Register driven means to control programming voltages
US6304487A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2000 |
| Grant date | Oct 16, 2001 |
| Priority date | — |
| Expiry date | Feb 28, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C16/3436
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A voltage control circuit that programs or erases memory cells comprises an internal voltage value store, a register device selectively coupled to an external voltage value source or the internal voltage value store to receive a voltage value, a voltage output circuit coupled to the register device to receive the voltage value and to output a corresponding voltage to the memory cells, and a verify circuit determining the time to successfully program or erase the memory cells. The register device allows the memory cells to be programmed or erased with voltage values designated by the external voltage value source to determine programming and erasing characteristics of the memory cells. Voltage values producing acceptable programming and erasing characteristics are saved in the internal voltage value store.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.