Self-adaptive multi-stage charge pump
US7969235B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 30, 2009 |
| Grant date | Jun 28, 2011 |
| Priority date | — |
| Expiry date | Sep 30, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/073
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A charge pump circuit for generating an output voltage is described. The charge pump includes multiple output generation stages connected in series and a corresponding set of multiple gate stages connected in series, where the output stages have the same structure as the corresponding gate stages. The switches that the provide the output of each output generation stage are controlled by the corresponding gate stage. The number of output stages that are active in boosting the voltage self-adapts according to the output level being regulated, with the later stages changing from a boosting operation to a filtering function with not being used to active boost the output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.