Variable stage charge pump and method for providing boosted output voltage
US7956673B2 · kind B2 · utility
36Cited by
2References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 11, 2008 |
| Grant date | Jun 7, 2011 |
| Priority date | — |
| Expiry date | Sep 15, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/07
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An embodiment of a variable stage charge pump includes a plurality of pump stages. Each stage is configured to generate an intermediate boosted output voltage. A pump stage selector selects the number of charge pump stages to be coupled between an input and output terminal of the variable stage charge pump. The pump stage selector may control a plurality of switches to select the number of stages. For example, two stages may be coupled in parallel and the parallel combination coupled in series to a third stage, resulting in a two stage charge pump. For a three stage charge pump, all three stages are coupled in series.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.