公开(公告)号：US10128913B2

公开(公告)日：2018-11-13

申请号：US15669380

申请日：2017-08-04

Applicant: STMicroelectronics International N.V.

Inventor： Vinko Kunc ,  Maksimiljan Stiglic ,  Kosta Kovacic ,  Albin Pevec ,  Anton Stern

IPC: H04Q5/22 ,  H04B5/00 ,  G06K19/07 ,  G06K7/10

Abstract: 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.

公开(公告)号：US10049237B2

公开(公告)日：2018-08-14

申请号：US15473074

申请日：2017-03-29

Applicant: STMicroelectronics International N.V

Inventor： Kosta Kovacic ,  Albin Pevec ,  Maksimiljan Stiglic

IPC: G06K7/10 ,  G06K19/07

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.

公开(公告)号：US20170338862A1

公开(公告)日：2017-11-23

申请号：US15669380

申请日：2017-08-04

Applicant: STMicroelectronics International N.V.

Inventor： Vinko Kunc ,  Maksimiljan Stiglic ,  Kosta Kovacic ,  Albin Pevec ,  Anton Stern

IPC: H04B5/00 ,  G06K19/07 ,  G06K7/10

CPC classification number: H04B5/0056 ,  G06K7/10297 ,  G06K19/0701 ,  G06K19/0705 ,  G06K19/0723 ,  G06K19/0726 ,  H04B5/0075 ,  H04B5/0081

Abstract: 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.

公开(公告)号：US10608705B2

公开(公告)日：2020-03-31

申请号：US16435815

申请日：2019-06-10

Applicant: STMicroelectronics International N.V.

Inventor： Kosta Kovacic ,  Albin Pevec ,  Maksimiljan Stiglic

IPC: H04B5/00 ,  G06K19/077 ,  G06K19/07 ,  G06K7/00

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.

公开(公告)号：US20190036568A1

公开(公告)日：2019-01-31

申请号：US15757771

申请日：2016-09-21

Applicant: STMicroelectronics International N.V.

Inventor： Kosta Kovacic ,  Albin Pevec

IPC: H04B5/00 ,  H04W4/80 ,  H04L27/04 ,  H04B1/04 ,  G06K7/10

CPC classification number: H04B5/0062 ,  G06K7/10366 ,  H04B1/04 ,  H04B5/0031 ,  H04L27/04 ,  H04W4/80

Abstract: When communicating using active load modulation in a Radio Frequency Identification (RFID) system, a carrier signal having a carrier frequency is received from a reader device. In response, a modulated signal is generated and a burst of a sending signal is transmitted. The sending signal is decayed at the end of the burst.

公开(公告)号：US20180343152A1

公开(公告)日：2018-11-29

申请号：US15580843

申请日：2016-06-09

Applicant: STMicroelectronics International N.V.

Inventor： Vinko Kunc ,  Albin Pevec ,  Kosta Kovacic

IPC: H04L27/06 ,  H03D1/18 ,  H03D1/22 ,  H03D1/02 ,  H04L27/26

Abstract: 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.

公开(公告)号：US20180227019A1

公开(公告)日：2018-08-09

申请号：US15742962

申请日：2016-07-15

Applicant: STMicroelectronics International N.V.

Inventor： Kosta Kovacic ,  Albin Pevec ,  Maksimiljan Stiglic

IPC: H04B5/00 ,  G06K19/07 ,  G06K19/077 ,  G06K7/00

CPC classification number: H04B5/0068 ,  G06K7/0008 ,  G06K19/0715 ,  G06K19/0723 ,  G06K19/07749

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.

公开(公告)号：US20180165569A1

公开(公告)日：2018-06-14

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: G06K19/077 ,  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.

公开(公告)号：US09928458B2

公开(公告)日：2018-03-27

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: G06K19/06 ,  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.

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.