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    EMC INDUCTOR-FREE RF FRONT-END METHOD AND TOPOLOGY WITH POWER BY FIELD FUNCTION FOR AN INDUCTIVELY COUPLED COMMUNICATION SYSTEM
    42.
    发明申请
    EMC INDUCTOR-FREE RF FRONT-END METHOD AND TOPOLOGY WITH POWER BY FIELD FUNCTION FOR AN INDUCTIVELY COUPLED COMMUNICATION SYSTEM 审中-公开

    公开(公告)号：US20200186199A1

    公开(公告)日：2020-06-11

    申请号：US16215173

    申请日：2018-12-10

    Applicant: NXP B.V.

    Inventor： Jingfeng Ding ,  Gernot Hueber ,  Erich Merlin

    IPC: H04B5/00

    Abstract: A near field communication (NFC) device capable of operating by being powered by the field includes an NFC module for generating an electromagnetic carrier signal and modulating the carrier signal according to data to be transmitted, and an antenna circuit coupled to and driven by said NFC module with the modulated carrier signal. The device includes an RF front end coupled between said NFC module and said antenna circuit. The RF front end includes a balanced to unbalanced (Balun) transformer and a tuning capacitor to provide a function of an electromagnetic compatibility (EMC) filter. A powered by the field circuit of the NFC device is adapted to harvest energy from an external field to power said NFC device. The power by the field circuit is coupled to said Balun transformer via one or more impedance elements.

    Device detection in contactless communication systems
    43.
    发明授权
    Device detection in contactless communication systems 有权

    公开(公告)号：US10511347B2

    公开(公告)日：2019-12-17

    申请号：US15812200

    申请日：2017-11-14

    Applicant: NXP B.V.

    Inventor： Gernot Hueber ,  Ian Thomas Macnamara

    IPC: H04B5/00 ,  G06K7/10

    Abstract: A near field communication (NFC) reader is disclosed. The NFC reader includes an antenna front-end that includes a low pass filter, a matching circuit and an antenna coil. The NFC reader also includes a NFC controller. The NFC controller includes an oscillator coupled to the antenna front-end and the NFC controller is configured to detect a presence of an object in proximity of the antenna front-end using one or more changes in an output of the oscillator. The antenna front-end creates a tank circuit for the oscillator.

    Method and system for a subsampling based system integrated scope to enhance sample rate and resolution
    44.
    发明授权
    Method and system for a subsampling based system integrated scope to enhance sample rate and resolution 有权

    公开(公告)号：US10396912B1

    公开(公告)日：2019-08-27

    申请号：US16120210

    申请日：2018-08-31

    Applicant: NXP B.V.

    Inventor： Gernot Hueber ,  Ian Thomas Macnamara

    IPC: H04B17/29 ,  H04B1/30

    Abstract: This specification discloses methods and systems for implementing a chip integrated scope (i.e., chip scope (CS)), which is a feature that allows a user to scope RF signals (internally and externally to the DUT (device under test)), by using the RF receive path (including amplifier, filter, ADC, DSP) to capture and store signal traces. In some embodiments, this specification discloses methods and systems to enhance the sampling rate and resolution of these signal traces by using subsampling techniques where a post-processing merges the subsampled traces (with different phase-shifts of say, for example, 0°, 90°, 180°, and 270°) into a single trace that will appear to have a sampling rate that is higher than a pre-determined sampling rate used to collect these subsampled traces.

    Contactless communication device with differential receiver input voltage stabilization
    46.
    发明授权
    Contactless communication device with differential receiver input voltage stabilization 有权

    公开(公告)号：US10291291B2

    公开(公告)日：2019-05-14

    申请号：US15646955

    申请日：2017-07-11

    Applicant: NXP B.V.

    Inventor： Jingfeng Ding ,  Gernot Hueber ,  Stefan Mendel

    IPC: G05F3/02 ,  H03G1/00 ,  H03L7/08 ,  H04B5/00 ,  H04L25/02 ,  H04W88/02

    Abstract: A contactless communication device includes a receiver unit having differential input terminals for connecting to an antenna. The receiver unit is coupled to a transmitting device and receives an RF signal transmitted by the transmitting device. A first comparator is adapted to generate a first comparator output signal indicative of a relationship between a voltage at a positive input terminal of the receiver unit and a first reference voltage. A second comparator is adapted to generate a second comparator output signal indicative of a relationship between a voltage at a negative input terminal of the receiver unit and a second reference voltage. A first voltage regulation circuit is adapted to regulate the voltage at the positive input terminal in response to the first comparator output signal. A second voltage regulation circuit is adapted to regulate the voltage at the negative input terminal in response to the second comparator output signal.

    RF front end module and near field communication device
    48.
    发明授权
    RF front end module and near field communication device 有权

    公开(公告)号：US10200091B2

    公开(公告)日：2019-02-05

    申请号：US15621286

    申请日：2017-06-13

    Applicant: NXP B.V.

    Inventor： Jingfeng Ding ,  Gernot Hueber ,  Ian Thomas Macnamara

    IPC: H04B5/00 ,  H04W88/06

    Abstract: A device for inductively coupled communications includes an NFC module for generating an electromagnetic carrier signal and modulating the carrier signal according to data to be transmitted, and an antenna circuit coupled to and driven by said NFC module with the modulated carrier signal. The device includes an RF front end coupled between said NFC module and said antenna circuit. The RF front end includes a balanced to unbalanced (Balun) transformer and a tuning capacitor. The Balun transformer has a first winding coupled to said NFC module via differential transmitter terminals of said NFC module and a second winding coupled to said tuning capacitor. A first terminal of said tuning capacitor is coupled to a receiving terminal of said NFC module. The Balun transformer and tuning capacitor provide a function of an electromagnetic compatibility (EMC) filter.

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