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    Dual sidestepping SWIF and method
    2.
    发明授权
    Dual sidestepping SWIF and method 失效
    双重回避SWIF和方法

    公开(公告)号：US3959748A

    公开(公告)日：1976-05-25

    申请号：US428584

    申请日：1973-12-26

    申请人： Sundaram Subramanian

    发明人： Sundaram Subramanian

    IPC分类号： H03H3/08 ,  H03H9/26 ,  H01L41/22 ,  H03H9/30 ,  H03H9/32

    CPC分类号： H03H3/08 ,  Y10T29/42

    摘要： A method of manufacturing an acoustic surface wave filter includes forming a first and second pair of transducers and a multistrip coupler upon the surface of a piezoelectric medium in a rectangular configuration with the transducers occupying its corners. Each transmitting transducer is diagonally oriented with its respective receiving transducer and the multistrip coupler is interposed between the transmitting and receiving transducers substantially orthogonal to the direction of surface wave propagation. Test signals are applied to each transducer pair to select the most favorable for use. The other pair is disabled. A SWIF manufactured in accordance with the method is disclosed having one pair of transducers disabled.

    摘要翻译： 制造声表面波滤波器的方法包括在传感器占据其角落的矩形构造中，在压电介质的表面上形成第一和第二对换能器以及多重耦合器。 每个发射换能器与其各自的接收换能器对角定向，并且多对耦合器介于基本上正交于表面波传播方向的发射和接收换能器之间。 测试信号被应用于每个换​​能器对以选择最有利的使用。 另一对被禁用。 公开了根据该方法制造的SWIF，其具有禁用的一对换能器。

    Time adjustment using time-to-live values
    3.
    发明授权
    Time adjustment using time-to-live values 有权
    使用生存时间值进行时间调整

    公开(公告)号：US08954609B1

    公开(公告)日：2015-02-10

    申请号：US13455817

    申请日：2012-04-25

    申请人： Keith E. Holleman ,  Murthy Garikiparthi ,  Meenakshi Sundaram Subramanian ,  DeviPrasad Natesan ,  Philip Kruzinski

    发明人： Keith E. Holleman ,  Murthy Garikiparthi ,  Meenakshi Sundaram Subramanian ,  DeviPrasad Natesan ,  Philip Kruzinski

    IPC分类号： G06F15/16

    CPC分类号： H04J3/0667 ,  H04L45/60 ,  H04L69/28

    摘要： In one example, network device includes a control unit having one or more hardware-based microprocessors and an interface. The interface can receive a first time synchronization message from a master device that comprises a first TTL value. The first TTL value can be indicative of a number of hops traversed by the first time synchronization message. The interface can subsequently receive a second time synchronization message from the master device that comprises a second TTL value that is is indicative of a number of hops traversed by the second time synchronization message. The network device can also include a timing module that determines a time adjustment based at least in part on the determination that the first and second TTL values are different, and applies the time adjustment to update the time of the network device.

    摘要翻译： 在一个示例中，网络设备包括具有一个或多个基于硬件的微处理器和接口的控制单元。 接口可以从包含第一TTL值的主设备接收第一次同步消息。 第一TTL值可以指示由第一时间同步消息遍历的跳数。 该接口随后可以从主设备接收包括指示由第二时间同步消息遍历的跳数的第二TTL值的第二时间同步消息。 网络设备还可以包括至少部分地基于第一和第二TTL值不同的确定来确定时间调整的定时模块，并且应用时间调整来更新网络设备的时间。

    Capacitively weighted surface acoustic wave device
    5.
    发明授权
    Capacitively weighted surface acoustic wave device 失效
    容积加权表面声波装置

    公开(公告)号：US4166257A

    公开(公告)日：1979-08-28

    申请号：US843474

    申请日：1977-10-19

    申请人： Sundaram Subramanian

    发明人： Sundaram Subramanian

    IPC分类号： H03H9/145 ,  H03H9/04 ,  H01L41/10 ,  H03H9/26 ,  H03H9/30

    CPC分类号： H03H9/14552 ,  H03H9/14523

    摘要： A surface acoustic wave device wherein the interdigitated fingers are capacitively weighted with decreasing capacitance from the center of the transducer to the ends thereof has an improved response in the frequency passband in that the dip therein is substantially diminished, if not eliminated, when the interdigitated fingers of the transducer are of the split-connected form except adjacent at the ends of the transducer where the interdigitated fingers are of the split-isolated form, or all of the interdigitated fingers are of the split-isolated form. The increased surface acoustic wave reflection occurring at the end fingers where the weighting capacitors are small is overcome by the decreased surface acoustic wave reflection resulting from the increased impedance of the split-isolated fingers.