Multi-stage charge pump circuit operating to simultaneously generate both a positive voltage and a negative voltage
US10333397B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 18, 2017 |
| Grant date | Jun 25, 2019 |
| Priority date | — |
| Expiry date | Jul 18, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/071
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A charge pump includes boosting circuits cascade coupled between first and second nodes, wherein each boosting circuit is operable in both a positive voltage boosting mode to positively boost voltage and a negative voltage boosting mode to negatively boost voltage. A first switching circuit selectively applies a first voltage to one of the cascaded boosting circuits in response to a first logic state of a periodic enable signal, with the cascaded boosting circuits operating in the positive voltage boosting mode to produce a high positive voltage at the second node. A second switching circuit selectively applies a second voltage to another of the cascaded boosting circuits in response to a second logic state of the periodic enable signal, with the cascaded boosting circuits operating in the negative voltage boosting mode to produce a high negative voltage at the first node. Simultaneous output of the positive and negative voltages is made.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.