Analog to digital converting device
US4227183A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 16, 1977 |
| Grant date | Oct 7, 1980 |
| Priority date | — |
| Expiry date | Dec 16, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/145
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In an analog to digital converting device having plural converting stages provided for converting an analog signal to a multi-bit digital signal, the lowest or just preceding converting stages, wherein analog signals to be converted are quantized by minute steps and can be regarded as similar to Gaussian noises, are arranged to form equivalent digital signals. The analog signals are compared with reference levels based on the average level of the analog signals, for instance, alternating components of analog signals are compared with a zero level, hereby improving accuracy of the conversion by minimizing the effect of DC and gain drift.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.