发明授权
- 专利标题: Content addressable memory having reduced power consumption
- 专利标题(中): 内容可寻址存储器具有降低的功耗
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申请号: US10145018申请日: 2002-05-15
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公开(公告)号: US07216284B2公开(公告)日: 2007-05-08
- 发明人: Louis L. Hsu , Brian L. Ji , Li-Kong Wang
- 申请人: Louis L. Hsu , Brian L. Ji , Li-Kong Wang
- 申请人地址: US NY Armonk
- 专利权人: International Business Machines Corp.
- 当前专利权人: International Business Machines Corp.
- 当前专利权人地址: US NY Armonk
- 代理机构: Law Office of Charles W. Peterson, Jr.
- 代理商 Louis J. Percello, Esq.; Satheesh K. Karra, Esq.
- 主分类号: G11C29/00
- IPC分类号: G11C29/00
摘要:
A content addressable memory (CAM). A data portion of the CAM array includes word data storage. Each word line includes CAM cells (dynamic or static) in the data portion and a common word match line. An error correction (e.g., parity) portion of the CAM array contains error correction cells for each word line. Error correction cells at each word line are connected to an error correction match line. A match on an error correction match line enables precharging a corresponding data match line. Only data on word lines with a corresponding match on an error correction match line are included in a data compare. Precharge power is required only for a fraction (inversely exponentially proportional to the bit length of error correction employed) of the full array.
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