Low voltage charge pump
US7446596B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 2007 |
| Grant date | Nov 4, 2008 |
| Priority date | — |
| Expiry date | May 25, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/075
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A single pump stage of a multi-stage charge pump couples a first low-voltage NMOS transistor in series with a first low-voltage PMOS transistor between charge transfer capacitors. A second low-voltage NMOS transistor is coupled between the gate and the source of the first NMOS transistor. A second low-voltage PMOS transistor is coupled between the gate and the source of the first PMOS transistor. Respective boost voltages are applied to gates of the first NMOS transistor and the second PMOS transistor to minimize threshold voltage losses. A stabilizing capacitor is connected between the first NMOS transistor and the second PMOS transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.