公开(公告)号：US20220198237A1

公开(公告)日：2022-06-23

申请号：US17247650

申请日：2020-12-18

Applicant: NXP B.V.

Inventor： Thomas Pichler ,  Ivan Jesus Rebollo Pimentel ,  Christian Weidinger ,  Franz Amtmann ,  Werner Zettler ,  Heinz Umfahrer

IPC: G06K19/077 ,  G06K7/10

Abstract: A Radio Frequency Identification (RFID) tag is disclosed. The RFID tag includes an antenna to receive an input AC signal and a tuning system coupled with the antenna to optimize signal strength of the input AC signal. The tuning system includes a charge pump rectifier. A diode rectifier is included and is coupled with the antenna to receive the input AC signal after the tuning system optimizes the signal strength by tuning input impedance of the antenna.

公开(公告)号：US20230062060A1

公开(公告)日：2023-03-02

申请号：US17817905

申请日：2022-08-05

Applicant: NXP B.V.

Inventor： Christian Weidinger ,  Heinz Umfahrer

IPC: H04L27/06 ,  H04W4/80

Abstract: There is described an RFID IC, comprising:
i) an RFID interface configured to receive a digitally modulated signal, wherein the digitally modulated signal comprises: a first slot with a first pulse, and a second slot with a second pulse; and ii) a processing unit configured to a) determine a first position of the first pulse in the first slot, b) filter a region that follows the determined first position of the first pulse, c) determine a second position of the second pulse in the second slot, and, if the second position of the second pulse cannot be determined in the second slot, assume that the second position of the second pulse in the second slot is at the filtered region.

公开(公告)号：US11481595B2

公开(公告)日：2022-10-25

申请号：US17247650

申请日：2020-12-18

Applicant: NXP B.V.

Inventor： Thomas Pichler ,  Ivan Jesus Rebollo Pimentel ,  Christian Weidinger ,  Franz Amtmann ,  Werner Zettler ,  Heinz Umfahrer

IPC: G06K19/077 ,  G06K7/10

Abstract: A Radio Frequency Identification (RFID) tag is disclosed. The RFID tag includes an antenna to receive an input AC signal and a tuning system coupled with the antenna to optimize signal strength of the input AC signal. The tuning system includes a charge pump rectifier. A diode rectifier is included and is coupled with the antenna to receive the input AC signal after the tuning system optimizes the signal strength by tuning input impedance of the antenna.

公开(公告)号：US12141636B2

公开(公告)日：2024-11-12

申请号：US17655113

申请日：2022-03-16

Applicant: NXP B.V.

Inventor： Christian Schwar ,  Christian Weidinger ,  Franz Amtmann ,  Heinz Umfahrer ,  Christoph Hans Joachim Garbe ,  Thomas Pichler

IPC: G06K19/077 ,  G06K7/10 ,  G06Q10/087 ,  H04W4/80

Abstract: There is described an RFID tag IC, comprising: i) an NFC interface configured to initiate a power-up, when coupled with an HF field, and receive a read command from an RFID device; ii) a non-volatile memory, wherein the non-volatile memory is configured to store a counter value; and iii) a processing unit configured to increment the counter value when coupled with the HF field, set an increment flag, when the increment is successful, and thereby block a further increment of the counter value, in particular when fulfilling the read command, and reset the increment flag after fulfilling the read command. Further, a communication system and a method of operating are described.

公开(公告)号：US11888659B2

公开(公告)日：2024-01-30

申请号：US17817905

申请日：2022-08-05

Applicant: NXP B.V.

Inventor： Christian Weidinger ,  Heinz Umfahrer

IPC: H04L27/06 ,  H04W4/80

CPC classification number: H04L27/06 ,  H04W4/80

Abstract: There is described an RFID IC, comprising:
i) an RFID interface configured to receive a digitally modulated signal, wherein the digitally modulated signal comprises: a first slot with a first pulse, and a second slot with a second pulse; and
ii) a processing unit configured to
a) determine a first position of the first pulse in the first slot,
b) filter a region that follows the determined first position of the first pulse,
c) determine a second position of the second pulse in the second slot, and, if the second position of the second pulse cannot be determined in the second slot, assume that the second position of the second pulse in the second slot is at the filtered region.

公开(公告)号：US20220327341A1

公开(公告)日：2022-10-13

申请号：US17655113

申请日：2022-03-16

Applicant: NXP B.V.

Inventor： Christian Schwar ,  Christian Weidinger ,  Franz Amtmann ,  Heinz Umfahrer ,  Christoph Hans Joachim Garbe ,  Thomas Pichler

IPC: G06K19/077 ,  G06K7/10 ,  H04W4/80

Abstract: There is described an RFID tag IC, comprising: i) an NFC interface configured to initiate a power-up, when coupled with an HF field, and receive a read command from an RFID device; ii) a non-volatile memory, wherein the non-volatile memory is configured to store a counter value; and iii) a processing unit configured to increment the counter value when coupled with the HF field, set an increment flag, when the increment is successful, and thereby block a further increment of the counter value, in particular when fulfilling the read command, and reset the increment flag after fulfilling the read command. Further, a communication system and a method of operating are described.