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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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公开(公告)号：US20190044770A1
公开(公告)日：2019-02-07
申请号：US16156155
申请日：2018-10-10
Inventor： Maksimiljan Stiglic , Kosta Kovacic
Abstract: A method of wireless communication includes transmitting frames from a transponder to a reader and synchronizing between a reader carrier frequency and an active load modulation (ALM) carrier frequency within each transmitted frame. Each transmitted frame includes ALM carrier bursts generated from subcarrier modulation by binary phase shift keying (BPSK) data encoding and producing signal oscillations at a transponder antenna after each ALM carrier burst generation, The synchronizing occurs at each phase change of the data encoding when no burst is generated during a half period of the subcarrier preceding the phase change and a half period of the subcarrier following this phase change. The transponder antenna has a moderate quality factor sufficient to naturally damp the signal oscillations so that the synchronizing is performed without performing any controlled signal oscillations damping.
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公开(公告)号：US20180324012A1
公开(公告)日：2018-11-08
申请号：US15966948
申请日：2018-04-30
Inventor： Maksimiljan Stiglic , Kosta Kovacic
CPC classification number: H04L27/2071 , G06K19/0723 , H04B5/0056 , H04L27/04 , H04L27/361
Abstract: A method of wireless communication includes transmitting frames from a transponder to a reader and synchronizing between a reader carrier frequency and an active load modulation (ALM) carrier frequency within each transmitted frame. Each transmitted frame includes ALM carrier bursts generated from subcarrier modulation by binary phase shift keying (BPSK) data encoding and producing signal oscillations at a transponder antenna after each ALM carrier burst generation, The synchronizing occurs at each phase change of the data encoding when no burst is generated during a half period of the subcarrier preceding the phase change and a half period of the subcarrier following this phase change. The transponder antenna has a moderate quality factor sufficient to naturally damp the signal oscillations so that the synchronizing is performed without performing any controlled signal oscillations damping.
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公开(公告)号：EP3672091A1
公开(公告)日：2020-06-24
申请号：EP18213835.4
申请日：2018-12-19
Inventor： ROZMAN, Jernej , SVETE, Tilen
IPC: H04B5/00
Abstract: The present disclosure relates to a circuit (3) comprising: an In-phase Quadrature down converter (16) capable of being coupled to an antenna of a first NFC device (1); dc cancellation circuits (321, 381; 32Q, 38Q) coupled at outputs of said converter; and a circuitry (341, 34Q, 36) for analyzing dc signals outputted by said dc cancellation circuits to detect the presence of a second NFC device (2) .
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公开(公告)号：EP4270804A1
公开(公告)日：2023-11-01
申请号：EP22170024.8
申请日：2022-04-26
Inventor： KOROSAK., Ziga
IPC: H04B5/00
Abstract: Method for managing a signal transmission emitted by a wireless transponder (TG) to a reader (RD), said transmission using an active load modulation and being based on transmitted bursts (TXBST) separated by pause periods (PP), each transmitted burst (TXBST) including transmitted pulses (TXP), said method comprising
-performing an active damping operation (ST64) at the end of said transmitted bursts in the beginning of the pause periods, said active damping operation comprising transmitting a number of additional pulses (DPI, DP2, DP3) having a phase opposite to the phase of said transmitted pulses (TXP), and
-controlling the transmitted pulses power (PWS), the additional pulses power (Dampi), the number of additional pulses (N) based on a distance (D) between the reader and the wireless transponder and on reference values of the transmitted pulses power, the additional pulses power, and the number respectively associated with reference distances.-
Patent Agency Ranking36.发明公开
公开(公告)号：EP3945684A1
公开(公告)日：2022-02-02
申请号：EP21185198.5
申请日：2021-07-13
Inventor： HOUDEBINE, Marc , KOVACIC, Kosta , SIBILLE, Florent
Abstract: The device (DV) comprises a phase locked loop (PLL) and a frequency locked loop (FLL) having in common the same controlled oscillator (DCO). The device is firstly placed in the card emulation mode at the beginning of a communication between said contactless communication device (DV) and a contactless reader (RD), said firstly placing comprising synchronizing within the contactless device (DV), an ALM carrier frequency (DVCLK) with a reader carrier frequency (CLEX) by operating at least said phase locked loop (PLL), and upon reception by the contactless communication device of an indication sent by the reader indicating a further communication in a peer to peer mode with said reader, the device (DV) is secondly placed in the peer to peer mode, said secondly placing including deactivating the phase locked loop (PLL) and operating the frequency locked loop (FLL) with a reference clock signal (XOCLK) and a frequency set point (FR) depending on said reader carrier frequency and the frequency of the reference clock signal.
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37.发明公开
公开(公告)号：EP3584948A1
公开(公告)日：2019-12-25
申请号：EP18178584.1
申请日：2018-06-19
Inventor： STIGLIC, Maksimiljan , BRATUZ, Iztok , PEVEC, Albin , BENKOVIC, Roman
IPC: H04B5/00
Abstract: A method for decoding a data stream carried by a modulated signal (SIG), said signal being modulated according to one protocol belonging to the group including protocols A and B of ISO/IEC14443 standard and protocol F of JIS.X.6319 standard, comprising:
receiving said modulated signal (SIG), detecting said protocol and decoding said data stream in accordance with said protocol using a clock signal (CLK), wherein, whatever the detected protocol, said clock signal (CLK) is a clock signal extracted from said received modulated signal (SIG).-
公开(公告)号：EP4235500A1
公开(公告)日：2023-08-30
申请号：EP22158957.5
申请日：2022-02-25
Inventor： PEVEC, Albin , SUHADOLNIK, Nejc , KUNC, Vinko , STIGLIC, Maksimiljan
Abstract: The present disclosure relates to a linear voltage regulator (2) comprising: a first transistor (41) between a first input terminal (21), adapted to receive a first voltage (VCC), and an output terminal (28) adapted to provide a regulated voltage (VCC_OUT); a second transistor (45) between a second input terminal (26), adapted to receive a second voltage, and said output terminal; an amplifier of the difference between a third voltage proportional to the voltage at said output terminal, and a reference voltage (VREF), an output of said amplifier being selectively coupled to respective control terminals (44, 48) of said first and second transistors, said amplifier being supplied by a fourth voltage corresponding to the highest voltage between said first and second voltages.
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公开(公告)号：EP4209958A1
公开(公告)日：2023-07-12
申请号：EP22216803.1
申请日：2022-12-27
Applicant: STMICROELECTRONICS SA , STMicroelectronics (Rousset) SAS , STMicroelectronics razvoj polprevodnikov d.o.o.
Inventor： TRAMONI, Alexandre , KOVACIC, Kosta , SIBILLE, Florent , CORDIER, Nicolas , TORNAMBE, Anthony , RUIZ, Jean Remi , JAUNET, Guillaume
Abstract: La présente description concerne un procédé dans lequel un circuit de communication en champ proche d'un premier dispositif NFC alterne, en mode basse consommation, entre :
- des premières phases (PH1) d'émission de salves de champ ; et
- des deuxièmes phases couvrant toute la durée séparant deux premières phases (PH1) d'émission successives et comportant chacune une troisième phase (PH2) d'activation d'un détecteur de champ :
A) s'étendant pendant toute la deuxième phase ; ou
B) entrecoupée de quatrièmes phases de désactivation du détecteur de champ présentant chacune une durée inférieure à la durée minimale des premières phases (PH1).-
公开(公告)号：EP4089880A1
公开(公告)日：2022-11-16
申请号：EP22172296.0
申请日：2022-05-09
Applicant: STMicroelectronics Ltd , STMicroelectronics (Rousset) SAS , STMicroelectronics razvoj polprevodnikov d.o.o.
Inventor： CORDIER, Nicolas , CHEN, Walk , BLAHA, Karel
Abstract: The present disclosure relates to a device comprising a frequency demodulator and an amplitude demodulator, the device being configured to use, in a first mode, both demodulators in parallel and to activate an RFID card mode or a Qi charger mode based on results provided by said demodulators.
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