Mismatch-shaping dynamic element matching systems and methods for multi-bit sigma-delta data converters
US7576671B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2007 |
| Grant date | Aug 18, 2009 |
| Priority date | — |
| Expiry date | Feb 27, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M7/3026
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A sigma delta modulator (SDM) data converter system is provided. The SDM data converter system comprises a signal path, a feedback signal path, and a multi-bit quantizer disposed in a feedforward path. The signal path receives an input signal to be processed. The feedback signal path provides a feedback signal that is subtracted from the input signal. The multi-bit quantizer is disposed in the feedforward path so as to receive the input signal after the feedback signal has been subtracted from it. Te multi-bit quantizer uses feedforward dynamic element matching (DEM) to spectrally shape mismatch errors in the SDM data conversion system and produce an output signal, wherein the output signal of the multi-bit quantizer is used for at least a portion of the feedback signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.