Charge pump
US7746676B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 2007 |
| Grant date | Jun 29, 2010 |
| Priority date | — |
| Expiry date | Aug 22, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0045
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A charge pump includes a first capacitor, a first switch with adjustable on-state resistance, a second switch, a third switch, a fourth switch, a feedback loop, and an oscillator. The first switch is coupled between a first electrode of the first capacitor and an output node. The second switch is coupled between a second electrode of the capacitor and ground. The third switch is coupled between an input node and the second electrode of the capacitor. The fourth switch with adjustable on-state resistance is coupled between the input node and the first electrode of the capacitor. The feedback loop monitors a regulated voltage of the output node and generates a control signal to regulate resistances of the first, fourth switches. The oscillator generates a first and second pulse signals to switch the open and close states of the first, third switches and the second, fourth switches, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.