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    Compensating for Channel Distortion During Contactless Communication
    4.
    发明申请
    Compensating for Channel Distortion During Contactless Communication 审中-公开

    公开(公告)号：US20200336220A1

    公开(公告)日：2020-10-22

    申请号：US16921421

    申请日：2020-07-06

    Applicant: Apple Inc.

    Inventor： Xinping Zeng ,  Vusthla Sunil Reddy ,  Peter M. Agboh

    IPC: H04B15/00 ,  H03H21/00 ,  H04B17/309

    Abstract: Systems, methods, and devices are provided for compensating for distortion of a contactless communication channel. The electronic device may include a radio frequency system that itself includes antenna to transmit and receive data using near-field communication (NFC) and an NFC signal processing circuitry. The NFC signal processing circuitry may receive an NFC signal via a communication channel formed between the electronic device and another electronic device and may determine a baseband reference waveform associated with the electromagnetic NFC signal and may determine an error between a portion of the electromagnetic NFC signal and the baseband reference waveform. Furthermore, the NFC signal processing circuitry may determine whether the error is outside of an acceptable error threshold range and, in response to the error being outside of the acceptable error threshold range, train a filter response of the NFC signal processing circuitry to estimate the communication channel.

    High dynamic range NFC reader mode receiver
    5.
    发明授权
    High dynamic range NFC reader mode receiver 有权

    公开(公告)号：US10567041B2

    公开(公告)日：2020-02-18

    申请号：US15788688

    申请日：2017-10-19

    Applicant: Apple Inc.

    Inventor： Xinping Zeng ,  Peter M. Agboh ,  Vusthla Sunil Reddy

    IPC: H04B5/00 ,  H04L7/04

    Abstract: A transceiver that implements a high dynamic range NFC reader mode receiver may include a transmitter circuit to generate a transmit (TX) signal for communication to a first device via an antenna. The transceiver may further include a receiver circuit that is in communication with the first device via the antenna. The receiver circuit includes a mixer circuit and an adder circuit. The mixer circuit mixes a carrier signal with a first signal to generate a baseband signal. The adder circuit is coupled to the antenna and produces the first signal by adding a receive (RX) signal with a second signal to reduce a component of the TX signal included in the RX signal. The second signal is produced by processing a TX clock signal generated by the transmitter circuit.

    Band identifier system for wearable devices
    6.
    发明授权
    Band identifier system for wearable devices 有权

    公开(公告)号：US11611372B1

    公开(公告)日：2023-03-21

    申请号：US17200660

    申请日：2021-03-12

    Applicant: Apple Inc.

    Inventor： Daniel J. Hiemstra ,  Tengxing Wang ,  Erik G. De Jong ,  Zaki Moustafa ,  Xinping Zeng ,  Vincent Chauvin ,  Osamu Yabe

    IPC: H04B5/00 ,  A44C5/00 ,  G04G17/04 ,  H04W4/80

    Abstract: Wearable electronic devices, such as smart watches, can be provided with a band for securing the device to a wearer. The device and the band can include near-field communications (NFC) components that allow the device to uniquely identify the band. Device operations such as the color, theme, or content displayed on the device can be based, in part, on the identification of a particular band. The band may include a miniature NFC tag in an attachment portion of the band that is configured to be received in a recess in a housing of the device. An NFC module for reading the NFC tag can be provided within the recess of the housing, so that the attachment portion of the band and the recess in the device housing position and align the NFC tag with the NFC module when the band is attached to the device.

    Accessory device with communication features
    7.
    发明授权
    Accessory device with communication features 有权

    公开(公告)号：US11108424B2

    公开(公告)日：2021-08-31

    申请号：US16517383

    申请日：2019-07-19

    Applicant: Apple Inc.

    Inventor： Stephen T. Schooley ,  Ross D. Arriens ,  Sara Rusignuolo ,  Craig S. Ogden ,  Ho Cheung Chung ,  Vusthla Sunil Reddy ,  Jeremy D. Bataillou ,  Xinping Zeng

    IPC: H04B1/3827 ,  H04B1/3888 ,  H04M1/72412 ,  H04M1/72454 ,  H04W12/06

    Abstract: Accessory devices are described herein. An accessory device may include a receptacle for receiving an electronic device. The accessory device may include a case that covers the housing of the electronic device, or a folio that additionally includes a cover can conceal the display of the electronic device. Accessory devices described herein further include wireless circuitry used to communicate with wireless circuitry in the electronic device. The wireless circuitry can be used for various functions and features. For instance, the wireless circuitry in the accessory device can respond to authentication requests from the electronic device, and/or to send authentication requests to the electronic device. Further, the wireless circuitry in the accessory device can send information to the electronic device. Such information may include properties of the accessory device, or information stored on the accessory device that is presented on a display of the electronic device.

    Adaptive matching with antenna detuning detection
    8.
    发明授权
    Adaptive matching with antenna detuning detection 有权

    公开(公告)号：US10455392B2

    公开(公告)日：2019-10-22

    申请号：US15716712

    申请日：2017-09-27

    Applicant: Apple Inc.

    Inventor： Xinping Zeng ,  Peter M. Agboh ,  Vusthla Sunil Reddy

    IPC: H04B5/00 ,  H04B17/21 ,  H04W4/80 ,  H01Q1/52 ,  H01Q1/22 ,  H04B5/02

    Abstract: An electronic device includes a transmitter configured to generate a signal. The electronic device also includes tuning circuitry coupled to the transmitter, wherein the tuning circuitry comprises a variable capacitance element and at least one fixed capacitance element having a fixed capacitance, wherein the variable capacitance element is configured to provide a dynamic capacitance based upon a voltage value related to a determined phase difference between the signal and a second signal, wherein the tuning circuitry is configured to adjust a frequency of the first signal to generate a tuned signal based upon a total capacitance comprising the fixed capacitance and the dynamic capacitance. The electronic device further includes an antenna coupled to the tuning circuitry and configured to generate an electromagnetic field based on the tuned signal.

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