Method and apparatus for mismatched shaping of an oversampled converter
US6577261B2 · kind B2 · utility
18Cited by
9References
40Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 12, 2001 |
| Grant date | Jun 10, 2003 |
| Priority date | — |
| Expiry date | Sep 12, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/502
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Methods and apparatuses for spectrally shaping mismatch errors in a multi-bit digital to analog converter (DAC). In an embodiment, a range signal is produced based on the digital input code. The range signal specifies which one of a plurality of ranges the digital input code is within. A density code is also produced, preferably, using a shuffling algorithm. The density code specifies a level within the range expressed by the range signal. The range signal and the density code are then combined to produce a plurality of sub-codes, a sum of the plurality of sub-codes equaling the digital input code.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.