Abstract: The invention is aimed at optimizing the life of the power supply of mobile equipment with a radiofrequency communication interface by switching off the power to it when it reaches a given state. A mobile device (102) has a battery (206), a radiofrequency circuit (201) allowing the mobile device (102) to exchange information with a host device (101). The mobile device (102) comprises an electronic switch (202) connected between the battery (206) and at least the radiofrequency circuit (201), where the switch makes it possible to supply power or not to the radiofrequency circuit. A power control circuit (203) is capable of controlling the electronic switch (202) so that it ceases to power the radiofrequency circuit as soon a break in communication is detected.

Abstract: The present invention relates to a communication object comprising means for radiofrequency communication with a remote device, wherein said communication means are capable of establishing a first short-range communication and a second communication having a longer range than the first communication, said long range being enabled by Bluetooth or Wifi technology. The communication means use the same type of communication technology for the first and second communications. The invention also relates to a method for implementing the dual-range radiofrequency communication of the object.

Abstract: In order to allow a display of the latest transactions, a smart card 100c for secure transactions comprises at least one secure chip 101c, for example of the EMV type, with at least one communication interface to communicate with a card reader in order to carry out a transaction, an electronic display 103, an independent battery 104, a card reader circuit 150c connected to a communication interface of the secure chip in order to access the information contained in the secure chip to be able to display it on the display.

Abstract: To allow the display of the latest transactions completed, a smart card 100c comprises at least one secure chip 101c with at least one communication interface in order to communicate with a card reader in order to carry out a transaction. The card further comprises an electronic display 103, an independent battery 104, and an interception circuit 150c connected to the at least one communication interface of the secure chip in order to be able to intercept at least one type of command and save at least one piece of information so as to be able to display it on the display.

Abstract: The invention relates to a method for making a stack of memory circuits, wherein the method includes the step of testing the validity of at least two memory circuits. According to the invention, the method includes the phase of configuring each memory circuit, the configuration phase including the step of writing, within a configuration device of each memory circuit included in the stack, a piece of information on an identifier allocated to the memory circuit in the stack, and a piece of information on the results of the validity test of the memory circuit. The invention also relates to a method for addressing a memory circuit, to a stack of memory circuits, and to an electronic device including such a stack.

Abstract: In order to allow a display of the latest transactions, a smart card 100c for secure transactions comprises at least one secure chip 101c, for example of the EMV type, with at least one communication interface to communicate with a card reader in order to carry out a transaction, an electronic display 103, an independent battery 104, a card reader circuit 150c connected to a communication interface of the secure chip in order to access the information contained in the secure chip to be able to display it on the display.

Abstract: To allow the display of the latest transactions performed, a chip card 100c comprises at least one secure chip 101c furnished with at least one communication interface so as to be able to communicate with a card reader so as to perform a transaction. The card furthermore comprises an electronic display 103, an autonomous battery 104, and an interception circuit 150c linked to the at least one communication interface of the secure chip so as to be able to intercept at least one type of command and store at least one item of information so as to be able to display it on the display.

Abstract: The present invention relates to a communication object comprising means for radiofrequency communication with a remote device, wherein said communication means are capable of establishing a first short-range communication and a second communication having a longer range than the first communication, said long range being enabled by Bluetooth or Wifi technology. The communication means use the same type of communication technology for the first and second communications. The invention also relates to a method for implementing the dual-range radiofrequency communication of the object.

Abstract: The invention is aimed at optimising the life of the power supply of mobile equipment with a radiofrequency communication interface by switching off the power to it when it reaches a given state. A mobile device (102) has a battery (206), a radiofrequency circuit (201) allowing the mobile device (102) to exchange information with a host device (101). The mobile device (102) comprises an electronic switch (202) connected between the battery (206) and at least the radiofrequency circuit (201), where the switch makes it possible to supply power or not to the radiofrequency circuit. A power control circuit (203) is capable of controlling the electronic switch (202) so that it ceases to power the radiofrequency circuit as soon a break in communication is detected.

Abstract: The invention relates to a method for making a stack of memory circuits, wherein the method includes the step of testing the validity of at least two memory circuits. According to the invention, the method includes the phase of configuring each memory circuit, the configuration phase including the step of writing, within a configuration device of each memory circuit included in the stack, a piece of information on an identifier allocated to the memory circuit in the stack, and a piece of information on the results of the validity test of the memory circuit. The invention also relates to a method for addressing a memory circuit, to a stack of memory circuits, and to an electronic device including such a stack.

Abstract: A device intended for the encoding of PCM telephone signals, the system comprising in particular a reference voltage generator reproducing the 8 linear segments of the standardized compression law, a comparator which is supplied at one of it's inputs with the aforesaid reference signal and, at the other, with the previously sampled signal of unknown level, this after the possible reversal of the two signals in order to give them the same polarity and after the sign of the sample has been determined by the temporary application to the reference input of the comparator of a signal of zero level.

Abstract: A method for avoiding interference with the "logic" section of an electronic central control unit by the voltages manipulated in a network of peripheral elements, for instance in a telephone switching system, is provided. The method according to the invention uses generators which transmit recurring test pulses along two-wire lines coupled by transformers with amplifiers delivering pulses, staggered in amplitude and time, into a network of peripheral elements. Depending upon the state of these elements pulses are retransmitted, or are not retransmitted, to the base of a bipolar transistor which opens or closes a two-wire line coupled by a transformer to a receiver of the central control unit.