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    Electronic device with frequency dithering
    2.
    发明授权
    Electronic device with frequency dithering 有权

    公开(公告)号：US11736032B1

    公开(公告)日：2023-08-22

    申请号：US18164291

    申请日：2023-02-03

    Applicant: Apple Inc.

    Inventor： Sujeet Milind Patole ,  Cheung-Wei Lam ,  Mahmoud N Mahmoud

    IPC: H02M7/48 ,  H02M1/12 ,  H02M7/529 ,  H02M1/00

    CPC classification number: H02M7/4803 ,  H02M1/0041 ,  H02M1/12 ,  H02M7/529

    Abstract: An electronic device may include an inverter. The inverter may convert direct current (DC) power to alternating current (AC) power. The inverter may use a clock signal at a given frequency to output corresponding alternating current signals at the given frequency. The inverter may receive a dithered clock signal that is frequency dithered using a modulating signal. The dithered clock signal may have at least three different frequency levels during a repeated cycle of the modulating signal. The at least three different frequency levels may include a fundamental frequency, a first frequency that is lower than the fundamental frequency, and a second frequency that is higher than the fundamental frequency. The dithered clock signal may be, during the repeated cycle of the modulating signal, at the fundamental frequency for fewer total periods than at the first frequency and for fewer total periods than at the second frequency.

    LOW-IMPEDANCE, LOW-HARMONIC SPRING CLIPS
    3.
    发明申请
    LOW-IMPEDANCE, LOW-HARMONIC SPRING CLIPS 有权

    公开(公告)号：US20210098921A1

    公开(公告)日：2021-04-01

    申请号：US17030932

    申请日：2020-09-24

    Applicant: Apple Inc.

    Inventor： Mahmoud N. Mahmoud ,  Cheung-Wei Lam ,  Vaneet Pathak ,  Ali Foudazi

    IPC: H01R13/24 ,  H01Q1/52 ,  H01R13/426 ,  H01R24/78

    Abstract: Spring clips that provide a reliable, low-impedance, low-harmonic path between various conductive enclosure components of electronic devices. These spring clips can include a low-impedance connection on each of two ends, where each end physically and electrically connects to an enclosure component of an electronic device. This can reduce an impedance between enclosure components and reduce the amplitude and harmonics of signals coupled onto them from a nearby antenna or other waveguide.

    ELECTRIC SHIELDING STRUCTURES
    4.
    发明申请
    ELECTRIC SHIELDING STRUCTURES 审中-公开

    公开(公告)号：US20190393733A1

    公开(公告)日：2019-12-26

    申请号：US16145503

    申请日：2018-09-28

    Applicant: Apple Inc.

    Inventor： Andro Radchenko ,  Vaneet Pathak ,  Martin Schauer ,  Cheung-Wei Lam ,  Rahul A. Sabnani

    IPC: H02J50/70 ,  H02J50/12 ,  H01F27/36 ,  H01F27/28

    Abstract: Wireless power transmitting devices according to embodiments of the present technology may include a contact surface configured to support one or more wireless power receiving devices. The wireless power transmitting devices may include a plurality of coils. The wireless power transmitting devices may also include a shield positioned between the plurality of coils and the contact surface. The shield may include one or more shield members, each shield member axially aligned with a separate coil of the plurality of coils, and may include a multilayer structure exhibiting various conductivities.

    MAGNETIC FIELD CONTAINMENT INDUCTORS
    6.
    发明申请
    MAGNETIC FIELD CONTAINMENT INDUCTORS 审中-公开

    公开(公告)号：US20180068784A1

    公开(公告)日：2018-03-08

    申请号：US15405027

    申请日：2017-01-12

    Applicant: Apple Inc.

    Inventor： Paul A. Martinez ,  Ming Y. Tsai ,  Federico P. Centola ,  Martin Schauer ,  Cheung-Wei Lam ,  Jason C. Sauers

    IPC: H01F27/36 ,  H05K1/18 ,  H05K1/02

    CPC classification number: H01F27/365 ,  H01F17/0013 ,  H01F2017/008 ,  H05K1/023 ,  H05K1/18

    Abstract: A system includes a circuit board, an inductor including windings mounted on the circuit board, and a plurality of magnetic field containment devices. Each magnetic field containment device includes an independent electrical circuit that is not directly electrically connected via a conductor to any other magnetic field containment device. Each magnetic field containment device also includes a material of a certain relative permeability. Each magnetic field containment device at least partially surrounds the inductor and, in operation, at least partially contains a magnetic B-Field generated by electrical current in the windings of the inductor. The plurality of magnetic field containment devices, in operation, enables a certain saturation current in the inductor.

    Electronic Device with Frequency Dithering
    8.
    发明公开
    Electronic Device with Frequency Dithering 审中-公开

    公开(公告)号：US20240072684A1

    公开(公告)日：2024-02-29

    申请号：US18341474

    申请日：2023-06-26

    Applicant: Apple Inc.

    Inventor： Sujeet Milind Patole ,  Cheung-Wei Lam ,  Mahmoud N. Mahmoud

    IPC: H02M7/48 ,  H02M1/00 ,  H02M1/12 ,  H02M7/529

    CPC classification number: H02M7/4803 ,  H02M1/0041 ,  H02M1/12 ,  H02M7/529

    Abstract: An electronic device may include an inverter. The inverter may convert direct current (DC) power to alternating current (AC) power. The inverter may use a clock signal at a given frequency to output corresponding alternating current signals at the given frequency. The inverter may receive a dithered clock signal that is frequency dithered using a modulating signal. The dithered clock signal may have at least three different frequency levels during a repeated cycle of the modulating signal. The at least three different frequency levels may include a fundamental frequency, a first frequency that is lower than the fundamental frequency, and a second frequency that is higher than the fundamental frequency. The dithered clock signal may be, during the repeated cycle of the modulating signal, at the fundamental frequency for fewer total periods than at the first frequency and for fewer total periods than at the second frequency.

    Wireless Power Systems With Interference Mitigation
    10.
    发明申请
    Wireless Power Systems With Interference Mitigation 有权

    公开(公告)号：US20230047448A1

    公开(公告)日：2023-02-16

    申请号：US17858228

    申请日：2022-07-06

    Applicant: Apple Inc.

    Inventor： Sujeet Milind Patole ,  Cheung-Wei Lam ,  Vaneet Pathak

    IPC: H04B15/02 ,  H02J50/10 ,  H02J50/80

    Abstract: A wireless power system has a wireless power transmitting device and a wireless power receiving device. A clock signal may be provided to inverter circuitry in wireless power transmitting circuitry at a power transmission frequency. The clock signal may cause transistors in the inverter circuitry to turn on and off to create AC current signals through the wireless power transmitting coil. The clock signal may be processed to mitigate electromagnetic interference in the system.

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