Technique restore for a dynamic random access memory
US4710902A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 1985 |
| Grant date | Dec 1, 1987 |
| Priority date | — |
| Expiry date | Oct 4, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C11/4091
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Memory cells in a dynamic random access memory are coupled to bit lines which are coupled to sense amplifiers. Memory cells are enabled by an enabled word line which causes the memory cells to output data onto the bit lines to which they are coupled. A selected bit line is coupled to a data line while the sense amplifier is amplifying the signal provided by the memory cell. The effect of coupling the bit line to the data line is to hinder the refresh of the selected memory cell because the bit line does not reach full power supply voltage due to the loading by the data line. Full refresh is obtained by keeping the word line enabled for a predetermined time following the bit line being decoupled from the data line so the sense amplifier can bring the bit line to full power supply potential.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.