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    Radio signal controlled digital clock
    2.
    发明授权
    Radio signal controlled digital clock 失效
    无线电信号控制数字时钟

    公开(公告)号：US4823328A

    公开(公告)日：1989-04-18

    申请号：US161792

    申请日：1988-02-29

    申请人： Charles C. Conklin ,  Michael W. Faber ,  David Schachter ,  Philip M. Spira ,  Chi-Wen Wang ,  Paul L. Williams

    发明人： Charles C. Conklin ,  Michael W. Faber ,  David Schachter ,  Philip M. Spira ,  Chi-Wen Wang ,  Paul L. Williams

    IPC分类号： G04C11/00 ,  G04G5/00 ,  G04G7/02 ,  H04L7/00 ,  G04C11/02

    CPC分类号： G04R40/06 ,  G04R20/18

    摘要： A radio signal controlled clock which decodes time information in a radio signal and thereby determines the current time. The clock collects and stores radio signal data as soon as a reasonably decodeable radio signal is located, even before the minute boundary of the radio signal's time base has been located. This data is stored and later used for decoding and verifying the digits of the time information after the minute boundary has been located. In another aspect of the present invention, an internal counter in the clock is periodically resynchronized with the radio signal, and the average of the adjustments required for this resynchronization is maintained. When no radio signal is available, or the radio signal is too noisy to be reliably decoded, the average internal counter adjustment value is used to periodically adjust the internal counter--and thereby helps to keep the clock's internal counter as closely synchronized with the radio signal's time bases as possible when the radio signal is not available or not usable.

    High precision radio signal controlled continuously updated digital clock
    3.
    发明授权
    High precision radio signal controlled continuously updated digital clock 失效
    高精度无线电信号控制连续更新的数字时钟

    公开(公告)号：US4768178A

    公开(公告)日：1988-08-30

    申请号：US17666

    申请日：1987-02-24

    申请人： Charles C. Conklin ,  Stephen O. Jeppson ,  Ronald W. Mongeon ,  David Schachter ,  Philip M. Spira ,  Paul L. Williams

    发明人： Charles C. Conklin ,  Stephen O. Jeppson ,  Ronald W. Mongeon ,  David Schachter ,  Philip M. Spira ,  Paul L. Williams

    IPC分类号： G04G5/00 ,  G04R20/10 ,  G04R40/06 ,  G04C11/02 ,  H04B1/10

    CPC分类号： G04R40/06 ,  G04R20/10

    摘要： A method and apparatus for synchronizing a clock to broadcast time-based signals, said time-based signals including encoded timing information, the method comprising the steps ofreceiving said time-based signals,decoding said time-based signals to derive a plurality of digits from said timing information representing actual clock time, andseparately verifying the correctness of each of said digits, said correctness verifying step including the steps of separately comparing each said derived digit with at least one corresponding previously decoded derived digit and verifying said derived digit when it meets a predefined verification test based on the consistency of said derived digit with said at least once corresponding previously decoded derived digit, repeating said comparison and verifying steps as said time-based signals are decoded until each said derived digit has been separately verified, and generating a lockon signal when all of said derived digits have been verified.

    摘要翻译： 一种用于将时钟同步到广播基于时间的信号的方法和装置，所述基于时间的信号包括编码定时信息，所述方法包括以下步骤：接收所述基于时间的信号，解码所述基于时间的信号以导出多个数字 从表示实际时钟时间的所述定时信息中分别验证每个所述数字的正确性，所述正确性验证步骤包括以下步骤：将每个所述导出的数字与至少一个对应的先前解码的导出数字进行分开比较， 基于所述导出的数字与所述至少一次对应的先前解码的导出数字的一致性来满足预定义的验证测试，重复所述比较和验证步骤，因为所述基于时间的信号被解码，直到每个所述派生的数字已被单独验证，并且生成 当所有所述派生数字已被验证时，锁定信号。