Efficiency improvement in charge pump system for low power application
US7898319B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2004 |
| Grant date | Mar 1, 2011 |
| Priority date | — |
| Expiry date | Dec 6, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/073
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method and apparatus are provided for improving the efficiency in charge pump systems for low power applications. This first embodiment provides a method and apparatus which defines a charge pump output voltage high target which turns off a charge pump enable signal and a charge pump outlet voltage low target which turns on a charge pump enable signal. A second embodiment defines a protection time where the charge pumping continues until a predefined phase is completed and the leakage paths are disabled. A third embodiment defines a phase memory block, which continues or remembers the phase until the next request for charge pumping. This prevents the circuitry from entering a window where charge leakage, which diminishes charge pumping efficiency, could occur.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.