Technique for improving the resolution of an A/D converter
US4958308A · kind A · utility
2Cited by
1References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 21, 1988 |
| Grant date | Sep 18, 1990 |
| Priority date | — |
| Expiry date | Oct 21, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/201
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present invention provides a technique for improving the resolution of an A/D converter. The input analog signal is sampled to generate an analog level and the analog level is held for an interval. A random noise signal having zero average value is superimposed on the held level to generate a fluctuating voltage. This fluctuating voltage is then sampled a plurality of at least N times, and N sampled values are communicated to the A/D converter so that N digitized values are generated. These digitized values are averaged to provide an output having a digitization error reduced by a factor of N.sup.1/2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.