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公开(公告)号：US11068040B2
公开(公告)日：2021-07-20
申请号：US16406083
申请日：2019-05-08
申请人： NXP B.V.
IPC分类号： G06F1/32 , G06K19/07 , G06F1/3237 , G06F1/3206
摘要： In accordance with a first aspect of the present disclosure, a transponder is provided, comprising: digital logic for processing one or more portions of a data frame; a status detection unit configured to detect a status of a data frame reception or data frame transmission; a clock gating unit configured to apply clock gating to said digital logic in dependence on the status of said data frame reception or data frame transmission. In accordance with further aspects of the present disclosure, a corresponding method of operating a transponder is conceived, and a corresponding computer program is provided.
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公开(公告)号：US20190250267A1
公开(公告)日：2019-08-15
申请号：US16278006
申请日：2019-02-15
申请人： NXP B.V.
CPC分类号： G01S13/767 , G06F1/10 , G06K7/0008 , G06K19/0723 , H03K7/08 , H03L7/06
摘要： In accordance with a first aspect of the present disclosure, a transponder is provided, comprising: a frequency detector configured to monitor an output frequency of a clock-stop sensor of said transponder, wherein said frequency detector is further configured to determine if said output frequency falls within a response detection frequency range of an external reader, and a frequency shifter configured to shift, in response to the frequency detector determining that the output frequency falls within said response detection frequency range, said output frequency to a value outside said response detection frequency range. In accordance with a second aspect of the present disclosure, a corresponding method of operating a transponder is conceived. In accordance with a third aspect of the present disclosure, a corresponding computer program is provided.
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公开(公告)号：US20240113855A1
公开(公告)日：2024-04-04
申请号：US18149713
申请日：2023-01-04
申请人： NXP B.V.
CPC分类号： H04L7/0337 , G06K19/0723 , H04L7/0037
摘要： There is provided, a method for clock recovery in a RFID tag, the method includes receiving a RF field from a RFID reader. A field clock is generated from the received RF field, from which a clock recovery signal is generated. The RF field is modulated to produce a RF modulation. Generation of the clock recovery signal is paused while the RF field is being modulated. A modulation envelope signal is generated and used for load modulation. Generation of the clock recovery signal at the end of the RF modulation is resumed after a delay of one clock cycle from a falling edge of the modulation envelope signal. In another embodiment of the method, instead of adding the delay, a differential amplifier is used to increase RF field detection sensitivity. The method and the RFID tag ensures synchronized resumption of a PLL clock and the clock recovery signal.
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公开(公告)号：US11199621B2
公开(公告)日：2021-12-14
申请号：US16278006
申请日：2019-02-15
申请人： NXP B.V.
摘要： In accordance with a first aspect of the present disclosure, a transponder is provided, comprising: a frequency detector configured to monitor an output frequency of a clock-stop sensor of said transponder, wherein said frequency detector is further configured to determine if said output frequency falls within a response detection frequency range of an external reader, and a frequency shifter configured to shift, in response to the frequency detector determining that the output frequency falls within said response detection frequency range, said output frequency to a value outside said response detection frequency range. In accordance with a second aspect of the present disclosure, a corresponding method of operating a transponder is conceived. In accordance with a third aspect of the present disclosure, a corresponding computer program is provided.
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公开(公告)号：US12132816B2
公开(公告)日：2024-10-29
申请号：US18149713
申请日：2023-01-04
申请人： NXP B.V.
CPC分类号： H04L7/0337 , G06K19/0723 , H04L7/0037
摘要： There is provided, a method for clock recovery in a RFID tag, the method includes receiving a RF field from a RFID reader. A field clock is generated from the received RF field, from which a clock recovery signal is generated. The RF field is modulated to produce a RF modulation. Generation of the clock recovery signal is paused while the RF field is being modulated. A modulation envelope signal is generated and used for load modulation. Generation of the clock recovery signal at the end of the RF modulation is resumed after a delay of one clock cycle from a falling edge of the modulation envelope signal. In another embodiment of the method, instead of adding the delay, a differential amplifier is used to increase RF field detection sensitivity. The method and the RFID tag ensures synchronized resumption of a PLL clock and the clock recovery signal.
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公开(公告)号：US11295093B2
公开(公告)日：2022-04-05
申请号：US16847796
申请日：2020-04-14
申请人： NXP B.V.
摘要： In accordance with a first aspect of the present disclosure, a transponder is provided, comprising: a field strength range determination unit configured to determine a field strength range of a radio frequency (RF) field generated by an external reader device; a controller configured to delay processing of a command by the transponder in dependence on the field strength range determined by the field strength range determination unit. In accordance with further aspects of the present disclosure, a corresponding method of operating a transponder is conceived, and a corresponding computer program is provided.
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