VPP power supply having a regulator circuit for controlling a regulated positive potential
US5291446A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 1992 |
| Grant date | Mar 1, 1994 |
| Priority date | — |
| Expiry date | Oct 22, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/145
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A positive power supply for generating and supplying a regulated positive potential to control gates of selected memory cells via word lines in an array of flash EEPROM memory cells during programming includes a clock circuit (18b) for generating a pair of non-overlapping clock signals and charge pump means (18c) responsive to an external power supply potential (VCC) and to the non-overlapping clock signals for generating a high positive voltage. A regulator circuit (20) responsive to the high positive voltage and a reference voltage is provided for controlling the regulated positive potential so that it is independent of the external power supply potential (VCC).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.