Regulated charge pump circuit
US8854119B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 2013 |
| Grant date | Oct 7, 2014 |
| Priority date | — |
| Expiry date | Jun 24, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/078
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit includes a charge pump, a first level shifter, a second level shifter, a voltage follower and a current mirror. The charge pump is configured to generate a voltage difference between the input node and the output node. The first level shifter is coupled to the charge pump output and configured to apply a first voltage variation to the charge pump output in response to a bias current. The second level shifter is coupled to the input node and configured to apply a second voltage variation to the charge pump input. The voltage follower is configured to equalize outputs from the first and second level shifters and provide a difference current which is multiplied by the current multiplier to generate a charging current applied to the charge pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.