Apparatus for maintaining non-volatility in ferroelectric ramdom access memory and method therefor
US5892705A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 30, 1997 |
| Grant date | Apr 6, 1999 |
| Priority date | — |
| Expiry date | Apr 30, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C11/22
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for maintaining non-volatility in a ferroelectric random access memory (FRAM), in which recorded information is maintained during a power failure, are provided. The apparatus for maintaining non-volatility includes a control portion for a writeback function, a power source voltage sensing portion for sensing a failure in the power source voltage and providing a power failure signal to the control portion such that the control portion completes a writeback cycle before power failure. The power source voltage sensing portion generates a control signal by sensing a failure in power source voltage, and provides a power failure signal to the control portion such that a writeback process is completed before power failure, thereby maintaining non-volatility in the memory device. That is, loss of non-volatility in the memory device occurring during a power failure can be prevented by increasing the reliability of products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.