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33 条记录 (耗时 0.012 秒)

    CALIBRATED REAL TIME CLOCK FOR ACQUISITION OF GPS SIGNALS DURING LOW POWER OPERATION
    2.
    发明授权
    CALIBRATED REAL TIME CLOCK FOR ACQUISITION OF GPS SIGNALS DURING LOW POWER OPERATION 有权
    校准的实时时钟，用于采集GPS信号期间，低功耗运行

    公开(公告)号：EP1451605B1

    公开(公告)日：2008-12-10

    申请号：EP02776367.1

    申请日：2002-10-30

    申请人： SiRF Technology, Inc.

    发明人： GRONEMEYER, Steven, A.

    IPC分类号： G01S3/16 ,  G06F1/14 ,  G06F1/32 ,  H03L1/02

    CPC分类号： G04G19/12 ,  G01S19/23 ,  G01S19/235 ,  G01S19/34 ,  G04C10/04 ,  G04F5/00 ,  G06F1/14 ,  G06F1/3203 ,  Y02D10/126

    摘要： Power is conserved in a Global Positioning System (GPS) receiver by shutting down selected components during periods when the GPS receiver is not actively calculating the GPS receiver location. A low power time keeping circuit accurately preserves GPS time when the selected components are deactivated. When the selected components are turned on in response to a wake-up command, time provided from the low power time keeping circuit, corrected for actual operating temperatures, and data from the GPS clock temperature/frequency table, are used to recalibrate time from a GPS oscillator. Positions of the GPS satellites are then estimated such that the real GPS time is quickly determined from the received satellite signals. Once real GPS time is determined from the detected satellite signals, the selected components are deactivated. The process described above is repeated such that accurate GPS time is maintained by the low power time keeping circuit.

    Time scale computation system including complete and weighted ensemble definition
    4.
    发明公开
    Time scale computation system including complete and weighted ensemble definition 失效
    时间尺度计算系统，包括完整的和加权的整体定义

    公开(公告)号：EP0461557A3

    公开(公告)日：1994-02-23

    申请号：EP91109359.9

    申请日：1991-06-07

    申请人： TIMING SOLUTIONS CORPORATION

    发明人： Stein, Samuel R.

    IPC分类号： G04G3/00 ,  G04G7/02

    CPC分类号： G04F5/00

    摘要： An improved system for providing ensemble time from an ensemble of oscillators is provided. In the system, a more complete ensemble definition permits a more accurate ensemble time to be calculated. The system takes into account at least weighted time and weighted frequency aspects or weighted time and weighted frequency aging aspects of each oscillator in the ensemble. Preferably, the system takes into account all of the weighted time aspects, weighted frequency aspect, and weighted frequency aging aspects for each oscillator in the ensemble. The weights with respect to each clock can be chosen to be either zero or any positive value such that the sum of the weights for each aspect sum to one. The system can be implemented using a Kalman approach.

    摘要翻译： 提供了一种用于从振荡器集合提供集合时间的改进系统。 在该系统中，更完整的集合定义允许计算更准确的集合时间。 该系统至少考虑了系综中每个振荡器的加权时间和加权频率方面或加权时间和加权频率老化方面。 优选地，该系统考虑集合中每个振荡器的所有加权时间方面，加权频率方面和加权频率老化方面。 相对于每个时钟的权重可以选择为零或任何正值，使得每个方面的权重总和为1。 该系统可以使用卡尔曼方法来实施。

    Equivalent time pseudorandom sampling system
    9.
    发明公开
    Equivalent time pseudorandom sampling system 失效
    等效时间PSEUDORANDOM采样系统

    公开(公告)号：EP0244537A3

    公开(公告)日：1990-05-09

    申请号：EP86308662.5

    申请日：1986-11-06

    申请人： TEKTRONIX, INC.

    发明人： Agoston, Agoston

    IPC分类号： G04F10/00 ,  G01R13/34

    CPC分类号： G01R19/255 ,  G01R13/32 ,  G01R13/34 ,  G04F5/00

    摘要： An equivalent time pseudorandom sampling system samples a repetitive waveform within each of several narrow acquisition windows bounding repetitive sections of the waveform in order to obtain equivalent time sample data characterizing the shape of the waveform included within the acquisition windows. The period between successive triggering events is measured and sampling is delayed following an initiating triggering event by delay time adjusted according to the measured period so as to maximize the probability that sampling will occur within an acquisition window. The time difference between samples and subsequent triggering event is measured with high accuracy and resolution utilizing a time interval measurement system based on a dual vernier interpolation.

    RANDOM LIGHT COLLECTOR DEVICE
    10.
    发明公开
    RANDOM LIGHT COLLECTOR DEVICE 审中-公开
    ZUFÄLLIGELICHTSAMMELVORICHHTUNG

    公开(公告)号：EP3182228A1

    公开(公告)日：2017-06-21

    申请号：EP15200263

    申请日：2015-12-15

    申请人： ADVA OPTICAL NETWORKING SE

    发明人： BERTHOUD PATRICK

    IPC分类号： G04F5/00

    CPC分类号： G01J1/0422 ,  G01J1/0455 ,  G01J1/4257 ,  G01J2001/446 ,  G04F5/00 ,  H01S3/13 ,  H01S2301/02

    摘要： The invention relates to a random light collector device comprising a reflecting cavity (27) configured to enclose a random light source (33, 41) that randomly transmits photons in essentially the whole solid angle of 4rr steradian, the reflecting cavity (27) having an inner wall being adapted to reflect the photons in such a way that at least a portion of once or multiply reflected photons is directed to an output port of the reflecting cavity (27) and guiding means for directing the reflected photons and photons which are directly emitted to the output port (49) to a photodetector (35, 43). According to the invention, the guiding means is a hollow tube (51) having an inner wall being adapted to reflect the photons, wherein a first end of the hollow tube (51) is connected to or positioned adjacent to the output port (49) of the reflecting cavity (27) and wherein the photodetector (35, 43) is provided within the hollow tube (35) or at a second end thereof in such a way that a sensitive area of the photodetector (35, 43) covers the whole cross-section of the second end.

    摘要翻译： 本发明涉及一种包括反射腔（27）的随机光收集器装置，该反射腔配置成包围随机透射基本上4rr立体角的整个立体角的光子的随机光源（33,41），反射腔（27）具有 内壁适于反射光子，使得一次或多次反射的光子的至少一部分被引导到反射腔（27）的输出端口，并且引导装置用于引导直接发射的反射光子和光子 到输出端口（49）到光电检测器（35,43）。 根据本发明，引导装置是具有适于反射光子的内壁的中空管（51），其中中空管（51）的第一端连接到或位于输出端口（49）附近， ，并且其中光检测器（35,43）设置在中空管（35）内或其第二端处，使得光检测器（35,43）的敏感区域覆盖整个反射腔 第二端的横截面。