Digital calibration method and apparatus for multi-bit delta-sigma D/A converter
US6229466A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 23, 1999 |
| Grant date | May 8, 2001 |
| Priority date | — |
| Expiry date | Aug 23, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/50
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A system and method for calibrating a multi-bit feedback quantizer in a delta-sigma modulation system. A digital data pattern corresponding to a particular DAC code of a multi-bit digital-to-analog converter is transmitted in the transmit channel, where the DAC code is proportional to an analog voltage signal. An effective DC component of the digital data pattern is realized and converted to corresponding digital DC component values. A predetermined number of samples of the digital DC component values are averaged to provide an average sample value. A digital code in the multi-bit feedback quantizer is replaced with the average sample value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.