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    Electronic circuit with electromagnetic interference detection and suppression and method therefor
    6.
    发明授权
    Electronic circuit with electromagnetic interference detection and suppression and method therefor 有权

    公开(公告)号：US11784578B2

    公开(公告)日：2023-10-10

    申请号：US17649215

    申请日：2022-01-28

    Applicant: NXP B.V.

    Inventor： Daniel Lopez-Diaz ,  Peter Thüringer ,  Pierluigi Cavallini ,  Hubert Watzinger

    IPC: H02M1/08 ,  H02M7/219 ,  G01R29/08 ,  H02M1/44 ,  H02M1/02

    CPC classification number: H02M7/219 ,  G01R29/08 ,  H02M1/02 ,  H02M1/08 ,  H02M1/44

    Abstract: An electronic circuit is provided. The electronic circuit includes a full-bridge rectifier, a spurious tone detection circuit, and a controller. The rectifier circuit has a plurality of switching elements and first and second radio frequency (RF) terminals. The spurious tone detection circuit has a non-linear circuit element and is coupled between the first RF terminal and a first reference terminal. The spurious tone detection circuit provides a non-zero direct current (DC) voltage in response to detecting harmonic tones at the first RF terminal of the full-bridge rectifier circuit. The controller is coupled to the plurality of switching elements. The controller is for controlling the operation of the plurality of switching elements based at least in part on detecting the harmonic tones. In one embodiment, the electronic circuit may be a wireless charging receiver. In another embodiment, a method for detecting harmonic tones in the electronic device is provided.

    Modulation control through adaptive phase adjustment
    7.
    发明授权
    Modulation control through adaptive phase adjustment 有权

    公开(公告)号：US09997829B2

    公开(公告)日：2018-06-12

    申请号：US15227614

    申请日：2016-08-03

    Applicant: NXP B.V.

    Inventor： Michael Gebhart ,  Fred George Nunziata ,  Hubert Watzinger

    IPC: H01Q3/30 ,  H01Q1/22

    CPC classification number: H01Q3/30 ,  H01Q1/2291 ,  H04B5/0031 ,  H04B5/0056

    Abstract: A Near Field Communication (NFC) enabled device is disclosed. The NFC device includes an antenna. The NFC device also includes an impedance matching network, a carrier frequency generator to generate a carrier wave, a receiver for receiving a magnetic induction wave, a transmitter, a driver circuit configured to alter an impedance of an antenna network associated with the antenna between a first impedance and a second impedance and a control unit. The control unit is configured to derive a first phase difference between the received magnetic induction wave and an internal clock at the first impedance and a second phase difference between the received magnetic induction wave and the internal clock at the second impedance. The control unit is further configured to change a phase of the carrier wave based on a difference between the first phase difference and a second phase difference.

    ELECTRONIC CIRCUIT WITH ELECTROMAGNETIC INTERFERENCE DETECTION AND SUPPRESSION AND METHOD THEREFOR
    9.
    发明公开
    ELECTRONIC CIRCUIT WITH ELECTROMAGNETIC INTERFERENCE DETECTION AND SUPPRESSION AND METHOD THEREFOR 审中-公开

    公开(公告)号：US20230246564A1

    公开(公告)日：2023-08-03

    申请号：US17649215

    申请日：2022-01-28

    Applicant: NXP B.V.

    Inventor： Daniel Lopez-Diaz ,  Peter Thüringer ,  Pierluigi Cavallini ,  Hubert Watzinger

    IPC: H02M7/219 ,  H02M1/08 ,  H02M1/12 ,  H02M1/44 ,  G01R29/08

    CPC classification number: H02M7/219 ,  H02M1/08 ,  H02M1/12 ,  H02M1/44 ,  G01R29/08

    Abstract: An electronic circuit is provided. The electronic circuit includes a full-bridge rectifier, a spurious tone detection circuit, and a controller. The rectifier circuit has a plurality of switching elements and first and second radio frequency (RF) terminals. The spurious tone detection circuit has a non-linear circuit element and is coupled between the first RF terminal and a first reference terminal. The spurious tone detection circuit provides a non-zero direct current (DC) voltage in response to detecting harmonic tones at the first RF terminal of the full-bridge rectifier circuit. The controller is coupled to the plurality of switching elements. The controller is for controlling the operation of the plurality of switching elements based at least in part on detecting the harmonic tones. In one embodiment, the electronic circuit may be a wireless charging receiver. In another embodiment, a method for detecting harmonic tones in the electronic device is provided.

    MODULATION CONTROL THROUGH ADAPTIVE PHASE ADJUSTMENT
    10.
    发明申请
    MODULATION CONTROL THROUGH ADAPTIVE PHASE ADJUSTMENT 有权

    公开(公告)号：US20180040953A1

    公开(公告)日：2018-02-08

    申请号：US15227614

    申请日：2016-08-03

    Applicant: NXP B.V.

    Inventor： Michael Gebhart ,  Fred George Nunziata ,  Hubert Watzinger

    IPC: H01Q3/30 ,  H01Q1/22

    CPC classification number: H01Q3/30 ,  H01Q1/2291 ,  H04B5/0031 ,  H04B5/0056

    Abstract: A Near Field Communication (NFC) enabled device is disclosed. The NFC device includes an antenna. The NFC device also includes an impedance matching network, a carrier frequency generator to generate a carrier wave, a receiver for receiving a magnetic induction wave, a transmitter, a driver circuit configured to alter an impedance of an antenna network associated with the antenna between a first impedance and a second impedance and a control unit. The control unit is configured to derive a first phase difference between the received magnetic induction wave and an internal clock at the first impedance and a second phase difference between the received magnetic induction wave and the internal clock at the second impedance. The control unit is further configured to change a phase of the carrier wave based on a difference between the first phase difference and a second phase difference.

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