Patents by Inventor Jacques Reverdy
Jacques Reverdy 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).
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Patent number: 10802172Abstract: A system for detecting a specific relative position between a reader and a receiver, including: an inductive contactless receiver including an antenna winding and a circuit for selectively modulating a load; an inductive contactless reader including: a transceiver antenna circuit having nonzero mutual inductance with the antenna winding for the position, a communication circuit connected to the transceiver antenna circuit, a receiver antenna circuit having mutual inductance with the antenna winding that exhibits a minimum for the position, and a processing circuit for: identifying presence of a receiver by detecting nonzero mutual inductance between the transceiver antenna circuit and an antenna winding, and detecting a mutual inductance minimum between the receiver antenna circuit and an antenna winding.Type: GrantFiled: July 27, 2017Date of Patent: October 13, 2020Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Thierry Thomas, Jacques Reverdy
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Publication number: 20200249372Abstract: A system for detecting a specific relative position between a reader and a receiver, including: an inductive contactless receiver including an antenna winding and a circuit for selectively modulating a load; an inductive contactless reader including: a transceiver antenna circuit having nonzero mutual inductance with the antenna winding for the position, a communication circuit connected to the transceiver antenna circuit, a receiver antenna circuit having mutual inductance with the antenna winding that exhibits a minimum for the position, and a processing circuit for: identifying presence of a receiver by detecting nonzero mutual inductance between the transceiver antenna circuit and an antenna winding, and detecting a mutual inductance minimum between the receiver antenna circuit and an antenna winding.Type: ApplicationFiled: July 27, 2017Publication date: August 6, 2020Inventors: Thierry THOMAS, Jacques REVERDY
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Patent number: 9719876Abstract: This fluid pressure sensor includes a coil the self inductance of which varies as a function of the pressure of a fluid inside the flexible pipe. This coil includes a turn including: a first portion and a second portion of its periphery rigidly mechanically connected to a first location and a second location on the periphery of the pipe, respectively, and third and fourth free portions of the periphery of the turn situated between the first and second portions and each on a respective side of a central axis of the pipe and each separated from the flexible pipe by a clearance.Type: GrantFiled: August 18, 2015Date of Patent: August 1, 2017Assignee: Commissariat A L'Energie Atomique et aux Energies AlternativesInventors: Jacques Reverdy, Thierry Thomas
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Publication number: 20160061678Abstract: This fluid pressure sensor includes a coil the self inductance of which varies as a function of the pressure of a fluid inside the flexible pipe. This coil includes a turn including: a first portion and a second portion of its periphery rigidly mechanically connected to a first location and a second location on the periphery of the pipe, respectively, and third and fourth free portions of the periphery of the turn situated between the first and second portions and each on a respective side of a central axis of the pipe and each separated from the flexible pipe by a clearance.Type: ApplicationFiled: August 18, 2015Publication date: March 3, 2016Applicant: Commissariat A L'Energie Atomique et aux Energies AlternativesInventors: Jacques REVERDY, Thierry Thomas
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Patent number: 9019031Abstract: A method for phase modulation of a carrier signal from a transmitter to a contactless transponder in which data is coded as consecutive symbols, each corresponding to a predefined number of carrier cycles, and in which a symbol time is at least two cycles of the carrier signal includes, at the transmitter, spreading a phase jump of a symbol in relation to a preceding symbol over a first part of the symbol time. The establishment of the phase jump is completed in the first part of the symbol time. The periods of the cycles are constant during a second part of the symbol time.Type: GrantFiled: June 24, 2011Date of Patent: April 28, 2015Assignee: Commissariat à l'énergie atomique et aux énergies alternativesInventors: Jacques Reverdy, Elisabeth Crochon, Francois Dehmas, Florian Pebay-Peyroula
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Patent number: 8800878Abstract: The invention relates to a method for encoding contactless communication data from a transponder to a reader via charge modulation, in the form of a set of modulation patterns, each modulation pattern being a series of charge levels of a predefined length used for physical encoding, having a duration of n carrier periods (Tc), including a series of at least two charge levels, having a minimum pulse width (w) corresponding to the shortest duration of a single charge level in the pattern, and having a retromodulation rate (t) corresponding to the ratio between the retromodulation time and the duration of a pattern, characterized in that the number (k) of patterns is greater than four, the minimum pulse widths (w) of at least two patterns are different, and the retromodulation rates (t) of at least two patterns are different. The invention also relates to a device for implementing the method.Type: GrantFiled: October 19, 2010Date of Patent: August 12, 2014Assignee: Commissariat a l'Energie Atomique et aux Energies AlternativesInventors: Florian Pebay-Peyroula, Elisabeth Crochon, Jacques Reverdy, Thierry Thomas
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Patent number: 8773241Abstract: A transponder of a contactless data exchange system includes a unit to receive and transmit data provided with at least one first antenna loop and at least one second antenna loop in order to carry out a coupling with a reader. The transponder includes a phase shifter to shift a signal coming from the second loop by a phase shift of K*?, K being an odd integer greater than 0, to produce a phase shifted signal. The transponder includes an adder, to add a signal coming from said first loop and the phase shifted signal to produce a sum signal. The transponder also includes a unit to authorize or prevent a data transmission, depending on the sum signal. A reader of a contactless data exchange system includes a data sending/receiving unit provided with at least one antenna loop, at least one other antenna loop, and a phase shifter.Type: GrantFiled: December 15, 2010Date of Patent: July 8, 2014Assignee: Commissariat à l'énergie atomique et aux énergies alternativesInventors: Sylvain Bacquet, Ricardo Malherbi Martins, Jacques Reverdy, Elisabeth Crochon
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Publication number: 20130154756Abstract: A method for phase modulation of a carrier signal from a transmitter to a contactless transponder in which data is coded as consecutive symbols, each corresponding to a predefined number of carrier cycles, and in which a symbol time is at least two cycles of the carrier signal includes, at the transmitter, spreading a phase jump of a symbol in relation to a preceding symbol over a first part of the symbol time. The establishment of the phase jump is completed in the first part of the symbol time. The periods of the cycles are constant during a second part of the symbol time.Type: ApplicationFiled: June 24, 2011Publication date: June 20, 2013Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIESInventors: Jacques Reverdy, Elisabeth Crochon, Francois Dehmas, Florian Pebay-Peyroula
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Publication number: 20120234928Abstract: The invention relates to a method for encoding contactless communication data from a transponder to a reader via charge modulation, in the form of a set of modulation patterns, each modulation pattern being a series of charge levels of a predefined length used for physical encoding, having a duration of n carrier periods (TC), including a series of at least two charge levels, having a minimum pulse width (w) corresponding to the shortest duration of a single charge level in the pattern, and having a retromodulation rate (t) corresponding to the ratio between the retromodulation time and the duration of a pattern, characterized in that the number (k) of patterns is greater than four, the minimum pulse widths (w) of at least two patterns are different, and the retromodulation rates (t) of at least two patterns are different. The invention also relates to a device for implementing the method.Type: ApplicationFiled: October 19, 2010Publication date: September 20, 2012Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIE ALTERNATIVESInventors: Florian Pebay-Peyroula, Elisabeth Crochon, Jacques Reverdy, Thierry Thomas
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Patent number: 8045640Abstract: The invention relates to a method for demodulating information emitted by amplitude modulation with two levels by a reader (2) to a transponder (4), comprising a step to determine if this symbol is identical to or is different from the previous symbol, after each symbol.Type: GrantFiled: March 21, 2006Date of Patent: October 25, 2011Assignee: Commissariat A l'Energie AtomiqueInventors: Gérard Robert, François Dehmas, Elisabeth Crochon, Jacques Reverdy
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Publication number: 20110148588Abstract: The invention relates to a contactless data exchange system provided with a transponder comprising: a unit for receiving and transmitting data provided with at least one first antenna loop (110a, 210a) and at least one second antenna loop (110b, 210b) in order to carry out a coupling with a reader (2), means (216, 224a, 224b, 115, 116) pour authorising or preventing the data transmission according to the phase shift (??) between a first signal received by the first loop and a second signal received by the second loop.Type: ApplicationFiled: December 15, 2010Publication date: June 23, 2011Applicant: COMM. A L'ENER. ATOM. ET AUX ENERGIES ALT.Inventors: Sylvain BACQUET, Ricardo Malherbi Martins, Jacques Reverdy, Elisabeth Crochon
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Patent number: 7671670Abstract: The invention relates to a device for demodulating an input signal containing information being conveyed by phase modulation of a carrier wave. A transmitter generates a signal controlling a phase variation in the carrier wave, for each symbol having N cycles, N being an integer strictly greater than 1. The phase variation stretches on the receiver side over n cycles, n being an integer greater than 1 and less than N. The device generates a single pulse for each symbol received suited to generate the leading edge of the pulse corresponding to the symbol considered after a constant duration from the moment the symbol considered starts; and generates the trailing edge of the pulse considered at a moment the phase shift corresponding to the symbol considered has to be measured. Conversion means generate an output signal with a voltage varying as a function of the duration of the pulse produced.Type: GrantFiled: June 13, 2008Date of Patent: March 2, 2010Assignee: Commissariat a l'Energie AtomiqueInventors: Gilles Masson, Jacques Reverdy
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Patent number: 7525374Abstract: The invention relates to a method for demodulating information emitted by amplitude modulation by a reader (2) to a transponder (4) comprising: a step to compare variations of a slaving voltage (Vc) of the transponder (4) with threshold values, and to transform the result of this comparison into an authorized modulation level skip value, a step to add this skip to a previous first modulation level to determine a second modulation level.Type: GrantFiled: March 21, 2006Date of Patent: April 28, 2009Assignee: Commissariat A l'Energie AtomiqueInventors: Gérard Robert, François Dehmas, Elisabeth Crochon, Jacques Reverdy
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Publication number: 20090045871Abstract: The invention relates to a device for demodulating an input signal containing information being conveyed by phase modulation of a carrier wave. A transmitter generates a signal controlling a phase variation in the carrier wave, for each symbol having N cycles, N being an integer strictly greater than 1. The phase variation stretches on the receiver side over n cycles, n being an integer greater than 1 and less than N. The device generates a single pulse for each symbol received suited to generate the leading edge of the pulse corresponding to the symbol considered after a constant duration from the moment the symbol considered starts; and generates the trailing edge of the pulse considered at a moment the phase shift corresponding to the symbol considered has to be measured. Conversion means generate an output signal with a voltage varying as a function of the duration of the pulse produced.Type: ApplicationFiled: June 13, 2008Publication date: February 19, 2009Applicant: THALESInventors: Gilles MASSON, Jacques Reverdy
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Patent number: 7409026Abstract: A device and method for estimating a phase reference or a phase shift of a S1 with respect to another reference signal S0.Type: GrantFiled: March 16, 2005Date of Patent: August 5, 2008Assignee: Commissariat A l'Energie AtomiqueInventors: Jacques Reverdy, Elisabeth Crochon, Gerard Robert, Thierry Thomas
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Patent number: 7319844Abstract: Each device (1a, 1b, 1c) comprises a processing circuit connected to a first antenna (4), designed to be coupled to an external antenna (3, 5), and a second antenna (5) designed to be coupled to an antenna (4) of a higher-ranking device (1). The system comprises a reading unit and devices (1) having a predetermined ranking. The first antenna (4a) of the rank one device (1a) is coupled to an antenna (3) of the reading unit. Addressing by the reading unit of a device (1c) ranking higher than one is performed by means of the associated lower-ranking devices (1a, 1b). A device (1a1) of predetermined ranking is associated with a sub-set (8a) of higher-ranking devices (1b11, 1b12) so as to form a hierarchical tree structure.Type: GrantFiled: September 13, 2004Date of Patent: January 15, 2008Assignee: Commissariat a l'Energie AtomiqueInventors: Elisabeth Crochon, Yann Têtu, Jacques Reverdy
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Publication number: 20060284726Abstract: Each device (1a, 1b, 1c) comprises a processing circuit connected to a first antenna (4), designed to be coupled to an external antenna (3, 5), and a second antenna (5) designed to be coupled to an antenna (4) of a higher-ranking device (1). The system comprises a reading unit and devices (1) having a predetermined ranking. The first antenna (4a) of the rank one device (1a) is coupled to an antenna (3) of the reading unit. Addressing by the reading unit of a device (1c) ranking higher than one is performed by means of the associated lower-ranking devices (1a, 1b). A device (1a1) of predetermined ranking is associated with a sub-set (8a) of higher-ranking devices (1b11, 1b12) so as to form a hierarchical tree structure.Type: ApplicationFiled: September 13, 2004Publication date: December 21, 2006Applicant: Commissariat a l'Energie AtomiqueInventors: Elisabeth Crochon, Yann Tetu, Jacques Reverdy
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Publication number: 20060225555Abstract: The invention relates to a method for demodulating information emitted by amplitude modulation by a reader (2) to a transponder (4) comprising: a step to compare variations of a slaving voltage (Vc) of the transponder (4) with threshold values, and to transform the result of this comparison into an authorized modulation level skip value, a step to add this skip to a previous first modulation level to determine a second modulation level.Type: ApplicationFiled: March 21, 2006Publication date: October 12, 2006Inventors: Gerard Robert, Francois Dehmas, Elisabeth Crochon, Jacques Reverdy
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Publication number: 20060221477Abstract: The invention relates to a method for demodulating information emitted by amplitude modulation with two levels by a reader (2) to a transponder (4), comprising a step to determine if this symbol is identical to or is different from the previous symbol, after each symbol.Type: ApplicationFiled: March 21, 2006Publication date: October 5, 2006Inventors: Gerard Robert, Francois Dehmas, Elisabeth Crochon, Jacques Reverdy
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Publication number: 20050207484Abstract: This invention relates to a device and method for estimating a phase reference or a phase shift of a S1 with respect to another reference signal S0.Type: ApplicationFiled: March 16, 2005Publication date: September 22, 2005Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUEInventors: Jacques Reverdy, Elisabeth Crochon, Gerard Robert, Thierry Thomas