Abstract: An n-bit input value is partitioned into groups of most significant and least significant bits. Each group respectively describes integers J and K that comprise the input value; J and K need not each have the same radix. J and K are applied as addresses to respective Random Access Memories (RAM's). Each RAM is previously pre-loaded with information specific to the range or ranges to be detected, and each outputs respective J- and K-type information as a function of the applied J and K. The J- and K-type information is merged together and applied as an address to a third RAM whose output indicates which range, if any, the input value lies within. The output of the third RAM can be in either a bit-per-range format or a range-per-code format. The former is faster and accommodates arbitrary ranges, while the latter allows recognition of significantly more disjoint ranges at the expense of the extra time required for subsequent interpretation of the range code.

Abstract: An n-bit input value is partitioned into groups of most significant and least significant bits. Each group respectively describes integers J and K that comprise the input value; J and K need not each have the same radix. J and K are applied as addresses to respective Random Access Memories (RAM's). Each RAM is previously pre-loaded with information specific to the range or ranges to be detected, and each outputs respective J- and K-type information as a function of the applied J and K. The J- and K-type information is merged together and applied as an address to a third RAM whose output indicates which range, if any, the input value lies within. The output of the third RAM can be in either a bit-per-range format or a range-per-code format. The former is faster and accommodates arbitrary ranges, while the latter allows recognition of significantly more disjoint ranges at the expense of the extra time required for subsequent interpretation of the range code.