Apparatus for detecting A/D converter abnormality
US7009537B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 7, 2004 |
| Grant date | Mar 7, 2006 |
| Priority date | — |
| Expiry date | Dec 7, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/12
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An apparatus for detecting an abnormality in an A/D converter has a voltage accumulating capacitor. The apparatus includes a storage circuit which receives analog signals whose range of signal operation voltage when normal is limited to be narrower than the range of input operation voltages, and stores in advance the range of abnormal voltages of digital signals converted by the A/D converter, and determines the A/D converter to be abnormal when the digital signal voltage lies in the range of abnormal voltages. The A/D converter converts the analog signal voltage into a digital signal voltage, and then initializes the analog signal voltage of the capacitor to a voltage in the abnormal voltage range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.