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    • 6. 发明申请
    • Phase Comparator
    • 相位比较器
    • US20070229118A1
    • 2007-10-04
    • US11504694
    • 2006-08-16
    • Tatsuya KobayashiHitoyuki TagamiKatsuhiro ShimizuKenkichi Shimomura
    • Tatsuya KobayashiHitoyuki TagamiKatsuhiro ShimizuKenkichi Shimomura
    • H03D13/00
    • H03D13/003
    • A phase comparator includes: first and second detecting units for detecting an amplitude value of a clock signal at falling timing or rising timing of a data signal; an edge comparing unit for identifying as to whether the first detecting unit detects an amplitude value under a rising state or a falling state to output a first identification result, and for identifying as to whether the second detecting unit detects an amplitude value under a rising state or a falling state to output a second identification result; first and second polarity inverting units for inverting a polarity of output of the first and second detecting units; and a signal selecting unit for selecting one of output values of the first and second polarity inverting units in response to a polarity of the data signal to output the selected output value.
    • 相位比较器包括:第一和第二检测单元,用于检测下降定时时钟信号的振幅值或数据信号的上升定时; 边缘比较单元,用于识别第一检测单元是否在升高状态或下降状态下检测振幅值以输出第一识别结果,并且用于识别第二检测单元是否在升高状态下检测振幅值 或下降状态输出第二识别结果; 第一和第二极性反转单元,用于反转第一和第二检测单元的输出的极性; 以及信号选择单元,用于响应于数据信号的极性来选择第一和第二极性反转单元的输出值之一,以输出所选择的输出值。
    • 9. 发明授权
    • Light receiver
    • 光接收器
    • US06775482B1
    • 2004-08-10
    • US09654055
    • 2000-09-01
    • Kenkichi ShimomuraKatsuhiro Shimizu
    • Kenkichi ShimomuraKatsuhiro Shimizu
    • H04B1004
    • H04L7/0075H04B10/299H04J14/02H04J14/08
    • Because the phase comparison of the light signal data row and the light clock signal, and the coding of the light signal by the light signal, are simultaneously conducted, the influence of the phase variation in the signal path is not affected in principle, and the optimum phase condition is automatically established/maintained, and thereby, the present invention operates as an all-light type light receiver by which the light data and light clock are reproduced. Further, because the electric signal used herein exists in the range from the DC to the frequency of the difference between the light signal data row and the light clock signal, problems peculiar to the high speed electric signal can be avoided.
    • 由于光信号数据行与光时钟信号的相位比较以及光信号的光信号的编码同时进行,信号路径中的相位变化的影响原则上不受影响, 自动建立/维持最佳相位条件,从而本发明作为再现光数据和光时钟的全光型光接收器工作。 此外,由于这里使用的电信号存在于从光信号数据行和光时钟信号之间的差的DC到频率的范围内,所以可以避免高速电信号特有的问题。