Programming pulse ramp control circuit
US5687116A · kind A · utility
27Cited by
5References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 9, 1996 |
| Grant date | Nov 11, 1997 |
| Priority date | — |
| Expiry date | Oct 9, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C16/12
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A pulse ramp control circuit allows for the program voltage applied to the control gate of a memory cell to be ramped from a low voltage to a high voltage in a precise manner. The ramp rate of this program voltage is primarily determined by a single capacitor and the bias current provided thereto. By providing a ramped program voltage to the memory array during programming operations, present embodiments effectively cover the entire distribution of program voltage v. program current for the memory cells to be programmed, thereby minimizing over-program and under-program conditions without reducing program time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.