| 摘要 |
An skew adjusting device for adjusting the skew between the positive- and negative-side differential signals of a differential signal inputted from an external device through an external transmission line. The skew adjusting device comprises a positive-side transmission line for propagating the positive-side differential signal inputted into an input end, a negative-side transmission line for propagating the negative-side differential signal inputted into an input end, differential comparators so connected to the positive- and negative-side transmission lines that the differences between the wiring length of the positive side transmission line from the input end and that of the negative-side transmission line from the input end are different from one another and receiving the positive- and negative-side differential signals, and a selection section for selecting the signal received by the differential comparator which has the minimum skew between the positive-side path from the output terminal of the external device which outputs the positive-side differential signal to the differential comparator and the negative-side path from the output terminal of the external device which outputs the negative-side differential signal to the differential comparator.
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