Delta-sigma A/D converter
US5940019A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 31, 1997 |
| Grant date | Aug 17, 1999 |
| Priority date | — |
| Expiry date | Dec 31, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/454
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A delta-sigma A/D converter has a delta-sigma modulator that converts an analog signal input thereto into a 1-bit digital bit stream by a delta-sigma modulation wherein the difference between the analog signal and a feedback reference voltage is integrated and quantized, the feedback reference voltage being set to a value greater than a specified maximum level of the analog signal. A data converter is connected to an output of the delta-sigma modulator and converts the 1-bit digital bit stream from the delta-sigma modulator into a multi-bit digital bit stream, using a predetermined conversion value. A decimation filter is connected to an output of the data converter and extracts low frequency components corresponding to the analog signal, contained in the multi-bit digital bit stream from the data converter and outputs multi-bit digital data representative of the analog signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.