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公开(公告)号：US20190181919A1
公开(公告)日：2019-06-13
申请号：US16211964
申请日：2018-12-06
Applicant: STMicroelectronics (Rousset) SAS
Inventor： Alexandre Tramoni , Nicolas Cordier , Anthony Tornambe
Abstract: A method of detection of the presence, by a first NFC device, of a second NFC device, during periodic field emission bursts, where detection thresholds are adjusted according to results obtained during one or a plurality of previous bursts.
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公开(公告)号：US11595081B2
公开(公告)日：2023-02-28
申请号：US16899218
申请日：2020-06-11
Applicant: STMicroelectronics (Rousset) SAS
Inventor： Alexandre Tramoni , Nicolas Cordier
Abstract: A circuit for a communication device and a method for switching a communication device are disclosed. In an embodiment, a method includes activating at least one first antenna and at least one second antenna of a near-field communication (NFC) device for switching the NFC device between first field detection phases and second card detection phases.
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公开(公告)号：US20190067818A1
公开(公告)日：2019-02-28
申请号：US16114994
申请日：2018-08-28
Applicant: STMicroelectronics (Rousset) SAS
Inventor： Nicolas Cordier
Abstract: A circuit for driving an antenna of near field communication (NFC) device, includes: a first variable resistor coupled to a first terminal of the antenna via a first capacitor; a second variable resistor coupled to a second terminal of the antenna via a second capacitor; and a control circuit configured to cause the first variable resistor and the second variable resistor to each have a selected one of a first resistance level, a second resistance level, and a third resistance level based on an operating phase of the circuit.
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公开(公告)号：US20180358680A1
公开(公告)日：2018-12-13
申请号：US15951774
申请日：2018-04-12
Inventor： Alexandre Tramoni , Nicolas Cordier , Maksimiljan Stiglic
CPC classification number: H01Q1/002 , G01R21/00 , G06K7/10 , H04B5/0025 , H04W52/00
Abstract: In some embodiments, a contactless communication device includes an antenna, and a driving stage having a power supply terminal configured to receive a power supply voltage, where the driving stage is configured to deliver a current to the antenna. The device further includes a monitoring circuit configured to monitor the power transmitted by the antenna. The monitoring circuit is configured, in the presence of a request for a reduction in a current level of transmitted power, to reduce the power supply voltage of the driving stage down to a target value corresponding to a new level of the transmitted power less than the current level.
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公开(公告)号：US11949252B2
公开(公告)日：2024-04-02
申请号：US17571705
申请日：2022-01-10
Applicant: STMicroelectronics (Rousset) SAS
Inventor： Anthony Tornambe , Nicolas Cordier
Abstract: A contactless device includes an impedance matching and filter circuit connected to an antenna and being on the one hand operable for contactlessly communicating with a second device via the antenna, and on the other hand operable for contactlessly charging a rechargeable power supply of a third device via the antenna. A method of control includes modifying the impedance matching and filter circuit of the contactless device depending on whether the contactless device carries out the contactless communication or carries out the contactless charging.
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Patent Agency Ranking
公开(公告)号：US11855713B2
公开(公告)日：2023-12-26
申请号：US17701416
申请日：2022-03-22
Applicant: STMICROELECTRONICS (ROUSSET) SAS
Inventor： Nicolas Cordier
IPC: H04B5/00 , H04B17/318
CPC classification number: H04B5/0031 , H04B17/318
Abstract: The present disclosure relates to a method implemented by a first NFC device, wherein the establishment of a transaction with a second NFC device configured in reader mode is performed when the signal level received by the first device, configured in card mode, reaches a first threshold, depending on the type of modulation technology of the second device.
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公开(公告)号：US11126805B2
公开(公告)日：2021-09-21
申请号：US16374837
申请日：2019-04-04
Applicant: STMicroelectronics (Rousset) SAS
Inventor： Anthony Tornambe , Nicolas Cordier
Abstract: An object is capable of contactless communication with a reader by active charge modulation. The object includes an antenna, an impedance matching circuit, a memory, and a controller connected to the antenna through the impedance matching circuit. The antenna, the an impedance matching circuit and the controller together form a resonant circuit having a resonant frequency. The controller is configured to cause the object to transmit, in the absence of a signal received from a reader, a signal at the resonant frequency, to determine a characteristic obtained from the signal uniquely transmitted by the object, and to perform an adjustment of a phase shift within the object based on the characteristic and an indication stored in the memory, the indication linking values of phase shifts with values of the characteristic.
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公开(公告)号：US10938107B2
公开(公告)日：2021-03-02
申请号：US16114994
申请日：2018-08-28
Applicant: STMicroelectronics (Rousset) SAS
Inventor： Nicolas Cordier
Abstract: A circuit for driving an antenna of near field communication (NFC) device, includes: a first variable resistor coupled to a first terminal of the antenna via a first capacitor; a second variable resistor coupled to a second terminal of the antenna via a second capacitor; and a control circuit configured to cause the first variable resistor and the second variable resistor to each have a selected one of a first resistance level, a second resistance level, and a third resistance level based on an operating phase of the circuit.
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公开(公告)号：US20190325177A1
公开(公告)日：2019-10-24
申请号：US16374837
申请日：2019-04-04
Applicant: STMicroelectronics (Rousset) SAS
Inventor： Anthony Tornambe , Nicolas Cordier
Abstract: An object is capable of contactless communication with a reader by active charge modulation. The object includes an antenna, an impedance matching circuit, a memory, and a controller connected to the antenna through the impedance matching circuit. The antenna, the an impedance matching circuit and the controller together form a resonant circuit having a resonant frequency. The controller is configured to cause the object to transmit, in the absence of a signal received from a reader, a signal at the resonant frequency, to determine a characteristic obtained from the signal uniquely transmitted by the object, and to perform an adjustment of a phase shift within the object based on the characteristic and an indication stored in the memory, the indication linking values of phase shifts with values of the characteristic.
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公开(公告)号：US10326193B2
公开(公告)日：2019-06-18
申请号：US15951774
申请日：2018-04-12
Inventor： Alexandre Tramoni , Nicolas Cordier , Maksimiljan Stiglic
Abstract: In some embodiments, a contactless communication device includes an antenna, and a driving stage having a power supply terminal configured to receive a power supply voltage, where the driving stage is configured to deliver a current to the antenna. The device further includes a monitoring circuit configured to monitor the power transmitted by the antenna. The monitoring circuit is configured, in the presence of a request for a reduction in a current level of transmitted power, to reduce the power supply voltage of the driving stage down to a target value corresponding to a new level of the transmitted power less than the current level.
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