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57 条记录 (耗时 0.037 秒)

    Hybrid single sideband optical modulator
    1.
    发明授权
    Hybrid single sideband optical modulator 失效
    混合单边带光调制器

    公开(公告)号：US5999300A

    公开(公告)日：1999-12-07

    申请号：US873967

    申请日：1997-06-12

    申请人： Robert J. Davies ,  Jan Conradi ,  David E. Dodds

    发明人： Robert J. Davies ,  Jan Conradi ,  David E. Dodds

    IPC分类号： H04B10/516 ,  G02F1/035 ,  H03C5/00 ,  H04B1/68 ,  H04L27/04 ,  H04B10/04

    CPC分类号： H04B10/5165

    摘要： Bandwidth reduction methods and apparatus that offset the effects of dispersion on a signal transmitted through an optical fiber. The apparatus and methods employ a generator of modulated optical signals in cascade with a modulator. One of the generator and the modulator may be an optical intensity or amplitude modulator and the other a phase (or frequency) modulator. With the application of specific signals, the cascaded generator and modulator produce an optical signal with reduced energy in one half of the transmission bandwidth. One important benefit in the method is the fact that by exploiting the less obvious spectral characteristics of single sideband signals, a simple modulator design is achieved. All of the designs exploit a method of generating analytic signals via hybrid modulation.

    摘要翻译： 抵消色散对通过光纤传输的信号的影响的带宽减小方法和装置。 该装置和方法采用与调制器级联的调制光信号的发生器。 发生器和调制器之一可以是光强度或幅度调制器，另一个是相位（或频率）调制器。 随着特定信号的应用，级联发生器和调制器在传输带宽的一半内产生具有降低能量的光信号。 该方法的一个重要优点是通过利用单边带信号的不太明显的光谱特征，实现了简单的调制器设计。 所有这些设计都利用了通过混合调制产生分析信号的方法。

    Low level mobility mangaement procedures
    3.
    发明授权
    Low level mobility mangaement procedures 失效
    低层次的移动式疏散程序

    公开(公告)号：US06763224B2

    公开(公告)日：2004-07-13

    申请号：US09954645

    申请日：2001-09-18

    申请人： Robert J. Davies ,  Paul M. Fulton ,  Robert L. Blake

    发明人： Robert J. Davies ,  Paul M. Fulton ,  Robert L. Blake

    IPC分类号： H04B700

    CPC分类号： H04W48/14 ,  H04W84/00

    摘要： A data transmission system comprises a large number of networked data beacons interconnected and grouped together in respective clusters. In the system, a first (12) and two or more second (13, 14, 15) beacon devices are interconnected (11) as a cluster capable of wireless message transmission, and at least one mobile device (10) capable of receiving such message transmissions. The first beacon (12) is arranged to broadcast a series of inquiry messages (INQ) according to a first communications protocol, such as Bluetooth, but with the addition of an identifier for the cluster (CL). The mobile device (10) detects such inquiry messages and replies with an identifier for itself, together with message reason data. The link (A) from the first beacon device is then re-established between a selected one (14) of the second beacon devices, with interaction between the mobile device (10) and selected second beacon device (14) being controlled at least partly by the message reason data.

    摘要翻译： 数据传输系统包括大量联网数据信标，并将它们分组在一起成为各自的集群。 在系统中，将第一（12）和两个或更多个第二（13,14,15）信标设备互连（11）作为能够进行无线消息传输的集群，以及至少一个能够接收这样的信息的移动设备（10） 消息传输。 第一信标（12）被布置为根据第一通信协议（例如蓝牙）广播一系列查询消息（INQ），但是添加了用于集群（CL）的标识符。 移动设备（10）与消息原因数据一起检测这样的查询消息和对自己的标识符的回复。 然后，在所选择的第一信标设备（14）之间重新建立来自第一信标设备的链路（A），移动设备（10）与所选择的第二信标设备（14）之间的交互被至少部分地控制 通过消息原因数据。

    Logarithmic amplifier
    4.
    发明授权
    Logarithmic amplifier 失效
    对数放大器

    公开(公告)号：US06734712B2

    公开(公告)日：2004-05-11

    申请号：US10156731

    申请日：2002-05-24

    申请人： Christopher D. Holdenried ,  James W. Haslett ,  John G. McRory ,  Robert J. Davies

    发明人： Christopher D. Holdenried ,  James W. Haslett ,  John G. McRory ,  Robert J. Davies

    IPC分类号： G06G724

    CPC分类号： G06G7/24

    摘要： A parallel-summation logarithmic amplifier is described that uses a novel topology of cascaded and parallel amplifiers to achieve extremely high bandwidth. Included in the topology is a unique delay matching scheme for logarithmic amplifiers that is amenable to fabrication in integrated circuit form. The result is flat group delay over broad frequency ranges and different power levels. The resulting log amplifier is suitable for radar applications and for use in high data rate fiber-optic networks. Also described is a unique design process that yields a set of amplifier gains that closely approximate a logarithm. Also described is the novel idea of using a parallel feedback amplifier (PFA) in piecewise-approximate logarithmic amplifiers. This innovation allows for the design of broadband amplifiers with significantly different gains and similar phase characteristics, which is extremely useful when designing high-frequency logarithmic amplifiers.

    摘要翻译： 描述了并联对数放大器，其使用级联和并联放大器的新颖拓扑来实现极高带宽。 在拓扑中包括一个独特的对数放大器的延迟匹配方案，可以以集成电路形式制造。 结果是在宽频率范围和不同功率水平上的平坦组延迟。 所产生的对数放大器适用于雷达应用和用于高数据速率光纤网络。 还描述了一种独特的设计过程，其产生一组近似对数的放大器增益。 还描述了在分段近似对数放大器中使用并联反馈放大器（PFA）的新颖思想。 该创新允许宽带放大器的设计具有显着不同的增益和类似的相位特性，这在设计高频对数放大器时非常有用。

    Data delivery through portable devices
    5.
    发明授权
    Data delivery through portable devices 有权
    通过便携式设备传送数据

    公开(公告)号：US06664891B2

    公开(公告)日：2003-12-16

    申请号：US09878684

    申请日：2001-06-11

    申请人： Robert J. Davies ,  Paul J. Rankin

    发明人： Robert J. Davies ,  Paul J. Rankin

    IPC分类号： G08B2600

    CPC分类号： H04W48/16 ,  H04B1/713 ,  H04W84/00

    摘要： A communications system comprises at least one first portable communications device (12) capable of wireless message transmission and at least one second portable communications device (10) capable of receiving such a message transmission. The first device (12) is arranged to broadcast a series of inquiry messages (60) each in the form of a plurality of predetermined data fields (INQ) arranged according to a first communications protocol, such as Bluetooth. For the delivery of additional data via broadcast, the first device (12) adds to each inquiry message prior to transmission an additional data field (BCD) carrying broadcast data, with the second portable device (10) receiving the transmitted inquiry messages and reading the broadcast data from the additional data field.

    摘要翻译： 通信系统包括能够进行无线消息传输的至少一个第一便携式通信设备（12）和能够接收这样的消息传输的至少一个第二便携式通信设备（10）。 第一设备（12）被布置为以根据诸如蓝牙的第一通信协议布置的多个预定数据字段（INQ）的形式广播一系列查询消息（60）。 为了通过广播传递附加数据，第一设备（12）在发送附加数据字段（BCD）之前，在传送广播数据的附加数据字段（BCD）中添加每个查询消息，第二便携式设备（10）接收所发送的查询消息并读取 从附加数据字段广播数据。

    Product bag for dispensing and method for producing the same
    6.
    再颁专利
    Product bag for dispensing and method for producing the same 失效
    用于分配的产品袋及其制造方法

    公开(公告)号：USRE35540E

    公开(公告)日：1997-06-24

    申请号：US296145

    申请日：1994-08-26

    申请人： Robert J. Davies ,  Patrick J. Gleeson ,  Michael J. Moran

    发明人： Robert J. Davies ,  Patrick J. Gleeson ,  Michael J. Moran

    IPC分类号： B65D83/14 ,  B65D83/00

    CPC分类号： B65D83/62

    摘要： A product dispenser include a unique product bag/valve configuration. The product is stored in the product bag. Pressure in the container surrounding the bag determines the dispensing pressure. The valve has a valve extender with a unique shape to enhance sealing the valve to the bag. The product bag includes a gusset along a bottom portion. The gusset opens when product is introduced into the bag. The gusset supports the bag when in contact with a bottom dome shaped portion of the container.

    摘要翻译： 产品分配器包括独特的产品袋/阀配置。 产品存放在产品袋中。 围绕袋子的容器中的压力决定了分配压力。 该阀具有一个具有独特形状的阀增量器，以增强阀门对袋的密封性。 产品袋包括沿底部的角撑板。 当产品进入袋子时，角撑板打开。 当与容器的底部圆顶形部分接触时，角撑板支撑袋子。