Charge pump circuit
US7511560B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 2007 |
| Grant date | Mar 31, 2009 |
| Priority date | — |
| Expiry date | Jun 12, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/07
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A charge pump circuit including a plurality of switches and a switch control circuit is provided. The charge pump circuit is suitable for a display panel. The switches switch from “off” state to “on” state in an enable transition, and switch from “on” state to “off” state in a disable transition. The switch control circuit is coupled to the switches for controlling the on/off states of the switches and allowing the charge pump circuit to provide an output voltage that is different from an input voltage. The switch control circuit prolongs the time required for enable transition of the switches to be longer than the time for disable transition thereof. The equivalent impedances of the switches change from high values to low values when the switches are at the enable transition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.