Method and apparatus for programming auto shut-off
US8116145B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 2008 |
| Grant date | Feb 14, 2012 |
| Priority date | — |
| Expiry date | Sep 8, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C16/28
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and system for enabling auto shut-off of programming of a non-volatile memory cell is disclosed. The system includes a memory array having a plurality of memory cells, each cell storing one bit of data. During the programming process, programming signals are applied to the target memory cells. A predefined period of time after the programming signals are applied, the auto shut-off system begins sensing an output signal from the memory cell. After the system detects an output signal from the memory cell, the system waits for a second predefined period of time before turning off the programming voltages. The system may be configured to sense an output voltage from the memory cell. The system then compares the output voltage to a reference voltage in order to detect when the cell is programmed. Alternatively, the system may sense an output current from the memory cell. The system then compares the output current to a reference current to detect when the cell is programmed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.