Abnormal circuit operation detection system
US7796050B2 · kind B2 · utility
1Cited by
12References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2005 |
| Grant date | Sep 14, 2010 |
| Priority date | — |
| Expiry date | May 30, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/3004
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An abnormality in operation is detected by meticulously monitoring the operation of a monitored device that comprises a state machine. The state number, indicating the state the monitored device is currently in, is output from the device. The upper and lower limit values of current consumption is set for each state number. A monitoring circuit, using the upper and lower limit values for the present state number, judges the value of current consumption detected by a current detection circuit and detects whether there is abnormality in operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.