| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem such as the complication of a circuit or the increase of a delay time due to the increase of the number of matching. SOLUTION: Quick, low power, and small-scaled approach for the matching of a digital pattern provides the comparison of an input pattern 218 with a reference pattern 219 by each bit for judging coincidence. In an execution example, incoincidence turns each current source 207-209 into a connected state. When currents from the incoincidence are beyond the maximum value (Imax) of a current sink, a pattern incoincidence output 213 is increased. The reference pattern and the number of bits which must be coincident can be easily programmed. This approach is especially effective in 'fuzzy' matching in which N bits among an M bit pattern must be coincident for recognizing that the patterns are coincident. |
