Multilevel analog to digital data converter having dynamic element matching in a reference data path
US6346898B1 · kind B1 · utility
45Cited by
3References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 7, 2000 |
| Grant date | Feb 12, 2002 |
| Priority date | — |
| Expiry date | Aug 7, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/458
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In a delta sigma analog to digital converter, generally comprising a noise shaping filter element fed into a multilevel quantizer, the output of which is the output of the delta sigma modulator and is also fed through a digital to analog converter array in a feedback loop to the noise shaping filter, dynamic element matching circuitry is included in the quantizer, in a reference path. The quantizer includes dynamic element matching circuitry for shaping the usage of the elements of the quantizer. Specifically, reference voltages are switched to specific comparators according to control signals from switch control circuitry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.