| 摘要 |
A system for comparing the ratio of two digital numbers to a threshold, the bits of each number are compared in groups comprising less than the total number of bits. The most significant group of bits are first compared by means of a programmable read-only memory (10), and if they contain sufficient information to make the comparison, the result thereof is indicated. If the most significant group of bits does not contain sufficient information or merely yields an indication which is probable but not certain, a comparison or verification is made by means of a PROM (14), based upon the next higher order group of bits that does contain sufficient information. |
