High reliability content-addressable memory using shadow content-addressable memory
US6650561B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 2002 |
| Grant date | Nov 18, 2003 |
| Priority date | — |
| Expiry date | Feb 26, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C15/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A high-reliability content-addressable memory using a shadow content-addressable memory (CAM) array in parallel with a primary CAM array to increase the reliability of CAM searches. The reliability of CAM searches has been less than desired because of random environmental influences that corrupt data. The shadow CAM is written, read, and searched in parallel with the primary CAM. The search results from the parallel searches are compared and, if identical, are declared valid. If the search results are not equal, corrective action is initiated. The high-reliability content-addressable memory may be used with or without priority encoders.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.