Short circuits and power limit protection circuits
US9478978B1 · kind B1 · utility
0Cited by
8References
42Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 9, 2015 |
| Grant date | Oct 25, 2016 |
| Priority date | — |
| Expiry date | Jun 9, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/474
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method includes: detecting one of a short-to-ground condition and a short-to-supply condition at an output node; after a delay, selectively activating a feedback control transistor according to the detecting; detecting a first current passing through a first transistor using a second transistor sized to be smaller than the first transistor; mirroring the detected current using a plurality of transistors to form a feedback current; and providing the feedback current to a gate electrode of the first transistor according to the selectively activating the feedback control transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.