Patents by Inventor Christophe Moreaux

Christophe Moreaux has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9524408
    Abstract: A method is provided for managing the operating mode of an electronic tag, including at least one communication module for communicating with at least one control device and a memory for storing at least one tag identifier specific to the tag and transmittable by the tag to the at least one control device. The method includes, following reception of a deactivation instruction upon which the tag goes from an activated state to a deactivated state, a deactivation step, in which the transmission, to the control device, of the tag identifier is inhibited and in which the tag responds to a reactivation instruction by re-enabling the transmission of the tag identifier to the control device.
    Type: Grant
    Filed: June 27, 2013
    Date of Patent: December 20, 2016
    Assignees: ISSM, ORANGE
    Inventors: Caroline Fenzy Peyre, Christophe Moreaux
  • Publication number: 20150137954
    Abstract: A method is provided for managing the operating mode of an electronic tag, including at least one communication module for communicating with at least one control device and a memory for storing at least one tag identifier specific to the tag and transmittable by the tag to the at least one control device. The method includes, following reception of a deactivation instruction upon which the tag goes from an activated state to a deactivated state, a deactivation step, in which the transmission, to the control device, of the tag identifier is inhibited and in which the tag responds to a reactivation instruction by re-enabling the transmission of the tag identifier to the control device.
    Type: Application
    Filed: June 27, 2013
    Publication date: May 21, 2015
    Inventors: Caroline Fenzy Peyre, Christophe Moreaux
  • Patent number: 8896368
    Abstract: An electromagnetic transponder includes an antenna circuit, a load, and a charge pump transistor having a current path coupled between the antenna circuit and the load. During operation, a retromodulated signal is transmitted at a first level by biasing the charge pump transistor during a first time period such that an impedance of the antenna circuit has a first impedance value and current flows from the antenna circuit to the load. A retromodulated signal at a second level is transmitted by biasing the charge pump transistor during a second time period such that the impedance of the antenna circuit has a second impedance value different than the first impedance value and current flows from the antenna circuit to the load. The retromodulated signals are transmitted at the first and second levels in a sequence determined to transmit information from the electromagnetic transponder.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: November 25, 2014
    Assignee: STMicroelectronics (Rousset) SAS
    Inventors: Gilles Bas, Christophe Moreaux, Gary Seigneuret
  • Publication number: 20140077869
    Abstract: An electromagnetic transponder includes an antenna circuit, a load, and a charge pump transistor having a current path coupled between the antenna circuit and the load. During operation, a retromodulated signal is transmitted at a first level by biasing the charge pump transistor during a first time period such that an impedance of the antenna circuit has a first impedance value and current flows from the antenna circuit to the load. A retromodulated signal at a second level is transmitted by biasing the charge pump transistor during a second time period such that the impedance of the antenna circuit has a second impedance value different than the first impedance value and current flows from the antenna circuit to the load. The retromodulated signals are transmitted at the first and second levels in a sequence determined to transmit information from the electromagnetic transponder.
    Type: Application
    Filed: November 26, 2013
    Publication date: March 20, 2014
    Applicant: STMICROELECTRONICS (ROUSSET) SAS
    Inventors: Gilles Bas, Christophe Moreaux, Gary Seigneuret
  • Patent number: 8659347
    Abstract: An electromagnetic transponder includes an antenna circuit capable of providing signals to a charge pump. The pump includes a first transistor connected to a first capacitor. The transponder also includes means for applying a voltage alternating between first and second values between the gate and the conduction terminal on the side of the first capacitor of the first transistor.
    Type: Grant
    Filed: November 9, 2011
    Date of Patent: February 25, 2014
    Assignee: STMicroelectronics (Rousset) SAS
    Inventors: Gilles Bas, Christophe Moreaux, Gary Seigneuret
  • Patent number: 8410910
    Abstract: A passive contactless integrated circuit includes an electrically programmable non-volatile data memory (MEM), a charge accumulation booster circuit for supplying a high voltage necessary for writing data in the memory. The integrated circuit includes a volatile memory point for memorizing an indicator flag, and circuitry for modifying the value of the indicator flag when the high voltage reaches a critical threshold for the first time after activating the booster circuit.
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: April 2, 2013
    Assignee: STMicroelectronics SA
    Inventors: David Naura, Christophe Moreaux, Ahmed Kari, Pierre Rizzo
  • Publication number: 20120119822
    Abstract: An electromagnetic transponder includes an antenna circuit capable of providing signals to a charge pump. The pump includes a first transistor connected to a first capacitor. The transponder also includes means for applying a voltage alternating between first and second values between the gate and the conduction terminal on the side of the first capacitor of the first transistor.
    Type: Application
    Filed: November 9, 2011
    Publication date: May 17, 2012
    Applicant: STMicroelectronics (Rousset) SAS
    Inventors: Gilles Bas, Christophe Moreaux, Gary Seigneuret
  • Patent number: 8180992
    Abstract: A method for configuring a memory space, the method including reading a piece of configuration information in the memory space, determining a division of at least one part of the memory space into memory banks according to the configuration information read; and allocating to each of the memory banks an access number to be used to access a data location in the memory bank, in combination with a logic address of the location in the memory bank.
    Type: Grant
    Filed: February 25, 2008
    Date of Patent: May 15, 2012
    Assignee: STMicroelectronics S.A.
    Inventors: Christophe Moreaux, Ahmed Kari, David Naura, Pierre Rizzo
  • Patent number: 8111140
    Abstract: An electromagnetic transponder and a method for controlling by pulse trains a switch for modulating the load of this transponder in an electromagnetic field from which it extracts its power supply, the duty ratio of the pulses being controlled according to the transponder supply voltage.
    Type: Grant
    Filed: May 16, 2005
    Date of Patent: February 7, 2012
    Assignee: STMicroelectronics SA
    Inventors: Pierre Rizzo, Christophe Moreaux
  • Patent number: 8028149
    Abstract: A method of reading a group of memory words from an integrated circuit memory of a contactless tag, comprising the sending by a remote interrogation unit to the contactless tag of a specific command for reading the group of memory words from a given start address, the initialization of an address counter for the contactless tag to the value of the given start address, and the sending by the contactless tag of the memory word at the start address, as well as an iterative process comprising in succession a first step of sending by the remote interrogation unit to the contactless tag of an incrementation marker recognizable by the contactless tag, a second step of incrementation of the address counter for the contactless tag in response to the incrementation marker, and a third step of sending by the contactless tag to the remote interrogation unit of a data frame comprising the memory word stored in the memory at the address pointed at by the current value of the address counter.
    Type: Grant
    Filed: May 18, 2005
    Date of Patent: September 27, 2011
    Assignee: STMicroelectronics SA
    Inventors: Christophe Moreaux, Pierre Rizzo
  • Patent number: 8022889
    Abstract: A method for modulating the impedance of an antenna circuit supplying pump signals to a charge pump comprising at least one first pump stage and one last pump stage, the last pump stage supplying a continuous voltage. The output of the first pump stage is short-circuited by means of a switch and the last pump stage goes on pumping electric charges and supplying the continuous voltage. Application in particular to RFID passive transponders.
    Type: Grant
    Filed: February 27, 2008
    Date of Patent: September 20, 2011
    Assignee: STMicroelectronics SA
    Inventors: Pierre Rizzo, Christophe Moreaux, David Naura, Ahmed Kari
  • Patent number: 7881124
    Abstract: A method is provided for block writing in an electrically programmable non-volatile memory, in which a block to be written in the memory includes at least one word. The method includes determining a word write time by dividing a fixed block write time by the number of words in the block to be written, and controlling the memory to successively write each word in the memory during the write time.
    Type: Grant
    Filed: April 2, 2008
    Date of Patent: February 1, 2011
    Assignee: STMicroelectronics SA
    Inventors: Ahmed Kari, Christophe Moreaux, David Naura, Pierre Rizzo
  • Patent number: 7801940
    Abstract: A method divides a number N1 by a number which can be written in the form 2n/k, n and k being whole numbers, and obtains a result N2. The result N2 is calculated by adding terms N1*Ki/2n-i for i ranging from 0 to N, the terms Ki being the constituent bits K0, K1, K2, . . . KN-1 of the number k expressed in binary. The method can be applied particularly to the production of a calibration circuit for calibrating a clock signal in a UHF transponder.
    Type: Grant
    Filed: December 19, 2006
    Date of Patent: September 21, 2010
    Assignee: STMicroelectronics SA
    Inventors: Christophe Moreaux, Ahmed Kari, David Naura, Pierre Rizzo
  • Patent number: 7679945
    Abstract: A persistent volatile memory cell memorizes a binary datum during a retention time independent from a supply voltage of the memory cell. The memory cell comprises a capacitive memory point supplying a persistent voltage and having a determined discharge time, a switch for triggering the discharge of the memory point when an erase signal has an active value, a switch for triggering the charge of the memory point when a write signal has an active value, and a sense-amplifier circuit having an input receiving the persistent voltage, and an output supplying the binary datum. The memory cell can be applied to the management of an inventory flag in a contactless integrated circuit.
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: March 16, 2010
    Assignee: STMicroelectronics SA
    Inventors: Pierre Rizzo, Christophe Moreaux, David Naura, Ahmed Kari
  • Patent number: 7675341
    Abstract: A method and device for generating a clock signal, the method including measuring, using a first clock signal, a characteristic of a reference event in a received signal, determining, using the first clock signal, a variation of a characteristic of a second event in a received signal, correcting the measurement according to the variation of the characteristic of the second event, and generating a second clock signal using the first clock signal according to the corrected measurement.
    Type: Grant
    Filed: March 3, 2008
    Date of Patent: March 9, 2010
    Assignee: STMicroelectronics SA
    Inventors: Christophe Moreaux, Ahmed Kari, David Naura, Pierre Rizzo
  • Patent number: 7602878
    Abstract: A binary frequency divider includes a counter paced by an input signal, means for comparing a counting value with first and second threshold values and supplying first and second control signals synchronized with variation edges of a first type of the input signal. The divider includes means for supplying at least one third control signal shifted by a half-period of the input signal in relation to one of the first or second control signals, and control means for generating the output signal using control signals chosen according to the value of at least one least significant bit of the division setpoint. Application is mainly but not exclusively to UHF transponders.
    Type: Grant
    Filed: June 18, 2008
    Date of Patent: October 13, 2009
    Assignee: STMicroelectronics S.A.
    Inventors: Christophe Moreaux, Ahmed Kari, David Naura, Pierre Rizzo
  • Publication number: 20090094410
    Abstract: A method is provided for block writing in an electrically programmable non-volatile memory, in which a block to be written in the memory includes at least one word. The method includes determining a word write time by dividing a fixed block write time by the number of words in the block to be written, and controlling the memory to successively write each word in the memory during the write time.
    Type: Application
    Filed: April 2, 2008
    Publication date: April 9, 2009
    Applicant: STMICROELECTRONICS S.A.
    Inventors: Ahmed Kari, Christophe Moreaux, David Naura, Pierre Rizzo
  • Publication number: 20090066483
    Abstract: A passive contactless integrated circuit includes an electrically programmable non-volatile data memory (MEM), a charge accumulation booster circuit for supplying a high voltage necessary for writing data in the memory. The integrated circuit includes a volatile memory point for memorizing an indicator flag, and circuitry for modifying the value of the indicator flag when the high voltage reaches a critical threshold for the first time after activating the booster circuit.
    Type: Application
    Filed: March 6, 2008
    Publication date: March 12, 2009
    Applicant: STMicroelectronics S.A.
    Inventors: David Naura, Christophe Moreaux, Ahmed Kari, Pierre Rizzo
  • Publication number: 20090022260
    Abstract: A binary frequency divider includes a counter paced by an input signal, means for comparing a counting value with first and second threshold values and supplying first and second control signals synchronized with variation edges of a first type of the input signal. The divider includes means for supplying at least one third control signal shifted by a half-period of the input signal in relation to one of the first or second control signals, and control means for generating the output signal using control signals chosen according to the value of at least one least significant bit of the division setpoint. Application is mainly but not exclusively to UHF transponders.
    Type: Application
    Filed: June 18, 2008
    Publication date: January 22, 2009
    Applicant: STMicroelectronics S.A.
    Inventors: Christophe Moreaux, Ahmed Kari, David Naura, Pierre Rizzo
  • Patent number: 7472274
    Abstract: A method and a system for authenticating an electronic tag by a host communicating with this tag via a reader, including: calculating, on the tag side, a first digital signature using at least one first function shared by the tag and the reader, taking into account at least one first secret key known by the electronic tag and the reader only; transmitting the first signature to the reader; calculating, on the reader side, a second digital signal using at least one second function, different from the first function and shared by the reader and the host, taking the first signature into account; transmitting the second signature to the host; and checking, on the host side, the coherence between the second signature and a validation value calculated based on said second function and on a second secret key known by the host and by a single element selected from among the tag and the reader.
    Type: Grant
    Filed: June 12, 2003
    Date of Patent: December 30, 2008
    Assignee: STMicrolectronics S.A.
    Inventors: Christophe Moreaux, Claude Anguille