System of DAC correction for a &Dgr;&Sgr; modulator
US6522276B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 2001 |
| Grant date | Feb 18, 2003 |
| Priority date | — |
| Expiry date | Jun 20, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/424
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A &Dgr;&Sgr; modulator including a corrector unit for measuring an error due to differences in the operating parameters of individual components of an internal D/A converter, the corrector unit applying a correction of the error measured in this way to a digital signal, the modulator being characterized in that the internal D/A converter includes a number of individual components greater than the number necessary for internal conversion, and in that the corrector unit is suitable for extracting from the internal conversion process, in alternation, on each occasion a different component from the various individual components in order to measure the operating parameter error of the extracted component, while leaving a number of components in action that is sufficient for internal conversion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.