Multi-stage analog-to-digital converting device
US4973974A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 7, 1988 |
| Grant date | Nov 27, 1990 |
| Priority date | — |
| Expiry date | Sep 7, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/164
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An A/D converting device includes an A/D converting section having a plurality of A/D converters arranged in multi-stages. The device further has a reference data generator, a correction value memory and a controller. The data generator sequentially generates pairs of a plurality of reference analog values and reference digital values. The memory is accessed using the digital output of the first stage A/D converter. The controller has a correction mode and an application mode. In the correction mode, the controller executes such a control as to supply the reference analog values to the A/D converting section and write into the memory a difference between an digital output value of a succeeding stage A/D converter and the reference digital values corresponding to the digital output value. In the application mode, the controller executes such a control as to read out a corrected digital value from the memory in accordance with the digital output value of the first stage A/D converter, and supply the corrected digital value, in place of value actually acquired from a preceding stage A/D converter, to the A/D converting section to be synthesized with the digital output value of the suc…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.