P-channel negative pumps
US6621326B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 30, 2001 |
| Grant date | Sep 16, 2003 |
| Priority date | — |
| Expiry date | Aug 30, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/075
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A charge pump circuit is described. The charge pump circuit includes: a first pumping stage including a first switch and a second switch coupled to the first switch; and at least a second pumping stage coupled to the first pumping stage, where the second pumping stage includes a third switch and a fourth switch coupled to the third switch; where the first and second switches are in opposite states, further where immediately prior to the first switch transitioning from an off state to an on state, the second switch and the fourth switch are on. In one embodiment, the third and fourth switches are in opposite states, where immediately prior to the third switch transitioning from an off state to an on state, the second switch and the fourth switch are on.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.