Overvoltage protection circuit with reduced sensitivity to process variations
US8004807B2 · kind B2 · utility
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3References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2008 |
| Grant date | Aug 23, 2011 |
| Priority date | — |
| Expiry date | Jul 30, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H9/046
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An overvoltage protection circuit includes a shunt circuit adapted for connection to at least one circuit node to be protected from an overvoltage condition and a voltage generator coupled to the shunt circuit. The shunt circuit is selectively activated as a function of a control signal supplied to the shunt circuit. The voltage generator is operative to generate the control signal for activating the shunt circuit during the overvoltage condition. The control signal has a level which varies in a manner that at least partially changes offsets in activation threshold of the shunt circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.