Content addressable memory of a simple construction capable of retrieving a variable word length data
US5787458A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 3, 1996 |
| Grant date | Jul 28, 1998 |
| Priority date | — |
| Expiry date | Sep 3, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C15/04
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A content addressable memory system includes one retrieval sense amplifier provided in common with a plurality of memory words. A logic operation between a result of retrieval outputted from the sense amplifier and the result of a preceding retrieval stored in a one-bit working register provided for the same sense amplifier is carried out by a control gate also provided for the same sense amplifier, and the result of the logic operation is stored back in the same working register. A plurality of working registers may be provided for each control gate and sense amplifier. The content addressable memory system can retrieve a variable word length data and can be realized with a reduced circuit area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.