Method and system for transferring digital telephone circuits
    1.
    发明授权
    Method and system for transferring digital telephone circuits 失效
    传输数字电话电路的方法和系统

    公开(公告)号:US5764633A

    公开(公告)日:1998-06-09

    申请号:US508387

    申请日:1995-07-31

    IPC分类号: H04Q3/00 H04L12/50 H04Q11/00

    CPC分类号: H04Q3/0075

    摘要: A digital telephone circuit is transferred from an old line to a new line. Before the transfer, a first stage delay circuit is inserted, wherein the delay of the data is incrementally adjusted to match the delay of a data control element. The data control element is then inserted in series with the data on the old line. The data control element incrementally adjust the delay and amplitude of the data on the old line to match that of the data on the new line. The incremental adjustments to delay and amplitude are within the specifications of the circuit, so as to minimize interruptions to the circuit. Interruptions are also minimized when the circuit is transferred to the new line. The data control element also introduces variations into the data at an upstream location. These are detected at a downstream location and are used for testing and communication purposes. The variations are removed from the data at the downstream end. The new line is used for communications between the transfer locations before the transfer. After the transfer occurs, the old line is used for communications.

    摘要翻译: 数字电话电路从旧线传输到新线。 在传送之前,插入第一级延迟电路,其中数据的延迟被递增地调整以匹配数据控制元件的延迟。 然后将数据控制元素与旧行上的数据串联插入。 数据控制元素逐渐调整旧行数据的延迟和幅度,使其与新行上的数据相匹配。 对延迟和幅度的增量调整在电路的规格范围内,以最小化电路的中断。 当电路传输到新线路时,中断也被最小化。 数据控制元件还在上游位置引入数据变化。 这些在下游位置被检测并用于测试和通信。 这些变化从下游的数据中删除。 新线路用于转移前的转移地点之间的通信。 转移发生后,旧线路用于通信。

    Method and apparatus for analyzing resistive faults on telephones cables
    2.
    发明授权
    Method and apparatus for analyzing resistive faults on telephones cables 失效
    用于分析电话线缆电阻故障的方法和装置

    公开(公告)号:US5606592A

    公开(公告)日:1997-02-25

    申请号:US432667

    申请日:1995-05-02

    CPC分类号: H04M1/24 H04M1/74 H04M3/30

    摘要: Resistive faults are analyzed on a conductor in a telephone line by first charging the conductor to an initial voltage. The conductor is allowed to float for a finite amount of time, allowing some of the charge on the conductor to leak through any resistive fault. Then, the voltage of the conductor is measured and compared to the initial voltage. Loss of voltage indicates a resistive fault. This information can be used to provide an indication of the accuracy of a capacitance measurement and can be used to correct the capacitance measurement to account for the error due to the resistive fault.

    摘要翻译: 通过首先将导体充电到初始电压,在电话线路中的导体上分析电阻性故障。 导体允许浮动一段有限的时间,允许导体上的一些电荷通过任何电阻故障泄漏。 然后,测量导体的电压并将其与初始电压进行比较。 电压损失表示电阻故障。 该信息可用于提供电容测量精度的指示,并且可用于校正电容测量以解决由于电阻故障引起的误差。

    Passive electrical marker for underground use and method of making
thereof
    4.
    发明授权
    Passive electrical marker for underground use and method of making thereof 有权
    地下无源电标记及其制作方法

    公开(公告)号:US6097293A

    公开(公告)日:2000-08-01

    申请号:US292135

    申请日:1999-04-15

    IPC分类号: G01V15/00 G08B13/14

    CPC分类号: F16L1/11 G01V15/00

    摘要: A passive electrical marker has tuned circuits, each of which includes a coil and a capacitance. The tuned circuits are oriented with respect to each other in a predetermined arrangement so as to provide a broader spatial response. A foamed core inside of the tuned circuits maintains the tuned circuits in their respective orientations and protects the tuned circuits from mechanical shock. A shell or housing around the foamed tuned circuits provides environmental protection to the tuned circuits. The tuned circuits can be foamed together in a mold and then placed into the housing. Alternatively, the tuned circuits can be foamed together inside of a housing, which housing maintains the orientations between the tuned circuits during foaming. As still another alternative, the housing can be applied to the outside of the foamed tuned circuits as a coating.

    摘要翻译: 无源电标记器具有调谐电路,每个电路包括线圈和电容。 调谐电路以预定的布置相对于彼此定向,以便提供更宽的空间响应。 调谐电路内部的发泡芯保持调谐电路各自的方向,并保护调谐电路免受机械冲击。 发泡调谐电路周围的壳体或壳体为调谐电路提供环境保护。 调谐电路可以在模具中一起发泡,然后放入外壳中。 或者,调谐电路可以在壳体内发泡在一起,该壳体在发泡期间保持调谐电路之间的取向。 作为另一替代方案,壳体可以作为涂层施加到泡沫调谐回路的外部。

    Probe for sampling differential electromagnetic fields
    5.
    发明授权
    Probe for sampling differential electromagnetic fields 失效
    差分电磁场采样探头

    公开(公告)号:US5703928A

    公开(公告)日:1997-12-30

    申请号:US533844

    申请日:1995-09-26

    CPC分类号: H04M1/24 G01R1/07 G01R29/0878

    摘要: A probe for use in sampling signals from a pair of telephone wires has two conductors that are separated from each other by an insulating material such as a circuit board. Each of the conductors has an overall size and has plural nonconductive interstices therein so as to reduce the capacitance of the probe. In one embodiment, each of the conductors is shaped like a comb having conductive strips. Each of the conductors could alternatively be shaped in a zig zag manner. The telephone wires are oriented parallel to the strips so as to enhance coupling therebetween. The probe can have plural channels thereon, such as two conductors on each side of the insulating material. The strips of one conductor are located in the gaps of the other conductor which on the same side of the insulating material. The probe can reduce common mode noise by being balanced. A grounded guard trace on each side of the insulating material snubs homogeneous electric fields.

    摘要翻译: 用于对来自一对电话线的信号进行采样的探针具有通过诸如电路板之类的绝缘材料彼此分离的两个导体。 每个导体具有总体尺寸并且在其中具有多个非导电间隙,以便减小探针的电容。 在一个实施例中,每个导体成形为具有导电条的梳状物。 每个导体可以替代地以锯齿形的方式成形。 电话线平行于条带定向,以增强它们之间的耦合。 探针可以在其上具有多个通道,例如在绝缘材料的每一侧上的两个导体。 一个导体的条带位于绝缘材料的同一侧的另一导体的间隙中。 探头可以通过平衡来降低共模噪声。 绝缘材料两侧的接地保护迹线会阻塞均匀的电场。

    Method and apparatus for filtering unwanted noise while amplifying a desired signal
    6.
    发明授权
    Method and apparatus for filtering unwanted noise while amplifying a desired signal 有权
    用于在放大期望信号的同时滤除不想要的噪声的方法和装置

    公开(公告)号:US06946850B2

    公开(公告)日:2005-09-20

    申请号:US10057752

    申请日:2001-10-25

    摘要: A method and an apparatus for detecting signals in an electromagnetically noisy environment by detecting electromagnetic signals comprising a noise signal and a known signal, and compressing the electromagnetic signal to thereby generate a compressed signal. The compressed signal is filtered to generate a filtered signal comprising substantially the known signal, and the filtered signal is expanded.

    摘要翻译: 一种用于通过检测包括噪声信号和已知信号的电磁信号来检测电磁噪声环境中的信号的方法和装置,并且压缩电磁信号从而产生压缩信号。 对压缩信号进行滤波以产生包括基本上已知信号的滤波信号,并且滤波后的信号被扩展。