Memory using conventional cells to perform a ram or an associative memory function
US4740917A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1985 |
| Grant date | Apr 26, 1988 |
| Priority date | — |
| Expiry date | Nov 12, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C15/04
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Memory comprising a matrix of conventional Harper pnp cells and peripheral circuits which allows it to be used either as a random access memory or as an associative memory. In addition to the read/write circuits which are inhibited in search mode, it comprises search mode control circuits 7-1 to 7-m to provide the memory cells with a search argument DI-1 to DI-m and search circuits 11-1 to 11-n connected to the word lines for detecting the match or mismatch conditions. A search restore circuit 15 common to all word lines WL is used to restore the work lines to a quiescent voltage once the search operation is completed. Circuits 7 and 11 are inhibited in read/write mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.