公开(公告)号：US20230064494A1

公开(公告)日：2023-03-02

申请号：US17445752

申请日：2021-08-24

Applicant: NXP B.V.

Inventor： Thomas Pichler ,  Ivan Jesus Rebollo Pimentel

IPC: G06K19/07 ,  H03K17/693

Abstract: A voltage limiter incorporated in a radio frequency identification (RFID) integrated circuit (IC) for a RFID tag is disclosed. The RFID IC includes a radio frequency (RF) rectifier and a clock generator. The RF rectifier is configured to convert an AC signal received from an antenna incorporated in the RFID tag to a DC signal. The voltage limiter includes a current sink device coupled between output of the RF rectifier and ground and a charge pump to control conduction of current through the current sink device to limit output voltage of the RF rectifier to a predefined voltage level.

公开(公告)号：US11556751B2

公开(公告)日：2023-01-17

申请号：US17303487

申请日：2021-05-29

Applicant: NXP B.V.

Inventor： Thomas Pichler ,  Ivan Jesus Rebollo Pimentel

IPC: G06K19/07 ,  G06K19/073

Abstract: A Radio Frequency Identification (RFID) tag is disclosed. The RFID tag includes an antenna port to receive an input AC signal and a hybrid limiter including a clamping device configured to limit a voltage of the input AC signal to a preconfigured limit. The hybrid limiter is configured to provide a stable ground reference for the clamping device.

公开(公告)号：US20220414357A1

公开(公告)日：2022-12-29

申请号：US17806547

申请日：2022-06-13

Applicant: NXP B.V.

Inventor： Egas Carvalho Henes Neto ,  Slawomir Rafal Malinowski ,  Ivan Jesus Rebollo Pimentel ,  Thomas Pichler

IPC: G06K7/10 ,  G06K19/07

Abstract: It is described an RF communication device comprising: i) an RF antenna functionality; ii) at least one antenna pad connected to the RF antenna functionality; iii) a further functionality which is not an RF antenna functionality; and iv) at least one non-antenna pad electrically connected to the further functionality. The antenna pad and the non-antenna pad are arranged to be short-circuited with each other, and the non-antenna pad is electrically connected via a connection line to the further functionality within the RF communication device.
Further, a method of manufacturing an RF communication device is described.

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.

公开(公告)号：US20210248331A1

公开(公告)日：2021-08-12

申请号：US16786109

申请日：2020-02-10

Applicant: NXP B.V.

Inventor： Maurits Mario Nicolaas Storms ,  Thomas Pichler ,  Ivan Jesus Rebollo Pimentel

IPC: G06K7/10 ,  G06K19/07

Abstract: A radio frequency identification (RFID) transponder includes a current control module for controlling a current consumption of a memory based on an amount of available power, and a control logic for controlling a memory operation in response to the control of the current consumption by the current control module. The RFID transponder further includes a power detector that is configured to continuously monitor and detect the amount of available power and output a power-dependent control signal. The power-dependent control signal is used by the RFID transponder to control the current consumption of the memory in dependence on the available power.

公开(公告)号：US11023797B2

公开(公告)日：2021-06-01

申请号：US16872952

申请日：2020-05-12

Applicant: NXP B.V.

Inventor： Thomas Pichler ,  Christian Weidinger ,  Ivan Jesus Rebollo Pimentel

IPC: G06K19/07

Abstract: In accordance with a first aspect of the present disclosure, a radio frequency identification (RFID) transponder is provided, comprising a modulator and a modulator controller, wherein the modulator is configured to generate a modulated signal to be transmitted to an external RFID reader, and wherein the modulator controller is configured to control a duty cycle of the modulator in dependence on an available amount of power. In accordance with a second aspect of the present disclosure, a method of operating a radio frequency identification (RFID) transponder is conceived, comprising: generating, by a modulator of the RFID transponder, a modulated signal to be transmitted to an external RFID reader; controlling, by a modulator controller of the RFID transponder, a duty cycle of the modulator in dependence on an available amount of power.

公开(公告)号：US20210133526A1

公开(公告)日：2021-05-06

申请号：US17065582

申请日：2020-10-08

Applicant: NXP B.V.

Inventor： Thomas Pichler ,  Ivan Jesus Rebollo Pimentel ,  Stefan Maier ,  Egas Carvalho Henes Neto ,  Harcharan Singh Madaan ,  Slawomir Rafal Malinowski

IPC: G06K19/07

Abstract: In accordance with a first aspect of the present disclosure, a radio frequency identification (RFID) transponder is provided, comprising a modulator and a controller, wherein: the modulator is configured to generate a modulated signal to be transmitted to an external RFID reader; the controller is configured to regulate an input voltage for the modulator, resulting in a regulated input voltage, and to feed said regulated input voltage to the modulator. In accordance with a second aspect of the present disclosure, a corresponding method of operating a radio frequency identification (RFID) transponder is provided.

公开(公告)号：US11886216B2

公开(公告)日：2024-01-30

申请号：US17453218

申请日：2021-11-02

Applicant: NXP B.V.

Inventor： Ivan Jesus Rebollo Pimentel ,  Thomas Pichler ,  Ronald van Langevelde

IPC: G05F1/575 ,  G06K19/07 ,  H02H9/04

CPC classification number: G05F1/575 ,  G06K19/0715 ,  H02H9/04

Abstract: A voltage regulator is provided. The voltage regulator includes a shunt transistor and a feedback circuit. The shunt transistor has a first current electrode coupled to a first voltage source terminal, a second current electrode coupled to a second voltage source terminal, a control electrode coupled to receive a reference voltage, and a body electrode. The feedback circuit has an input terminal coupled to the body electrode of the shunt transistor, and an output terminal coupled to the control electrode of the shunt transistor. The voltage regulator is suitable for use in a passive RFID device to protect the device from over-voltage damage. In another embodiment, a method for regulating a voltage is provided.

公开(公告)号：US11875214B2

公开(公告)日：2024-01-16

申请号：US17305071

申请日：2021-06-30

Applicant: NXP B.V.

Inventor： Thomas Pichler ,  Ivan Jesus Rebollo Pimentel

IPC: G06K7/10 ,  G06K19/07

CPC classification number: G06K7/10198 ,  G06K7/10297 ,  G06K7/10346 ,  G06K19/0723

Abstract: In accordance with a first aspect of the present disclosure, a radio frequency identification (RFID) transponder is provided, comprising: a receiver configured to receive a command from an external RFID reader, wherein the command is a first command transmitted by the RFID reader during a communication session and wherein said command comprises a at least one parameter indicative of one or more modifiable settings of the RFID transponder; and a controller configured to modify the settings of the RFID transponder in accordance with a value of said parameter. In accordance with a second aspect of the present disclosure, a corresponding method of operating a radio frequency identification (RFID) transponder is conceived.

公开(公告)号：US11593603B2

公开(公告)日：2023-02-28

申请号：US17451886

申请日：2021-10-22

Applicant: NXP B.V.

Inventor： Thomas Pichler ,  Ivan Jesus Rebollo Pimentel

IPC: G06K19/07 ,  H02M3/07 ,  G06K19/077

Abstract: There is described a rectifier circuit for providing and limiting a supply voltage to an RFID tag, the circuit including a pair of antenna input terminals configured to receive an input signal from an RFID tag antenna. A plurality of charge pump stages are coupled in cascade in such a way that an input terminal of a first charge pump stage in the cascade is connected to ground and an input terminal of each subsequent charge pump stage in the cascade is coupled to an output terminal of the preceding charge pump stage in the cascade. A control logic is configured to select the output terminal of one charge pump stage among the plurality of charge pump stages to provide the supply voltage. Furthermore, an RFID tag and a method of providing and limiting a supply voltage to an RFID tag are described.