Column redundancy for content addressable memory
US6665220B2 · kind B2 · utility
18Cited by
8References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 18, 2002 |
| Grant date | Dec 16, 2003 |
| Priority date | — |
| Expiry date | Jun 18, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C15/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system for adding redundancy to the data path of a content addressable memory array is disclosed herein. The disclosed system employs an array of memory elements, supplemented by an array of redundant memory elements, with a switching system and a redundancy control system to ensure that defective memory elements are not accessed. Additionally a pull down unit is employed on the search lines of non-operative memory elements to ensure that inaccurate search results are not reported.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.