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公开(公告)号：US10911102B2
公开(公告)日：2021-02-02
申请号：US16793679
申请日：2020-02-18
Applicant: STMicroelectronics International N.V.
Inventor： Kosta Kovacic , Albin Pevec , Maksimiljan Stiglic
IPC: H04B5/00 , G06K7/00 , G06K19/07 , G06K19/077
Abstract: An RFID transponder includes a coding and modulation unit that generates a transmission signal by modulating an oscillator signal with an encoded bit signal. During a first and a second time segment, the encoded bit signal assumes a first and a second logic level, respectively. The transmission signal includes a first signal pulse having a first phase within the first time segment and a second signal pulse having a second phase that is shifted with respect to the first phase by a predefined phase difference within the second time segment. The transmission signal is paused for a pause period between the first and the second signal pulse. The pause period is shorter than a mean value of a period of the first time segment and a period of the second time segment.
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公开(公告)号：US20180025267A1
公开(公告)日：2018-01-25
申请号：US15473295
申请日：2017-03-29
Applicant: STMicroelectronics International N.V.
Inventor： Vinko Kunc , Iztok Bratuz , Albin Pevec , Kosta Kovacic , Maksimiljan Stiglic
IPC: G06K19/07 , G06K19/077
CPC classification number: G06K19/0724 , G06K19/0772 , G06K19/0775 , H04L7/033
Abstract: In an embodiment, a carrier signal generation circuit can be used for a Radio-frequency identification (RFID) transponder device. A frequency divider circuit has a first input to receive a first frequency signal, a second input to receive a division ratio signal, and an output to provide a carrier signal as a function of the first frequency signal and the division ratio signal. A phase difference circuit has a first input to receive an analog reader device carrier signal, a second input to receive a signal based on the first frequency signal and an output to provide a digital phase difference signal as a function of the reader device carrier signal and the signal based on the first frequency signal. A signal processor has an input coupled to the output of the phase difference circuit.
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公开(公告)号：US12267190B2
公开(公告)日：2025-04-01
申请号：US18644590
申请日：2024-04-24
Applicant: STMicroelectronics International N.V.
Inventor： Iztok Bratuz , Vinko Kunc , Maksimiljan Stiglic
IPC: H04L25/49
Abstract: Various embodiments of the present disclosure disclose decoding techniques for mitigating data corruption due to duty cycle distortion, jitter, and other distortions to a digital signal. Decoding processes, apparatuses, and systems are provided that utilize a decoding framework for improving the accuracy of output bit streams generated from digital signals. An example process receives data indicative of a digital signal, generates a signal measurement for the digital signal that includes signal length descriptive between a two rising edges of a digital signal or two falling edges of the demodulated digital signal, and generates at least one portion of an output bit stream for the digital signal based at least in part on the signal measurement.
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公开(公告)号：US11991028B1
公开(公告)日：2024-05-21
申请号：US18059103
申请日：2022-11-28
Applicant: STMicroelectronics International N.V.
Inventor： Iztok Bratuz , Vinko Kunc , Maksimiljan Stiglic
IPC: H04L25/49
CPC classification number: H04L25/4904
Abstract: Various embodiments of the present disclosure disclose decoding techniques for mitigating data corruption due to duty cycle distortion, jitter, and other distortions to a digital signal. Decoding processes, apparatuses, and systems are provided that utilize a decoding framework for improving the accuracy of output bit streams generated from digital signals. An example process receives data indicative of a digital signal, generates a signal measurement for the digital signal that includes signal length descriptive between a two rising edges of a digital signal or two falling edges of the demodulated digital signal, and generates at least one portion of an output bit stream for the digital signal based at least in part on the signal measurement.
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公开(公告)号：US10296822B2
公开(公告)日：2019-05-21
申请号：US15894440
申请日：2018-02-12
Applicant: STMicroelectronics International N.V.
Inventor： Vinko Kunc , Anton Stern , Kosta Kovacic , Albin Pevec , Maksimiljan Stiglic
IPC: G06K19/07 , G06K19/077
Abstract: An RFID transponder device has antenna terminals for coupling an antenna system to the device. A transmitter and a receiver are coupled to the antenna terminals. The device has at least one damping resistance connected to at least one of the antenna terminals. The at least one damping resistance is connected, depending on a voltage swing at the antenna terminals during a transmission burst period, either together with a serially connected switch in parallel to the antenna terminals that are coupled to the receiver, or together with a parallel connected switch between one of the antenna terminals and a terminal of the transmitter. A damping control is configured to activate the at least one damping resistance during a damping period after the transmission burst period by controlling the respective switch.
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Patent Agency Ranking
公开(公告)号：US10242303B2
公开(公告)日：2019-03-26
申请号：US15473295
申请日：2017-03-29
Applicant: STMicroelectronics International N.V.
Inventor： Vinko Kunc , Iztok Bratuz , Albin Pevec , Kosta Kovacic , Maksimiljan Stiglic
IPC: G06K19/07 , G06K19/077 , H04L7/033
Abstract: In an embodiment, a carrier signal generation circuit can be used for a Radio-frequency identification (RFID) transponder device. A frequency divider circuit has a first input to receive a first frequency signal, a second input to receive a division ratio signal, and an output to provide a carrier signal as a function of the first frequency signal and the division ratio signal. A phase difference circuit has a first input to receive an analog reader device carrier signal, a second input to receive a signal based on the first frequency signal and an output to provide a digital phase difference signal as a function of the reader device carrier signal and the signal based on the first frequency signal. A signal processor has an input coupled to the output of the phase difference circuit.
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公开(公告)号：US09949108B2
公开(公告)日：2018-04-17
申请号：US15472907
申请日：2017-03-29
Applicant: STMicroelectronics International N.V.
Inventor： Nicolas Cordier , Vinko Kunc , Maksimiljan Stiglic
CPC classification number: H04W8/005 , H04B5/0025 , H04W4/80 , H04W48/10
Abstract: According to an embodiment, a method can be performed by a first active near-field communication (NFC) device. The method includes assuming a field detection mode, generating an advertisement pulse, and checking whether a predefined condition is fulfilled. If the checking determines that the predefined condition is fulfilled, the method includes assuming an active mode and communicating with an adjacent active NFC device, and, if the checking does not determine that the predefined condition is fulfilled, the method includes staying in the field detection mode and generating another advertisement pulse.
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18.发明申请公开(公告)号：US20170300723A1
公开(公告)日：2017-10-19
申请号：US15473074
申请日：2017-03-29
Applicant: STMicroelectronics International N.V
Inventor： Kosta Kovacic , Albin Pevec , Maksimiljan Stiglic
CPC classification number: G06K7/10009 , G06K19/0705 , G06K19/0723
Abstract: Embodiments provide a method for sending a message from an RFID transponder to a reader during a transmission frame using active load modulation, the method comprising. An encoded bit signal has a first logic level during first time segments within the transmission frame and a second logic level during second time segments within the transmission frame. The first time segments include an initial time segment of the transmission frame. A transmission signal is generated based on the encoded bit signal. The transmission signal is generated having a first phase depending on the first logic level during the first time segments, a second phase depending on the second logic level during the second time segments, and the second phase during a time interval preceding the transmission frame.
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公开(公告)号：US09760822B2
公开(公告)日：2017-09-12
申请号：US14761291
申请日：2014-01-14
Applicant: STMicroelectronics International N.V.
Inventor： Vinko Kunc , Maksimiljan Stiglic , Kosta Kovacic , Albin Pevec , Anton Stern
CPC classification number: H04B5/0056 , G06K7/10297 , G06K19/0701 , G06K19/0705 , G06K19/0723 , G06K19/0726 , H04B5/0075 , H04B5/0081
Abstract: An actively transmitting tag detects a shift of a phase of an antenna signal (as) with regard to a phase of a transmitted signal (ts) in time intervals with a length of one half-period of a subcarrier, in which time intervals it transmits high-frequency wave packets with their phase being inverted according to a communication protocol at the ends of said half-periods. Generation of said wave packets is controlled by said phase shift in a way that said phase shift retains its absolute value at transitions into subsequent half-periods. Synchronizing the tag's transmission to a received interrogator signal carried out even during tag's transmitting enables the tag to transmit according to protocol ISO 14443 B by inverting a phase at transitions between said half-periods. Said synchronizing is carried out although no time window without a tag transmitting exists within the transmitted data frame.
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公开(公告)号：US20170116509A1
公开(公告)日：2017-04-27
申请号：US15397559
申请日：2017-01-03
Applicant: STMicroelectronics International N.V.
Inventor： Vinko Kunc , Anton Stern , Kosta Kovacic , Albin Pevec , Maksimiljan Stiglic
IPC: G06K19/077 , G06K19/07
CPC classification number: G06K19/07773 , G06K19/0715 , G06K19/07749 , G06K19/0775
Abstract: An RFID transponder device has antenna terminals for coupling an antenna system to the device. A transmitter and a receiver are coupled to the antenna terminals. The device has at least one damping resistance connected to at least one of the antenna terminals. The at least one damping resistance is connected, depending on a voltage swing at the antenna terminals during a transmission burst period, either together with a serially connected switch in parallel to the antenna terminals that are coupled to the receiver, or together with a parallel connected switch between one of the antenna terminals and a terminal of the transmitter. A damping control is configured to activate the at least one damping resistance during a damping period after the transmission burst period by controlling the respective switch.
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