Area efficient stacked TCAM cell for fully parallel search

Details Area efficient stacked TCAM cell for fully parallel search Area efficient stacked TCAM cell for fully parallel search

2007-08-21

2007-08-21

Nguyen, Tan T. (Department: 2827)

Static information storage and retrieval

Interconnection arrangements

Transistors or diodes

C365S049130, C365S168000

Reexamination Certificate

active

11367650

ABSTRACT:
An area efficient stacked TCAM cell for fully parallel search. The TCAM cell includes a top half circuit portion interconnected with a replicated bottom half circuit portion such that there is a shared match line between each of the half circuit portions. Each TCAM cell includes a pair of memory elements that is connected to a pair of associated compare circuits such that the interconnections between the memory elements and the compare circuits are substantially vertical in active MOS layers and substantially horizontal in metal layers. The memory elements and the compare circuits are connected such that they facilitate shorter interconnections and sharing of terminals at the boundary of adjacent cells. The resulting stacked TCAM cell provides shorter match lines, shared bit lines, and reduced silicon area to facilitate improved routing and performance.

REFERENCES:
patent: 7112831 (2006-09-01), Kim et al.
patent: 7170769 (2007-01-01), Sachan et al.

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