Sense circuit for storage devices such a non-volatile memories, with enhanced sensing discrimination
US5270590A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 12, 1991 |
| Grant date | Dec 14, 1993 |
| Priority date | — |
| Expiry date | Dec 12, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C7/14
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The sense circuit, for recognizing the virgin or programmed status of cells in storage devices, comprises a differential amplifier having a first input connected to a number of selectable matrix cells, through a first uncoupling circuit, a second input connected to a number of selectable reference virgin cells through a second uncoupling circuit, respective matrix and reference load transistors connected between each input of the amplifier and a supply voltage, and a current generator connected in parallel to the matrix cells and controlled by the first input of the amplifier to draw a current equal to a predetermined fraction of the current flowing through said first input.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.