Intelligent watchdog circuit
US7475295B2 · kind B2 · utility
1Cited by
17References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 28, 2005 |
| Grant date | Jan 6, 2009 |
| Priority date | — |
| Expiry date | Feb 17, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/0757
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A simple, but intelligent watchdog circuit uses an up/down counter for its delay element. A watchdog event will occur if the counter is allowed to over flow or under flow its boundaries (in either direction). The system objective is to keep the counter within its boundaries by controlling the direction of the count. The count direction is simply a function of the Most Significant Bit (MSB) of the counter. Thus, the system must simply monitor the counters MSB and perform a little intelligent to determine the desired count direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.