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    Distributed synchronization and timing system
    1.
    发明公开
    Distributed synchronization and timing system 审中-公开
    分布式同步和定时系统

    公开(公告)号：EP2784621A3

    公开(公告)日：2014-11-12

    申请号：EP14174586.9

    申请日：2007-02-15

    申请人： Chronologic Pty Ltd

    发明人： Foster, Peter Graham ,  Kouznetsov, Alex ,  Vlasenko, Mykola

    IPC分类号： G06F1/12 ,  G06F1/10

    CPC分类号： G06F1/12 ,  G06F1/14

    摘要： An apparatus for generating a local clock signal, comprising: a USB adapted to receive a USB data stream; a reference signal source for providing a reference signal; timing circuitry for determining a frequency of a periodic data structure decoded from the USB data stream by comparing the periodic data structure with the reference signal; and circuitry for generating a local clock signal having a desired local clock frequency. The circuitry for generating the local clock signal is configured to receive an information signal having data indicative of the desired local clock frequency and to generate the local clock signal by: i) generating a clock synchronization signal comprising clock and trigger signals by combining the periodic data structure with a scaling factor; ii) generating a divided signal by dividing the reference signal; iii) manipulating the clock synchronization signal and the divided signal according to the desired local clock frequency; iv) generating a phase comparison signal by phase comparing the manipulated clock synchronization signal and divided signal; and v) generating the local clock signal with a controlled oscillator clock generator of the circuitry by using the phase comparison signal to control the controlled oscillator clock generator.

    Synchronized multichannel universal serial bus
    4.
    发明公开
    Synchronized multichannel universal serial bus 审中-公开
    Synchronisierter Multikanal-USB

    公开(公告)号：EP2270676A1

    公开(公告)日：2011-01-05

    申请号：EP10181679.1

    申请日：2003-07-17

    申请人： Chronologic Pty Ltd

    发明人： Foster, Peter Graham ,  Goldsmith, Clive Alexander ,  Klovekorn, Patrick ,  Weigold, Adam Mark

    IPC分类号： G06F13/42

    CPC分类号： G06F13/4278 ,  G06F13/426 ,  H04J3/0682 ,  H04L7/0008

    摘要： The invention provides a method of measuring the propagation time of signals from a USB host to a USB device within a USB tree, comprising designating a master USB device in said USB tree, generating or designating specified signal structures for transmission in the USB data traffic, transmitting said specified signal structures to said USB device in a predefined sequence, monitoring said USB traffic by means of said master USB device for said specified signal structures and for specified response signals from said USB device, generating event triggering signals local to said master USB device corresponding to decoding of said specified signal structures, generating event triggering signals local to said master USB device corresponding to decoding of response signals from said USB device, measuring a time interval between said event triggering signals in said master USB device, and determining a propagation time from said USB host to said USB device from said time interval.

    摘要翻译： 本发明提供一种测量来自USB主机的信号到USB树中的USB设备的传播时间的方法，包括在所述USB树中指定主USB设备，生成或指定用于在USB数据业务中传输的指定信号结构， 以预定的顺序将所述指定的信号结构发送到所述USB设备，通过所述主USB设备监测所述USB业务，用于所述指定的信号结构以及来自所述USB设备的指定的响应信号，产生所述主USB设备本地的事件触发信号 对应于所述指定信号结构的解码，产生对应于来自所述USB设备的响应信号的解码的所述主USB设备本地的事件触发信号，测量所述主USB设备中的所述事件触发信号之间的时间间隔，以及确定传播时间 从所述USB主机到所述USB设备从所述时间间隔。

    METHOD AND APPARATUS FOR SYNCHRONISING THE LOCAL TIME OF A PLURALITY OF INSTRUMENTS
    8.
    发明公开
    METHOD AND APPARATUS FOR SYNCHRONISING THE LOCAL TIME OF A PLURALITY OF INSTRUMENTS 有权
    方法和设备，用于同步多台仪器的本地时间

    公开(公告)号：EP2432754A1

    公开(公告)日：2012-03-28

    申请号：EP10777231.1

    申请日：2010-05-20

    申请人： Chronologic Pty Ltd

    发明人： FOSTER, Peter Graham

    IPC分类号： C06F1/12

    CPC分类号： G06F13/423 ,  G06F1/08 ,  G06F1/12 ,  G06F11/3027 ,  G06F13/10 ,  G06F13/4022 ,  G06F13/4027 ,  G06F13/405 ,  G06F13/4282 ,  G06F2213/0042 ,  H04L7/04 ,  H04L7/08

    摘要： A method of determining the downstream propagation time of signals from a USB Host Controller across one or more USB cables and one or more USB Hubs to a Super Speed USB device, comprising: opening at least one Isochronous communication pipe between the Host Controller and the Super Speed USB device; ensuring that the Super Speed USB device is in link state U0 in preparation for receiving an ITP; controlling the USB Host Controller to send a plurality of ITPs across the Isochronous communication pipe, the ITPs containing respective first timestamps indicative of times at which the Host Controller generated the respective ITPs; locking a local clock of the Super Speed USB device to information that comprises the first timestamp, derived from one or more of the ITPs, the locking being in respect of frequency such that the local clock is syntonised to a timebase of the USB Host Controller and a notion of time of the local clock is substantially synchronised to a notion of time of the USB Host Controller but with a constant phase delay equal to an average downstream propagation time of the plurality of ITPs from the USB Host Controller to the Super Speed USB device; the Super Speed USB device transmitting a plurality of signals to the USB Host Controller, each of the signals containing a second timestamp indicative of a local time in the time domain of the Super Speed USB device when the respective signal was generated by the Super Speed device; the USB Host Controller creating a third timestamp indicative of a time of reception of the respective signals from the Super Speed USB device; the USB Host Controller determining a time period from one or more respective time differences between corresponding second and third timestamps, the time period being indicative of a sum of a downstream propagation time and an upstream propagation time; and determining the downstream propagation time from the time period.