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公开(公告)号：US11736148B2
公开(公告)日：2023-08-22
申请号：US17385122
申请日：2021-07-26
Inventor： Marc Houdebine , Kosta Kovacic , Florent Sibille
CPC classification number: H04B5/0056 , H04L7/0331 , H04L7/04
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：US20180343037A1
公开(公告)日：2018-11-29
申请号：US15989554
申请日：2018-05-25
Inventor： Alexandre Tramoni , Maksimiljan Stiglic , Kosta Kovacic
IPC: H04B5/00
Abstract: A near field communication (NFC) method includes activating an NFC device second device in response to a first electromagnetic field generated by a nearby NFC device. The NFC device generates a second electromagnetic field after being activated. The first NFC device can detect the second electromagnetic field and initiate a near field communication process.
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公开(公告)号：US11663435B2
公开(公告)日：2023-05-30
申请号：US17096480
申请日：2020-11-12
Inventor： Kosta Kovacic , Alexandre Tramoni
CPC classification number: G06K19/0701 , G06K7/0008 , H02J50/80 , H04B5/0037
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：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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Patent Agency Ranking
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：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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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：US11012118B2
公开(公告)日：2021-05-18
申请号：US15989554
申请日：2018-05-25
Inventor： Alexandre Tramoni , Maksimiljan Stiglic , Kosta Kovacic
IPC: H04B5/00
Abstract: A near field communication (NFC) method includes activating an NFC device second device in response to a first electromagnetic field generated by a nearby NFC device. The NFC device generates a second electromagnetic field after being activated. The first NFC device can detect the second electromagnetic field and initiate a near field communication process.
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