| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a symptom of error occurrence prior to error occurrence. <P>SOLUTION: A clock extracting circuit includes: a clock recovery circuit 11 for recovering a clock signal CK1 related to a data input signal Din from the data input signal Din; a sampling clock generating circuit 12 for generating one or more sampling clock signals CK2, CK3 each being synchronized with the recovered clock signal CK1 and having a fixed phase difference from the recovered clock signal CK1; a sample/hold circuit 13 for sampling/holding the data input signal Din in accordance with the one or more sampling clock signals CK2, CK3 and the recovered clock signal CK1; and an error determining circuit 14 for outputting an error symptom signal Ep when all logic values of sampling results in the sample/hold circuit 13 are different from one another. <P>COPYRIGHT: (C)2010,JPO&INPIT |
