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公开(公告)号：US10128913B2
公开(公告)日：2018-11-13
申请号：US15669380
申请日：2017-08-04
发明人： Vinko Kunc , Maksimiljan Stiglic , Kosta Kovacic , Albin Pevec , Anton Stern
摘要： A circuit of an actively transmitting tag includes an antenna, a digitizer, a voltage-controlled oscillator (VCO), an output amplifier, a phase-displacement detector, and a regulator. The input of the digitizer connects to the antenna. The outputs of the digitizer and the output amplifier are connected to the input terminals of the phase-displacement detector. The output amplifier connects the output of the VCO to the antenna and the regulator connects the output of the phase-displacement detector to the VCO.
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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
发明人： Vinko Kunc , Iztok Bratuz , Albin Pevec , Kosta Kovacic , Maksimiljan Stiglic
IPC分类号： G06K19/07 , G06K19/077
CPC分类号： G06K19/0724 , G06K19/0772 , G06K19/0775 , H04L7/033
摘要： 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：US20180343152A1
公开(公告)日：2018-11-29
申请号：US15580843
申请日：2016-06-09
发明人： Vinko Kunc , Albin Pevec , Kosta Kovacic
摘要： A demodulator circuit receives an envelope signal for comparison against a switched reference signal that is generated as a function of the envelope signal and as a function of an output signal of the demodulator circuit. The switched reference signal is filtered by an RC filter prior to comparison. The output signal is dependent on a difference between the filtered switched reference signal and the envelope signal.
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公开(公告)号：US20180165569A1
公开(公告)日：2018-06-14
申请号：US15894440
申请日：2018-02-12
发明人： Vinko Kunc , Anton Stern , Kosta Kovacic , Albin Pevec , Maksimiljan Stiglic
IPC分类号： G06K19/077 , G06K19/07
CPC分类号： G06K19/07773 , G06K19/0715 , G06K19/07749 , G06K19/0775
摘要： 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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公开(公告)号：US09946966B2
公开(公告)日：2018-04-17
申请号：US14426146
申请日：2013-09-04
发明人： Vinko Kunc , Maksimilijan Stiglic , Kosta Kovacic
CPC分类号： G06K19/0726 , H01Q1/2208
摘要： Tuning an antenna circuit of an actively transmitting tag to a frequency of an interrogator carrier signal after the tag was inserted into a host device is accomplished by detecting presence of the interrogator carrier signal at a location of the actively transmitting tag and hereafter setting capacitances of capacitors and/or inductances of coils comprised in said antenna circuit in a way that resonance of said antenna circuit is established while the antenna circuit is excited by a magnetic field of said interrogator carrier signal. This allows automatic tuning of an antenna circuit of an actively transmitting tag after it was inserted together with a miniature card into a host device, such as a mobile telephone, personal digital assistant, tablet PC and similar devices.
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公开(公告)号：US09928458B2
公开(公告)日：2018-03-27
申请号：US15397559
申请日：2017-01-03
发明人： Vinko Kunc , Anton Stern , Kosta Kovacic , Albin Pevec , Maksimiljan Stiglic
IPC分类号： G06K19/06 , G06K19/077 , G06K19/07
CPC分类号： G06K19/07773 , G06K19/0715 , G06K19/07749 , G06K19/0775
摘要： 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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公开(公告)号：US20180020338A1
公开(公告)日：2018-01-18
申请号：US15472907
申请日：2017-03-29
发明人： Nicolas Cordier , Vinko Kunc , Maksimiljan Stiglic
CPC分类号： H04W8/005 , H04B5/0025 , H04W4/80 , H04W48/10
摘要： 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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公开(公告)号：US10198680B2
公开(公告)日：2019-02-05
申请号：US15913003
申请日：2018-03-06
发明人： Vinko Kunc , Maksimiljan Stiglic , Kosta Kovacic
摘要： A circuit includes an antenna circuit including a number of capacitors and an inductor. The antenna circuit is configured to transmit an output signal upon receiving an input transmit signal. A first control block is configured to transmit an enabling signal upon detecting a presence of a supply voltage at a feeding terminal of the actively transmitting tag in response to the actively transmitting tag being inserted into a host device. A VCO is configured to generate the input transmit signal with the frequency of the interrogator carrier signal upon receiving the enabling signal from the first control block and upon receiving the control voltage from the memory. A second control block is configured to enable a subset of the plurality of capacitors of the antenna circuit upon receiving the enabling signal from the first control block.
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公开(公告)号：US20180197059A1
公开(公告)日：2018-07-12
申请号：US15913003
申请日：2018-03-06
发明人： Vinko Kunc , Maksimiljan Stiglic , Kosta Kovacic
CPC分类号： G06K19/0726 , H01Q1/2208
摘要： A circuit includes an antenna circuit including a number of capacitors and an inductor. The antenna circuit is configured to transmit an output signal upon receiving an input transmit signal. A first control block is configured to transmit an enabling signal upon detecting a presence of a supply voltage at a feeding terminal of the actively transmitting tag in response to the actively transmitting tag being inserted into a host device. A VCO is configured to generate the input transmit signal with the frequency of the interrogator carrier signal upon receiving the enabling signal from the first control block and upon receiving the control voltage from the memory. A second control block is configured to enable a subset of the plurality of capacitors of the antenna circuit upon receiving the enabling signal from the first control block.
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公开(公告)号：US20170338862A1
公开(公告)日：2017-11-23
申请号：US15669380
申请日：2017-08-04
发明人： Vinko Kunc , Maksimiljan Stiglic , Kosta Kovacic , Albin Pevec , Anton Stern
CPC分类号： H04B5/0056 , G06K7/10297 , G06K19/0701 , G06K19/0705 , G06K19/0723 , G06K19/0726 , H04B5/0075 , H04B5/0081
摘要： A circuit of an actively transmitting tag includes an antenna, a digitizer, a voltage-controlled oscillator (VCO), an output amplifier, a phase-displacement detector, and a regulator. The input of the digitizer connects to the antenna. The outputs of the digitizer and the output amplifier are connected to the input terminals of the phase-displacement detector. The output amplifier connects the output of the VCO to the antenna and the regulator connects the output of the phase-displacement detector to the VCO.
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