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    Switching of conductor pair in power over ethernet system
    2.
    发明授权
    Switching of conductor pair in power over ethernet system 有权

    公开(公告)号：US09660456B2

    公开(公告)日：2017-05-23

    申请号：US13657412

    申请日：2012-10-22

    Applicant: LINEAR TECHNOLOGY CORPORATION

    Inventor： David McLean Dwelley ,  Jeffrey Lynn Heath

    IPC: H02J4/00 ,  H04L12/10 ,  H04L12/40

    CPC classification number: H02J4/00 ,  H04L12/10 ,  H04L12/40045

    Abstract: Technique for providing power to a powered device (PD) over a cable having first and second sets of twisted pairs, such as signal pairs and spare pairs. Power Sourcing Equipment (PSE) circuitry is coupled via a first switch to the second set, e.g. to the spare pairs. A switch control circuit turns the first switch off to enable the PSE circuitry to perform a prescribed operation in connection with the PD over only the first set, e.g. over the signal pairs, and turns the first switch on to enable the PSE circuitry to perform the prescribed operation in connection with the PD over the first and second sets.

    ACCURATELY DETECTING LOW CURRENT THRESHOLD
    3.
    发明申请
    ACCURATELY DETECTING LOW CURRENT THRESHOLD 审中-公开
    精确检测低电流阈值

    公开(公告)号：US20160261255A1

    公开(公告)日：2016-09-08

    申请号：US15061715

    申请日：2016-03-04

    Applicant: LINEAR TECHNOLOGY CORPORATION

    Inventor： Andrew Joseph Gardner ,  David McLean Dwelley

    IPC: H03K5/153 ,  H03K5/24

    CPC classification number: H03K5/153 ,  G01R19/0092 ,  G01R19/16519 ,  G01R19/16538 ,  G01R19/16552 ,  G01R19/16571 ,  H03K5/24

    Abstract: A threshold detection circuit may sense when current between a power supply and a load reaches a current threshold level. The threshold detection circuit may include a transistor in series with the load; a feedback circuit that causes the voltage drop across the transistor to be constant while the transistor is conducting current between the power supply and the load; a constant current source that delivers a constant current into the load; and a comparator that indicates when the voltage drop across the transistor falls below a voltage threshold level.

    Abstract translation: 阈值检测电路可以感测电源和负载之间的电流达到当前阈值水平。 阈值检测电路可以包括与负载串联的晶体管; 当晶体管在电源和负载之间传导电流时，使得晶体管两端的电压降恒定的反馈电路; 恒定电流源，将恒定电流输送到负载中; 以及指示晶体管两端的电压降何时低于电压阈值电平的比较器。

    Switching topology for connecting two nodes in electronic system
    5.
    发明授权
    Switching topology for connecting two nodes in electronic system 有权
    用于连接电子系统中的两个节点的开关拓扑

    公开(公告)号：US08963617B1

    公开(公告)日：2015-02-24

    申请号：US14033110

    申请日：2013-09-20

    Applicant: Linear Technology Corporation

    Inventor： Kok Yong Sim ,  David McLean Dwelley

    IPC: H03K17/687 ,  H03K3/012 ,  H03K17/74

    CPC classification number: H03K3/012 ,  H03K17/687 ,  H03K17/74 ,  H03K19/0185 ,  H03K2217/0054

    Abstract: A circuit for providing connection between a first node at a first voltage and a second node at a second voltage. The circuit has a first inductive element having a first terminal coupled to the first node, a first switching element coupled between a second terminal of the first inductive element and the second node, a second inductive element having a first terminal configured for receiving current from the second terminal of the first inductive element, and having a second terminal coupled to a third node, and a second switching element coupled between the first terminal of the second inductive element and the second node. The first and second switching elements are configured for providing alternating current flow paths between the first node and the second node.

    Abstract translation: 一种用于在第一电压处的第一节点和第二电压之间提供第二节点之间的连接的电路。 电路具有第一电感元件，第一电感元件具有耦合到第一节点的第一端子，耦合在第一电感元件的第二端子和第二节点之间的第一开关元件，第二电感元件，第一电容元件，其被配置为从 并且具有耦合到第三节点的第二端子，以及耦合在第二电感元件的第一端子和第二节点之间的第二开关元件。 第一和第二开关元件被配置用于在第一节点和第二节点之间提供交流电流路径。

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