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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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Patent Agency Ranking
公开(公告)号：US10122557B1
公开(公告)日：2018-11-06
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：US12081286B2
公开(公告)日：2024-09-03
申请号：US16587419
申请日：2019-09-30
Inventor： Francois Agut , Severin Trochut , Vinko Kunc
CPC classification number: H04B5/24 , G06K19/0725 , G08C17/02 , H02M3/33576
Abstract: A reader is adapted to wirelessly exchanging information with a wireless apparatus. The reader includes a signal generator configured to generate a modulation signal. An emitter/receptor stage is configured to be driven by the modulation signal. A switched-mode power supply is configured to power the emitter/receptor stage. The switched-mode power supply includes a power switch controlled in function of the modulation signal.
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公开(公告)号：US20230387965A1
公开(公告)日：2023-11-30
申请号：US18446224
申请日：2023-08-08
Inventor： Gustavo Jose Henriques Patricio , Anton Stern
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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公开(公告)号：US20230344468A1
公开(公告)日：2023-10-26
申请号：US18298914
申请日：2023-04-11
Inventor： Ziga Korosak
CPC classification number: H04B5/0068 , H03L7/08
Abstract: A method for managing a signal transmission emitted by a wireless transponder to a reader is provided in which the signal transmission uses an active load modulation and includes transmitted bursts separated by pause periods. Each transmitted burst includes transmitted pulses. The method includes performing an active damping operation at the end of the transmitted bursts in the beginning of the pause periods, and the active damping operation includes transmitting a number of additional pulses having a phase opposite to the phase of the transmitted pulses. The transmitted pulses power, the additional pulses power, and the number of additional pulses are controlled based on a distance 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.
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公开(公告)号：US20230223989A1
公开(公告)日：2023-07-13
申请号：US18094309
申请日：2023-01-06
Applicant: STMicroelectronics (Rousset) SAS , STMicroelectronics SA , STMicroelectronics Razvoj Polprevodnikov D.O.O.
Inventor： Alexandre TRAMONI , Kosta KOVACIC , Florent SIBILLE , Nicolas CORDIER , Anthony TORNAMBE , Jean Remi RUIZ , Guillaume JAUNET
IPC: H04B5/00
CPC classification number: H04B5/0025 , H04B5/0056
Abstract: A near-field communication circuit of a first NFC device alternates, in low power mode, between: first phases of emission of field bursts and second phases spanning an entire duration separating two successive first phases. Each second phase includes a field detector enabling phase. In one implementation, the field detector enabling phase extends all along a duration of the second phase. In an alternate implementation, the field detector enabling phase is interrupted by field detector disabling phases. Each field detector disabling phase has a duration shorter than a minimum duration of each first phase.
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