Variable frequency charge pump
US9264053B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 1, 2013 |
| Grant date | Feb 16, 2016 |
| Priority date | — |
| Expiry date | Jul 1, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A charge pump circuit that utilizes a sensing circuit for determining the current loading or status of the output supply generated by the charge pump circuit to determine a corresponding frequency for a variable rate clock for the charge pump circuit. When a current load is present, the clock frequency automatically ramps up to a relatively high level to increase the output current of the charge pump circuit. When the current load is removed and the supply is settled out, the clock frequency is automatically reduced to a relatively quieter level and the charge pump circuitry operates at a lower power level. Accordingly, the charge pump circuit is only noisy when it has to be, thus providing optimal power when required and being electrically quiet and operating at lower power at all other times.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.