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公开(公告)号：US20220263542A1
公开(公告)日：2022-08-18
申请号：US17651322
申请日：2022-02-16
Inventor： Gustavo Jose Henriques Patricio , Anton Stem
Abstract: The disclosure relates to a modified NFC framing is used by a reader and selected devices during at least a part of the communication between the reader and the selected devices. The reader and the selected devices store modification rules for modifying the frames. Devices not storing those modification rules will discard the received modified frames.
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公开(公告)号：US20210158120A1
公开(公告)日：2021-05-27
申请号：US17096480
申请日：2020-11-12
Inventor： Kosta Kovacic , Alexandre Tramoni
Abstract: In an embodiment a method for dynamic power control of a power level transmitted by an antenna of a contactless reader is disclosed. The method may include supplying a power to the antenna and performing at least one power adjusting cycle for adjusting a power level during a contactless transaction with a transponder, each power adjusting cycle including modifying the power supplied to the antenna to a predetermined level of power, performing a first measuring of a loading effect on the antenna at the predetermined level of power and adjusting the power level according to the measured loading effect.
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公开(公告)号：US10608854B2
公开(公告)日：2020-03-31
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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14.发明授权公开(公告)号：US10560255B2
公开(公告)日：2020-02-11
申请号：US16029457
申请日：2018-07-06
Inventor： Maksimiljan Stiglic , Nejc Suhadolnik , Marc Houdebine
Abstract: A transponder communicates with a reader using active load modulation. The transponder includes a digital phase locked loop (DPLL), which, in operation, generates an active load modulation (ALM) carrier clock synchronized to carrier clock of the reader. Between transmission of data frames, the DPLL is placed in a lock mode of operation in which a feedback loop of the DPLL is closed. Within a transmitted data frame having a duration, the DPLL is placed, for the duration of the transmitted data frame, in a hold mode of operation in which the feedback loop is opened. A phase of the ALM carrier clock is adjusted at least once during the duration of the transmitted data frame.
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公开(公告)号：US11770156B2
公开(公告)日：2023-09-26
申请号：US17651322
申请日：2022-02-16
Inventor： Gustavo Jose Henriques Patricio , Anton Stem
CPC classification number: H04B5/0031 , H04W4/80 , H04W48/16
Abstract: The disclosure relates to a modified NFC framing is used by a reader and selected devices during at least a part of the communication between the reader and the selected devices. The reader and the selected devices store modification rules for modifying the frames. Devices not storing those modification rules will discard the received modified frames.
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Patent Agency Ranking
公开(公告)号：US20230273634A1
公开(公告)日：2023-08-31
申请号：US18158170
申请日：2023-01-23
Inventor： Albin Pevec , Nejc Suhadolnik , Vinko Kunc , Maksimiljan Stiglic
IPC: G05F1/575
CPC classification number: G05F1/575
Abstract: In accordance with an embodiment, a linear voltage regulator includes: a first transistor coupled between a first input terminal and an output terminal, the first input terminal adapted to receive a first voltage, and the output terminal adapted to provide a regulated voltage; a second transistor coupled between a second input terminal and the output terminal, the second input terminal adapted to receive a second voltage; and an amplifier of a difference between a third voltage proportional to the voltage at the output terminal and a reference voltage, an output of said amplifier being selectively coupled to a control terminal of the first transistor and to a control terminal of the second transistor, the amplifier being supplied by a fourth voltage corresponding to a highest voltage of the first voltage and the second voltage.
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公开(公告)号：US11444591B2
公开(公告)日：2022-09-13
申请号：US16915766
申请日：2020-06-29
Applicant: STMicroelectronics SA , STMicroelectronics (Alps) SAS , STMicroelectronics razvoj polprevodnikov d.o.o.
Inventor： Kosta Kovacic , Christophe Grundrich , Bruno Leduc , Anton Stern
Abstract: A method for controlling a signal envelope shape of modulation pulses in a driver of a wireless transmitter includes supplying a first voltage to the driver during a non-modulated state, supplying a second voltage configurable by a configurable modulation index value to the driver during a modulated state, switching between the non-modulated state and the modulated state comprising setting the modulation index value to configure the second voltage level at the same level as the first voltage and then switching between supplying the first voltage to the driver and supplying the second voltage to the driver, and filtering to a limited bandwidth the variations of the second voltage resulting from configuring the modulation index value.
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公开(公告)号：US20220029660A1
公开(公告)日：2022-01-27
申请号：US17385122
申请日：2021-07-26
Inventor： Marc Houdebine , Kosta Kovacic , Florent Sibille
Abstract: An embodiment device comprises a phase locked loop and a frequency locked loop having in common the same controlled oscillator. The device is firstly placed in the card emulation mode at the beginning of a communication between the contactless communication device and a contactless reader, the firstly placing comprising synchronizing within the contactless device, an ALM carrier frequency with a reader carrier frequency by operating at least the phase locked loop, 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 the reader, the device is secondly placed in the peer to peer mode, the secondly placing including deactivating the phase locked loop and operating the frequency locked loop with a reference clock signal and a frequency set point depending on the reader carrier frequency and the frequency of the reference clock signal.
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公开(公告)号：US11228344B2
公开(公告)日：2022-01-18
申请号：US16702902
申请日：2019-12-04
Inventor： Jernej Rozman , Tilen Svete
IPC: H04B5/00
Abstract: A circuit includes an in-phase/quadrature down converter configured to be coupled to an antenna of a first NFC (near field communication) device. DC cancellation circuitry is coupled at outputs of the converter. Detection circuitry is configured to analyze DC signals output by the DC cancellation circuits to detect the presence of a second NFC device.
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公开(公告)号：US20210006215A1
公开(公告)日：2021-01-07
申请号：US16915766
申请日：2020-06-29
Applicant: STMicroelectronics SA , STMicroelectronics (Alps) SAS , STMicroelectronics razvoj polprevodnikov d.o.o.
Inventor： Kosta Kovacic , Christophe Grundrich , Bruno LEDUC , Anton Stern
Abstract: A method for controlling a signal envelope shape of modulation pulses in a driver of a wireless transmitter includes supplying a first voltage to the driver during a non-modulated state, supplying a second voltage configurable by a configurable modulation index value to the driver during a modulated state, switching between the non-modulated state and the modulated state comprising setting the modulation index value to configure the second voltage level at the same level as the first voltage and then switching between supplying the first voltage to the driver and supplying the second voltage to the driver, and filtering to a limited bandwidth the variations of the second voltage resulting from configuring the modulation index value.
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