Arrangement for reading out an analogue voltage signal with self-calibration
US9000961B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2013 |
| Grant date | Apr 7, 2015 |
| Priority date | — |
| Expiry date | Nov 20, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/43
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An arrangement for reading out an analog voltage input signal includes an input applying the input signal thereto, and a reference unit generating an analog reference voltage. To perform online self-calibration, the arrangement includes a superposition unit generating a combined analog signal by superimposing the analog reference voltage onto the input signal, a converting unit converting the combined analog signal into a one-bit serial data stream at a conversion sampling rate, and a decomposition unit, which includes at least two digital filters configured to generate from the serial data stream two corresponding digital signals at different data rates, which can be less than the conversion sampling rate. Two data processing units calculate from the corresponding digital signal a digital input voltage representing the input signal and a digital reference voltage representing the analog reference voltage or a disturbance voltage signal representing parasitic voltage components introduced by the superposition unit, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.