Delay circuit with reset feature
US8464078B2 · kind B2 · utility
4Cited by
10References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 22, 2008 |
| Grant date | Jun 11, 2013 |
| Priority date | — |
| Expiry date | Nov 24, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/26
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system comprises an AC/DC adapter having a connector. The system also comprises a portable computer that receives said connector. The portable computer comprising a delay circuit coupled to a power transistor that is coupled in parallel with a resistor. The delay circuit causes the power transistor to activate following a time delay after current from the adapter begins to flow through the resistor. As a result of a user beginning to remove the connector from the portable computer, a control transistor is activated to reset the delay circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.