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    Bimodal Impedance Matching Terminators
    1.
    发明申请
    Bimodal Impedance Matching Terminators 审中-公开

    公开(公告)号：US20200089643A1

    公开(公告)日：2020-03-19

    申请号：US16134811

    申请日：2018-09-18

    Applicant: Apple Inc.

    Inventor： Hao Shi ,  Gary S. Thomason ,  Abhilash Rajagopal ,  Jason W. Leung ,  Koussalya Balasubramanian ,  Venus Kumar

    IPC: G06F13/40 ,  H01R13/646 ,  H04L25/02

    Abstract: A data network may include a data bus and network nodes. The data bus may be a differential data bus having first and second differential signal lines that convey differential signals between the nodes. A bimodal impedance terminator may be coupled to the first and second differential signal lines at one or both ends of the data bus. The bimodal impedance terminator may include a first resistor coupled between the first differential signal line and a circuit node and a second resistor coupled between the second differential signal line and the circuit node. A capacitor may be coupled between the circuit node and ground. A third resistor may be coupled between the circuit node and ground in series with the capacitor. The bimodal impedance terminator may terminate both the differential-mode impedance and the common-mode impedance of the data bus to reduce signal reflections at the ends of the data bus.

    Bimodal impedance matching terminators
    3.
    发明授权
    Bimodal impedance matching terminators 有权

    公开(公告)号：US10592458B1

    公开(公告)日：2020-03-17

    申请号：US16134811

    申请日：2018-09-18

    Applicant: Apple Inc.

    Inventor： Hao Shi ,  Gary S. Thomason ,  Abhilash Rajagopal ,  Jason W. Leung ,  Koussalya Balasubramanian ,  Venus Kumar

    IPC: H03K17/16 ,  H03K19/003 ,  G06F13/40 ,  H04L25/02 ,  H01R13/646

    Abstract: A data network may include a data bus and network nodes. The data bus may be a differential data bus having first and second differential signal lines that convey differential signals between the nodes. A bimodal impedance terminator may be coupled to the first and second differential signal lines at one or both ends of the data bus. The bimodal impedance terminator may include a first resistor coupled between the first differential signal line and a circuit node and a second resistor coupled between the second differential signal line and the circuit node. A capacitor may be coupled between the circuit node and ground. A third resistor may be coupled between the circuit node and ground in series with the capacitor. The bimodal impedance terminator may terminate both the differential-mode impedance and the common-mode impedance of the data bus to reduce signal reflections at the ends of the data bus.

    PRINTED CIRCUIT BOARD FEATURES OF A PORTABLE COMPUTER
    6.
    发明申请
    PRINTED CIRCUIT BOARD FEATURES OF A PORTABLE COMPUTER 有权
    便携式电脑的打印电路板功能

    公开(公告)号：US20140111926A1

    公开(公告)日：2014-04-24

    申请号：US13855681

    申请日：2013-04-02

    Applicant: APPLE INC.

    Inventor： Gavin J. Reid ,  Joss N. Giddings ,  William F. Leggett ,  Thomas R. Tate ,  Gary S. Thomason

    IPC: H05K1/02 ,  H05K3/00 ,  H05K3/30 ,  G06F1/16

    CPC classification number: G06F1/1662 ,  G06F1/16 ,  G06F1/1616 ,  G06F1/1656 ,  G06F1/203 ,  H01R13/50 ,  H01R13/6582 ,  H05K1/02 ,  H05K3/00 ,  H05K3/30 ,  Y10T29/49124 ,  Y10T29/4913

    Abstract: Methods, tools and fixtures for assembling a printed circuit board (PCB), such as a main logic board (MLB), in a portable computer device are described. A connector assembly having an electrically conductive gasket mounted on an edge of the MLB is described. In addition, a keyboard assembly including a notched portion of the MLB for accommodating more than one type of keyboard is described. In addition, a PCB assembly having a bracket to support a weak region of the PCB during assembly is described. In addition, a method for shielding an antenna cable situated on an MLB is described.

    Abstract translation: 描述了用于在便携式计算机设备中组装诸如主逻辑板（MLB）的印刷电路板（PCB）的方法，工具和固定装置。 描述了具有安装在MLB的边缘上的导电垫片的连接器组件。 此外，描述了包括用于容纳多于一种类型的键盘的MLB的切口部分的键盘组件。 此外，描述了一种具有用于在组装期间支撑PCB的弱区域的托架的PCB组件。 另外，描述了一种屏蔽位于MLB上的天线电缆的方法。

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