Coding techniques for improving the sense margin in content addressable memories
US7881089B2 · kind B2 · utility
7Cited by
3References
25Claims
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Key dates
| Filing date | Feb 24, 2009 |
| Grant date | Feb 1, 2011 |
| Priority date | — |
| Expiry date | Jul 31, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C13/0004
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A content addressable memory using encoded data words and search words, and techniques for operating such device. In one embodiment, the data word is transformed into a code word guaranteeing a mismatch of at least two code word bits of different binary values during the memory search operation when the data word does not match a search word. In another embodiment, the search word is transformed into a search code such that the Hamming distance between the code word and the search code is greater than a given threshold when there is a mismatch of at least one bit between the data word and the search word.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.