| 摘要 |
PURPOSE:To attain the comparison of long words at a high speed and at low cost. CONSTITUTION:The comparators 21-23 are provided to compare the 1,6-bit data with each other. The data DVs are supplied to the comparator 21 and also to the comparators 22 and 23 via the AND gates 30 and 31 respectively. The flip-flops 24 and 25 are set based on the comparison results of both comparators 21 and 22, and both gates 30 and 31 are controlled. The comparison result of the comparator 23 is outputted as a synchronization detecting signal Ds. The word 'FF 00 00' included in the data DVs is divided into three pieces end successively compared with each other by the comparators 21-23. Thus the high speed performance of each comparator is secured to the full. In such a constitution, no exclusive comparator is needed and the 16-bit comparators 21-23 are available. |
