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    • 2. 发明申请
    • CLOCK SUPPLY DEVICE AND TRANSMISSION DEVICE
    • 时钟供应装置和传输装置
    • US20100189109A1
    • 2010-07-29
    • US12693436
    • 2010-01-25
    • Takashi NakajimaAkio MorimotoKazunori KawabeTatsuru Iwaoka
    • Takashi NakajimaAkio MorimotoKazunori KawabeTatsuru Iwaoka
    • H04L12/56H04J3/06
    • H04J3/0644H04J3/0685H04L7/033
    • A clock supply device includes a receiving unit configured to receive frame synchronization packets from an asynchronous network and generate timing signals; a phase comparing unit configured to perform phase comparison by comparing phases of the timing signals generated by the receiving unit and clock signals generated by an internal oscillating unit; a phase variation detection unit configured to detect a frequency variation of the frame synchronization packets based on a trend of a variation amount of a phase difference that is obtained by performing a statistical process on count values obtained as a result of the phase comparison; and an oscillating frequency control unit configured to control an oscillating frequency of the internal oscillating unit when the phase variation detection unit detects the frequency variation of the frame synchronization packets.
    • 时钟提供装置包括:接收单元,被配置为从异步网络接收帧同步分组并产生定时信号; 相位比较单元,被配置为通过比较由接收单元生成的定时信号的相位和由内部振荡单元生成的时钟信号来执行相位比较; 相位变化检测单元,其被配置为基于通过对作为相位比较的结果获得的计数值执行统计处理获得的相位差的变化量的趋势来检测帧同步分组的频率变化; 以及振荡频率控制单元,被配置为当相位变化检测单元检测到帧同步分组的频率变化时,控制内部振荡单元的振荡频率。
    • 4. 发明授权
    • Clock supply device and transmission device
    • 时钟供应装置和传输装置
    • US08223772B2
    • 2012-07-17
    • US12693436
    • 2010-01-25
    • Takashi NakajimaAkio MorimotoKazunori KawabeTatsuru Iwaoka
    • Takashi NakajimaAkio MorimotoKazunori KawabeTatsuru Iwaoka
    • H04L12/28
    • H04J3/0644H04J3/0685H04L7/033
    • A clock supply device includes a receiving unit configured to receive frame synchronization packets from an asynchronous network and generate timing signals; a phase comparing unit configured to perform phase comparison by comparing phases of the timing signals generated by the receiving unit and clock signals generated by an internal oscillating unit; a phase variation detection unit configured to detect a frequency variation of the frame synchronization packets based on a trend of a variation amount of a phase difference that is obtained by performing a statistical process on count values obtained as a result of the phase comparison; and an oscillating frequency control unit configured to control an oscillating frequency of the internal oscillating unit when the phase variation detection unit detects the frequency variation of the frame synchronization packets.
    • 时钟提供装置包括:接收单元,被配置为从异步网络接收帧同步分组并产生定时信号; 相位比较单元,被配置为通过比较由接收单元生成的定时信号的相位和由内部振荡单元生成的时钟信号来执行相位比较; 相位变化检测单元,其被配置为基于通过对作为相位比较的结果获得的计数值执行统计处理获得的相位差的变化量的趋势来检测帧同步分组的频率变化; 以及振荡频率控制单元,被配置为当相位变化检测单元检测到帧同步分组的频率变化时,控制内部振荡单元的振荡频率。