A/D converter including error correction for a local D/A converter
US5101205A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 24, 1991 |
| Grant date | Mar 31, 1992 |
| Priority date | — |
| Expiry date | Jan 24, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/458
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An A/D converter includes a subtracter for calculating a difference between an input signal and a feed-back signal, and outputting a differential signal, a local A/D converter for converting the differential signal into a first digital signal, a local D/A converter for converting the first digital signal into an analog signal, and outputting the analog signal, as a feedback signal, to the subtracter, an integrator inserted in a feedback loop constituted by the calculator, the local A/D converter, and the local D/A converter, a correcting circuit for correcting the first digital signal output from the local A/D converter so as to obtain a second digital signal corresponding to an analog signal output from the local D/A converter when the first digital signal is input thereto, and an output circuit for outputting the second digital signal, output from the correcting circuit, as an output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.