AD converter and data processing unit
US7830286B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 2009 |
| Grant date | Nov 9, 2010 |
| Priority date | — |
| Expiry date | Jun 19, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/46
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An AD converter includes an input circuit, an operation circuit and a bus interface. The input circuit is provided with a pull-down circuit, which is capable of pulling down an analog signal input side of a sample-hold circuit whether an analog signal is inputted or not. The operation circuit is provided with a reference voltage conversion result storing register, which is capable of storing a conversion result of an analog reference voltage inputted periodically separately from a conversion result of the analog signal inputted through the sample-hold circuit. The operation circuit is further provided with a check register, which is capable of writing in and reading out data for checking operation of a signal transfer system including a bus interface through the bus interface. Thus, it is made possible to confirm normality of an external part and an internal part of the AD converter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.