Charge pump circuit
US8502576B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 23, 2011 |
| Grant date | Aug 6, 2013 |
| Priority date | — |
| Expiry date | Sep 23, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/07
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A charge pump circuit includes a charge generation circuit, a tracking circuit, a replica circuit, and a main charge pump. The main charge pump generates a charge current and a discharge current to a subsequent loop filter according to a UP signal and a DOWN signal. The replica circuit generates a first voltage in response to the current values of the first current source and the second current source of the main charge pump. The tracking circuit adjusts the current values of the first current source and the second current source of the main charge pump according to the first voltage and a second voltage, wherein the second voltage is in response to a voltage of an output node of the main charge pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.