Multi-stage charge pump
US6486728B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 16, 2001 |
| Grant date | Nov 26, 2002 |
| Priority date | — |
| Expiry date | Mar 16, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0041
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An integrated voltage source includes a charge pump having multiple charge pump stages connected in series. A first one of the these charge pump stages is connected to the high voltage output of the charge pump, and the remaining charge pump stages are coupled to this first charge pump stage in a manner such that substantially all the charge pumped by all of the additional charge pump stages is also pumped by the first charge pump stage. In one mode of operation, the first charge pump stage and at least one additional charge pump stage are enabled. In another mode of operation, the first charge pump stage and at least two additional charge pump stages are enabled. A control circuit determines the mode of operation and, therefore, the number of charge pump stages that are enabled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.