CAM, DUMMY COINCIDENCE LINE CHAIN USED IN CAM, CORE CELL

摘要

PROBLEM TO BE SOLVED: To achieve two-dimensional decoding being necessary to achieve a reasonable array aspect ratio for a large capacity content reference memory. SOLUTION: Two-dimensional decoding is achieved by having multiple matching lines per physical row. These match lines are physically routed on top of the array core cell in an upper metal layer. In order to limit power consumption in the resulting large-capacity content reference memory, the matching function is implemented by two or more NAND chains per word. Means for achieving the pre-charging and evaluation of these chains, and for implementing dummy chains for the provision of timing information are also disclosed. COPYRIGHT: (C)2009,JPO&INPIT