Apparatus for calibrating a charge pump and method therefor
US6998891B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2004 |
| Grant date | Feb 14, 2006 |
| Priority date | — |
| Expiry date | Dec 14, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/18
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A signal calibration apparatus of a charge pump minimizes a current from the charge pump. The signal calibration apparatus includes a detecting circuit, a current adjusting circuit, and a calibrating circuit, wherein the detecting circuit is coupled to the charge pump for outputting a detecting signal according to the direction and magnitude of the current, the current adjusting circuit is coupled to the detecting circuit for outputting a calibrating signal according to the polarity and magnitude of the slew rate of the detecting signal; and the calibrating circuit, which consists of a first calibration current source and a second calibration current source, is respectively coupled to the charge pump and the current adjusting circuit for adjusting the first current and the second current by outputting a first calibrating current and second calibrating current to the charge pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.