Sigma-delta modulator and analog-to-digital converter
US9350380B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 28, 2013 |
| Grant date | May 24, 2016 |
| Priority date | — |
| Expiry date | Feb 28, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/438
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A Sigma-Delta modulator and an analog-to-digital converter. The Sigma-Delta modulator comprises a quantizer, a correction module and an RC integrator. The correction module comprises a predetermined resistance through which a correction level is generated. The correction module is used to compare the correction level with a predetermined reference voltage by using a comparator in the quantizer, so as to generate a digital correction signal, based on which the resistance in a resistance correction array in the RC integrator is corrected. The predetermined resistance is of the same type as the resistance in the resistance correction array in the RC integrator. The Sigma-Delta modulator and the analog-to-digital converter can correct the resistance deviation in the RC integrator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.