| 摘要 |
PROBLEM TO BE SOLVED: To decrease the number of logical gates constructing a circuit and to reduce a layout area by using the comparators which detect the specific patterns and using no conventional priority encoder. SOLUTION: This header detector previously stores the bit stream to be processed in a memory 101 in bite alignment and therefore has not always to use a priority encoder to calculate the number of continuous zeros. Instead, the detector uses the comparators 103 and 104 which can detect the specific patterns to detect a header. Thus, an overall circuit scale of the header detector can be reduced and a layout of a smaller area is attained even when the fast bit processing capability is required to the detector and the number of bits to be processed at a time is increased. |
