| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a phase comparator compatible with both a full rate and a half rate. <P>SOLUTION: This phase comparator is provided with a first detection means 1 for detecting the amplitude value of a clock signal in the falling timing of a data signal; a second detection means 2 for detecting the amplitude value of the clock signal in the rising timing of the data signal; an edge comparing means 3 for outputting a first identification result by identifying whether or not the amplitude value of the rising status or falling status of the clock signal is being detected by the first detection means 1, and for identifying whether or not the amplitude value of the rising statue or falling status of the clock signal is being detected by the second detection means 2, and for outputting the second identification result; a first polarity inverting means 4 for inverting the polarity of the output of the first detection means 1 according to the first identification result; a second polarity inverting means 5 for inverting the polarity of the output of the second detection means 2 according to the second identification result; and a signal selection means 6 for selecting and outputting the output value of the first or the second polarity inverting means 4 and 5 according to the polarity of the data signal. <P>COPYRIGHT: (C)2008,JPO&INPIT |
