Content addressable memory

Details Content addressable memory Content addressable memory

H - Electricity

01

L

H01L 21/8239 (2006.01) G11C 15/04 (2006.01) H01L 27/02 (2006.01) H01L 27/105 (2006.01) H01L 21/822 (2006.01) H01L 27/06 (2006.01)

Patent

CA 2665036

A content addressable memory (CAM) is disclosed. The CAM has first and second CAM cells (710, 720, 730, 740) in which each adjacent CAM cell is rotated 180 relative to its neighbor, which provides a compact physical arrangement having overall matched CAM array cell and RAM array cell row heights. Further, an interleaved set scheme can be applied to the CAM cells to provide reduced routing of compare signals and reduced parasitic capacitance. The first and second CAM cells may be vertically stacked.

L'invention concerne une mémoire adressable par le contenu (CAM). La CAM présente des première et seconde cellules CAM, chaque cellule CAM adjacente étant entraînée en rotation sur 180° relativement à sa voisine, ce qui donne un agencement physique compact présentant des hauteurs de rangées de cellules de matrice CAM et de matrice RAM. En outre, un système d'ensembles entrelacés peut être appliqué aux cellules CAM pour assurer un acheminement réduit de signaux de comparaison et une capacité parasite réduite.

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