Capacitive regulation of charge pumps without refresh operation interruption
US9077238B2 · kind B2 · utility
2Cited by
179References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 25, 2013 |
| Grant date | Jul 7, 2015 |
| Priority date | — |
| Expiry date | Feb 27, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0003
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a charge pump system using a capacitive voltage divider, or other feedback circuit requiring periodic refreshing, in order to refresh the circuit, system operations would typically need to be suspended in order to refresh the capacitors if charge leakage begins to affect the output level. This can lead to delay and power inefficiencies. To overcome this, two feedback circuits are used so that while one is active, the other can have its capacitors' state refreshed. By alternating the two networks, delay can be avoided and power use reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.