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    • 41. 发明申请
    • Optical fibre-based devices utilising the raman effect
    • 使用拉曼效应的基于光纤的设备
    • US20050147370A1
    • 2005-07-07
    • US10490907
    • 2002-09-27
    • Zulfadzli YusoffWalter BelardiPeh TehJu LeeTanya MonroDavid Richardson
    • Zulfadzli YusoffWalter BelardiPeh TehJu LeeTanya MonroDavid Richardson
    • G02F1/365G02B6/20
    • G02F1/365G02F2202/32
    • An optical fibre device based on the Raman effect comprises a first optical source to provide light at a first wavelength, and a holey optical fibre which receives the light from the first optical source such that optical gain or loss is provided at a second wavelength by the effect of Raman scattering within the fibre. For optical gain, the second wavelength is longer than the first wavelength, and the device can be operated as an amplifier, or as a laser if optical feedback is provided. For optical loss, the second wavelength is shorter than the first, and the device may be used as an optical modulator. The fibre may be fabricated from pure silica, although other undoped or doped materials may alternatively be used to tailor properties of the fibre such as gain spectrum, bandwidth, power handling capability and mode propagation.
    • 基于拉曼效应的光纤装置包括提供第一波长的光的第一光源和接收来自第一光源的光的多孔光纤,使得在第二波长处提供光增益或损耗, 纤维内拉曼散射的作用。 对于光学增益,第二波长比第一波长长,并且器件可以作为放大器工作,或者如果提供光学反馈则作为激光器。 对于光损耗,第二波长比第一波长短,该器件可以用作光调制器。 纤维可以由纯二氧化硅制成,尽管其它未掺杂或掺杂的材料可以替代地用于定制纤维的性质,例如增益谱,带宽,功率处理能力和模式传播。
    • 43. 发明授权
    • Apparatus and method for agent-based feedback collection in a data broadcasting network
    • 数据广播网络中基于代理的反馈收集的装置和方法
    • US06449632B1
    • 2002-09-10
    • US09285214
    • 1999-04-01
    • Esther DavidShlomo KipnisSarit KrausDavid Richardson
    • Esther DavidShlomo KipnisSarit KrausDavid Richardson
    • G06F1516
    • H04H60/46
    • A system for collecting user feedback in a data broadcasting system, the system for collecting user feedback including a multiplicity of user profile agents, each user profile agent being associated with one of a multiplicity of users of the data broadcasting system and being operative to create a user profile based on activity of the one user, a user profile subsystem associated with a plurality of user profile agents chosen from among the multiplicity of user profile agents and operative to derive an integrated user profile based on the plurality of user profiles created by the plurality of user profile agents, and a broadcasting agent operatively associated with a broadcast center of the data broadcasting system and in operative communication with the user profile subsystem and receiving therefrom the integrated user profile.
    • 一种用于在数据广播系统中收集用户反馈的系统,用于收集包括多个用户简档代理的用户反馈的系统,每个用户简档代理与数据广播系统的多个用户之一相关联并且可操作以创建 基于一个用户的活动的用户简档,与从多个用户简档代理中选择的多个用户简档代理相关联的用户简档子系统,并且可操作以基于由多个用户简档代理创建的多个用户简档来导出集成用户简档 用户简档代理,以及与数据广播系统的广播中心可操作地相关联并与用户简档子系统进行操作性通信并从其接收集成用户简档的广播代理。
    • 45. 发明授权
    • Magnetoresistive transducer with four-lead contact
    • 具有四引线接触的磁阻传感器
    • US5959811A
    • 1999-09-28
    • US006307
    • 1998-01-13
    • David Richardson
    • David Richardson
    • G11B5/39
    • G11B5/3903G11B5/3906
    • A magnetic head includes a magnetoresistive read transducer which comprises a central active region and two end regions. Bias current leads are connected respectively to end regions for current biasing of the transducer. Signal sensing leads is also are connected respectively to end regions for directing sensed voltage to a signal amplifier. The bias current and the sensed signal assume separate electrical paths. The current crowding effect in the bias current path does not affect the signal sensing path. Thus the transducer can sense signal with improved sensitivity and high signal-to-noise ratio. In one embodiment, at each end region, the bias current lead and the signal sensing lead are coplanar and are bifurcated to effectuate separate electrical paths. In another embodiment, the signal sensing lead and the bias current lead are electrically connected together via an electrical feedthrough at each end region, but are dielectrically separated by an insulating layer at other regions.
    • 磁头包括磁阻读取换能器,其包括中心主动区域和两个端部区域。 偏置电流引线分别连接到端部区域,用于传感器的电流偏置。 信号感测引线也分别连接到终端区域,用于将感测到的电压引导到信号放大器。 偏置电流和感测信号呈现分开的电路径。 偏置电流路径中的当前拥挤效应不影响信号感测路径。 因此,传感器可以以更高的灵敏度和更高的信噪比感测信号。 在一个实施例中,在每个端部区域,偏置电流引线和信号感测引线是共面的并且被分叉以实现单独的电路径。 在另一个实施例中,信号感测引线和偏置电流引线通过每个端部区域处的电馈通电连接在一起,但是在其它区域被绝缘层介电地分开。