecting the power storage cells of said sub-assembly. The loss cable acts as a waveguide and is coupled by capacitive coupling to the communication circuit of each power storage cell.

Abstract: A method for providing identification and access with respect to a passive radio-frequency tag in a tag population, including, receiving a command for initiating an inventory round or a command for initiating a tag access, the command including, as a parameter, a number including an identifier of a reader, generating a 16-bit value referred to as first or second binding handle, the first or second binding handle including N juxtaposed bits forming the reader identifier, backscattering the first or second binding handle, receiving an ACK command, analyzing the identification parameter of the ACK command, and in a case where the identification parameter includes the reader identifier then ignoring the ACK command, only tags having the selected inventoried flag value for the session number are inventoried, the first initiating command only including the same inventoried flag for every inventoried tags during a session and wherein the at least other inventoried flag value is never used during the session.

Abstract: The present disclosure relates to a NFC communication system, to a method of establishing communication between a wireless communication device and a passive NFC device and to a passive NFC device. The passive NFC device includes an NFC controller, an NFC transceiver coupled with the NFC controller, and at least one persistent flag coupled with the NFC controller, the persistent flag being switchable between an activated state and a deactivated state. The NFC controller is configured to perform a logical operation being divisible into a sequence of at least a first subtask and a second subtask and the NFC controller is configured to ascertain the status of the persistent flag. The NFC controller is further configured to selectively perform at least one of the first subtask and the second subtask on the basis of the status of the persistent flag.

Abstract: A method of authenticating a transponder in communication with a server. The method includes the steps of defining a word in the transponder with a previous state of a counter of the transponder, incremented by a random number generated in the transponder, calculating a one-time password in the transponder with the aid of an HOTP algorithm and of a secret key on the basis of the word, transmitting the word and the one-time password to the server, calculating another one-time password in the server with the word received from the transponder by the HOTP algorithm and with one and the same secret key, and checking whether the passwords are identical so as to authenticate the transponder and authorize access to a site determined by the server.

Abstract: An RFID circuit and to a demodulator for an RFID circuit, the demodulator including an input and at least one output, a clock extractor connected to the input, a comparator connected to at least one output, a finite impulse response FIR filter arrangement connected to the input and connected to the comparator.

Abstract: A power management integrated circuit including a reference signal generator, a start-up unit and a supervisory circuit. The supervisory circuit includes an electrical resistance circuit connected between a first end node and a second end node; a power supply input for receiving a supply voltage, this power supply input being connected to the first end node; a low reference potential node; a comparator for comparing a reference voltage value at a first input and a divided voltage value at a second input connected to an internal electrical node of the electrical resistance circuit, the comparator can output a monitoring signal. The supervisory circuit includes a switch controlled by the start-up unit so that the switch is selectively closed and opened based on a detected operational state of the reference signal generator indicating a normal functioning phase of the power management circuit.

Abstract: An electronic measuring device for measuring a physical parameter includes a differential analogue sensor formed from two capacitances—an excitation circuit of the differential analogue sensor providing to the sensor two electrical excitation signals which are inverted—a measuring circuit which generates an analogue electrical voltage which is a function determined from the value of the sensor, and a circuit for compensating for a possible offset of the sensor, which is formed from a compensation capacitance, which is excited by its own electrical excitation signal. The excitation circuit is arranged in order to be able to provide to an additional capacitance of the compensation circuit its own electrical excitation signal having a linear dependence on the absolute temperature with a determined proportionality factor in order to compensate for a drift in temperature of an electrical assembly of the measuring device comprising at least the compensation capacitance.

Abstract: The elementary pumping cell comprises an input (E) receiving an input voltage (Vin), a clock terminal (H) receiving a first clock signal (CK1) and an output (S), a first capacitor (C1) having a first terminal connected to the clock terminal and a second terminal, a first transistor (A1) having a first source/drain terminal coupled to the input, a second source/drain terminal and a gate terminal, a second transistor (A2) having a first source/drain terminal, a second source/drain terminal coupled to the input and a gate terminal coupled to the second terminal of the first capacitor, a third transistor (A3) having a first source/drain terminal coupled to the first source/drain terminal of the second transistor, a second source/drain terminal coupled to the gate terminal of the second transistor and a gate terminal coupled to the input, and a fourth transistor (A4) having a first source/drain terminal coupled to the second source/drain terminal of the first transistor, a second source/drain terminal coupled to t

Abstract: An integrated circuit chip (2), an antenna (3) and a tamper loop (4), and in addition to this, a light emitting diode (LED) (20), configured to be activated, i.e. supplied with current, upon a signal received by the antenna (3). The LED (20) is integrated in the device in such a way that when the LED is activated in the above-described way, the LED lights up so as to become visible by the naked eye, on the condition that the tamper loop (4) is in a predefined state, either open or closed. The LED (20) is coupled between the same terminals (8,9) of the integrated circuit chip (2) as the tamper loop (4).

Abstract: A method of determining an absolute angle of a magnetic field includes receiving a first digital measurement value Bx of a first magnetic field component indicating intensity of the magnetic field along a first axis; receiving a second digital measurement value Bz of a second magnetic field component indicating the intensity of the magnetic field along a second axis, orthogonal to the first axis; determining absolute values for the first and second magnetic field components; and determining the angle of the magnetic field with respect to the first or second axis. The angle is determined so that the angle is derivable from the value of arcsin of Bz or of its approximation, when the absolute value of Bz? the absolute value of Bx, and derivable from the value of arccos of Bx or of its approximation, when the absolute value of Bz> the absolute value of Bx.

Abstract: A method of authenticating a transponder communicating with a server, including: calculating a one-time password in the transponder with a dedicated algorithm, on the basis of the state of a counter and a physical quantity, such as a transmission delay determined in the transponder during reading by a reading device; transmitting the password to the server by the reading device, which determines a transmission delay of the transponder, and transmitting to the server, in addition to the password, the information about the transmission delay determined in the reading device; decrypting by the dedicated algorithm the password, and checking if the decrypted transmission delay of the received password corresponds to the transmission delay determined by the reading device within a determined temporal margin, and if the state of the counter is different from a received previous state of the counter so as to authenticate the transponder.

Abstract: The system (4) is provided for managing at least one sub-assembly (2) of an electric battery. Each sub-assembly comprises a plurality of power storage cells (12). The system includes, for each power storage cell, a circuit (14) for managing the state of the cell and a communication circuit (16), which is configured such that it receives and transmits data relative to the cell. The communication circuit is configured such that it transposes, over a carrier frequency, the data to be received and transmitted, the value of said carrier frequency being greater than or equal to 1 GHz. The management system further includes, for each sub-assembly, a loss cable (18) connecting the power storage cells of said sub-assembly. The loss cable acts as a waveguide and is coupled by capacitive coupling to the communication circuit of each power storage cell.