AUTOMATIC SKEW ELIMINATION SYSTEM AND AUTOMATIC SKEW CORRECTION METHOD

摘要

PROBLEM TO BE SOLVED: To realize a skew elimination system which can be operated with a high precision in a wider input value range and a wider temperature range and is simple and robust with respect to a system where automatic skew eliminating tuning and arrangement are executed through high-speed parallel interconnections in a high-performance digital system in order to compensate the inter-bit skew. SOLUTION: VDL is not used but digital elements such as registers and multiplexers are used to execute automatic skew elimination tuning and arrangement procedures. Further, signals 1 to 4 on individual interconnections are extended. This system includes a skew elimination control mechanism 135 and plural skew elimination sub-systems 182 and 190. The skew elimination control mechanism 135 calculates the extent of delay required for correction of the skew on each interconnection and supplies different (or proper) extents of delay to skew elimination subsystems in reception ends of individual interconnections.