Low power charge pump regulating circuit
US6566847B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 2002 |
| Grant date | May 20, 2003 |
| Priority date | — |
| Expiry date | Jul 29, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/46
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A charge pump voltage regulating circuit which uses a constant current generator and a second current generator, controlled by the output voltage of the charge pump circuit. The current from the constant current generator is divided between the input to a current controlled oscillator and the second current generator. When the output voltage of the charge pump circuit increases the current in the second current generator increases, the current flowing into the current controlled oscillator decreases, the frequency of the clock signals supplied to the charge pump circuit decreases, and the output voltage of the charge pump circuit decreases. When the output voltage of the charge pump circuit decreases the current in the second current generator decreases, the current flowing into the current controlled oscillator increases, the frequency of the clock signals supplied to the charge pump circuit increases, and the output voltage of the charge pump circuit increases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.