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公开(公告)号：US11481591B1
公开(公告)日：2022-10-25
申请号：US16925576
申请日：2020-07-10
Applicant: Impinj, Inc.
Inventor： Charles J. T. Peach , John D. Hyde , Jay A. Kuhn , Theron Stanford , Amita Patil
IPC: G06K19/07 , H03K17/687
Abstract: Embodiments are directed to rectifiers using a single bias current or bias current path to bias multiple rectifying elements. A rectifier that has multiple rectifier stages coupled together serially includes a bias current path coupled to each of the rectifier stages. The bias current path is configured to simultaneously bias rectifying elements in each of the rectifier stages by using a bias current to bias a first rectifying element and reusing the bias current to bias other rectifying elements.
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公开(公告)号：US11188803B1
公开(公告)日：2021-11-30
申请号：US16810892
申请日：2020-03-06
Applicant: Impinj, Inc.
Inventor： Amita Patil , Jay A. Kuhn , Charles J. T. Peach , John D. Hyde , Jaskarn Johal
Abstract: Backflow in rectifiers may be reduced via biasing. Upon determining that backflow within a rectifier is likely, one or more rectifying elements in the rectifier may be debiased, via analog or digital means. The debiased rectifying elements become less conductive or nonconductive, thereby reducing or preventing backflow. The determination of backflow likelihood may be performed based on a signal to be backscattered or the amplitude-modulated envelope of an incident RF wave, and may be digital or analog in nature.
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公开(公告)号：US11341837B1
公开(公告)日：2022-05-24
申请号：US17134729
申请日：2020-12-28
Applicant: Impinj, Inc.
Inventor： Christopher J. Diorio , Harley Heinrich , Matthew Robshaw , Theron Stanford , Charles J. T. Peach , John D. Hyde , Tan Mau Wu
Abstract: RFID ICs sense and indicate changes in their surrounding environment, such as changes in temperature, humidity, chemical presence, RF signals, and similar. An RFID IC indicates when a significant environmental change has occurred, for example by adjusting the value of a flag, writing data to memory, transmitting a message to an external entity, exiting a sleep state, and/or responding repeatedly to an inventorying reader. In some cases, RFID IC actively notifies an external entity that a significant environmental change has been sensed. For example, RFID IC may alert the external entity by participating in a special inventory process meant for RFID ICs sending environmental change. The RFID IC may alert the external entity by interjecting itself into an inventory round, re-participating in an inventory round, refraining from entering a sleep state after inventorying, and/or adjusting timing of a scheduled reply to communicate with an RFID reader ahead of schedule.
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公开(公告)号：US10885417B1
公开(公告)日：2021-01-05
申请号：US16797801
申请日：2020-02-21
Applicant: Impinj, Inc.
Inventor： Theron Stanford , Charles J. T. Peach , Jay A. Kuhn , Harley K. Heinrich , John D. Hyde , Christopher J. Diorio , Alberto Pesavento
IPC: G06K19/07
Abstract: Embodiments are directed to mitigating power-based impedance changes in Radio Frequency Identification (RFID) tags. The intrinsic impedance of components in an RFID tag front-end may change as incident RF power on the tag changes, causing the input impedance of the front-end to change and altering the RF properties of the RFID tag. A number of approaches can be used to mitigate input impedance variations due to power variations. One approach involves adjusting the operating point of one or more components in the RFID tag front-end to change their intrinsic impedances so as to counteract or mitigate the RF-power-based input impedance variation.
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公开(公告)号：US12204970B1
公开(公告)日：2025-01-21
申请号：US17970794
申请日：2022-10-21
Applicant: Impinj, Inc.
Inventor： Charles J. T. Peach , John D. Hyde , Jay A. Kuhn , Theron Stanford , Amita Patil
IPC: G06K19/07 , H03K17/687
Abstract: Embodiments are directed to rectifiers using a single bias current or bias current path to bias multiple rectifying elements. A rectifier that has multiple rectifier stages coupled together serially includes a bias current path coupled to each of the rectifier stages. Thee bias current path is configured to simultaneously bias rectifying elements in each of the rectifier stages by using a bias current to bias a first rectifying element and reusing the bias current to bias other rectifying elements.
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Patent Agency Ranking
公开(公告)号：US11798392B1
公开(公告)日：2023-10-24
申请号：US17749292
申请日：2022-05-20
Applicant: Impinj, Inc.
Inventor： Christopher J. Diorio , Harley Heinrich , Matthew Robshaw , Theron Stanford , Charles J. T. Peach , John D. Hyde , Tan Mau Wu
CPC classification number: G08B21/182 , G06K7/10366 , G06K19/0723
Abstract: RFID ICs sense and indicate changes in their surrounding environment, such as changes in temperature, humidity, chemical presence, RF signals, and similar. An RFID IC indicates when a significant environmental change has occurred, for example by adjusting the value of a flag, writing data to memory, transmitting a message to an external entity, exiting a sleep state, and/or responding repeatedly to an inventorying reader. In some cases, RFID IC actively notifies an external entity that a significant environmental change has been sensed. For example, RFID IC may alert the external entity by participating in a special inventory process meant for RFID ICs sending environmental change. The RFID IC may alert the external entity by interjecting itself into an inventory round, re-participating in an inventory round, refraining from entering a sleep state after inventorying, and/or adjusting timing of a scheduled reply to communicate with an RFID reader ahead of schedule.
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公开(公告)号：US10713549B1
公开(公告)日：2020-07-14
申请号：US15985291
申请日：2018-05-21
Applicant: Impinj, Inc.
Inventor： Charles J. T. Peach , John D. Hyde , Jay A. Kuhn , Theron Stanford , Amita Patil
IPC: G06K19/07 , H03K17/687
Abstract: Embodiments are directed to rectifiers using a single bias current or bias current path to bias multiple rectifying elements. A rectifier that has multiple rectifier stages coupled together serially includes a bias current path coupled to each of the rectifier stages. Thee bias current path is configured to simultaneously bias rectifying elements in each of the rectifier stages by using a bias current to bias a first rectifying element and reusing the bias current to bias other rectifying elements.
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公开(公告)号：US10572789B1
公开(公告)日：2020-02-25
申请号：US15888916
申请日：2018-02-05
Applicant: Impinj, Inc.
Inventor： Theron Stanford , Charles J. T. Peach , Jay A. Kuhn , Harley K. Heinrich , John D. Hyde , Christopher J. Diorio , Alberto Pesavento
IPC: G06K19/07
Abstract: Embodiments are directed to mitigating power-based impedance changes in Radio Frequency Identification (RFID) tags. The intrinsic impedance of components in an RFID tag front-end may change as incident RF power on the tag changes, causing the input impedance of the front-end to change and altering the RF properties of the RFID tag. A number of approaches can be used to mitigate input impedance variations due to power variations. One approach involves adjusting the operating point of one or more components in the RFID tag front-end to change their intrinsic impedances so as to counteract or mitigate the RF-power-based input impedance variation.
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公开(公告)号：US12125364B1
公开(公告)日：2024-10-22
申请号：US18490786
申请日：2023-10-20
Applicant: Impinj, Inc.
Inventor： Christopher J. Diorio , Harley Heinrich , Matthew Robshaw , Theron Stanford , Charles J. T. Peach , John D. Hyde , Tan Mau Wu
CPC classification number: G08B21/182 , G06K7/10366 , G06K19/0723
Abstract: RFID ICs sense and indicate changes in their surrounding environment, such as changes in temperature, humidity, chemical presence, RF signals, and similar. An RFID IC indicates when a significant environmental change has occurred, for example by adjusting the value of a flag, writing data to memory, transmitting a message to an external entity, exiting a sleep state, and/or responding repeatedly to an inventorying reader. In some cases, RFID IC actively notifies an external entity that a significant environmental change has been sensed. For example, RFID IC may alert the external entity by participating in a special inventory process meant for RFID ICs sending environmental change. The RFID IC may alert the external entity by interjecting itself into an inventory round, re-participating in an inventory round, refraining from entering a sleep state after inventorying, and/or adjusting timing of a scheduled reply to communicate with an RFID reader ahead of schedule.
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公开(公告)号：US11734540B1
公开(公告)日：2023-08-22
申请号：US17534576
申请日：2021-11-24
Applicant: Impinj, Inc.
Inventor： Amita Patil , Jay A. Kuhn , Charles J. T. Peach , John D. Hyde , Jaskarn Johal
CPC classification number: G06K19/0723 , G06K19/0715
Abstract: Backflow in rectifiers may be reduced via biasing. Upon determining that backflow within a rectifier is likely, one or more rectifying elements in the rectifier may be debiased, via analog or digital means. The debiased rectifying elements become less conductive or nonconductive, thereby reducing or preventing backflow. The determination of backflow likelihood may be performed based on a signal to be backscattered or the amplitude-modulated envelope of an incident RF wave, and may be digital or analog in nature.
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