Trigger circuit and method for improved transient immunity
US9438030B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 20, 2012 |
| Grant date | Sep 6, 2016 |
| Priority date | — |
| Expiry date | Apr 19, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/00315
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A trigger circuit detects a transient voltage increase on an integrated circuit. The trigger circuit controls a conductivity state of a clamping device to limit the transient voltage increase. The trigger circuit comprises a common capacitive element having a capacitive value, wherein a first time value and a second time value are dependent upon the capacitive value of the common capacitive element, the first time value applicable to an unpowered state of the integrated circuit and the second time value applicable to a powered state of the integrated circuit. The first time value and the second time value control a trigger circuit parameter which may include a detection range within which a rate of transient voltage increase causes the trigger circuit to become active or an “on” time upon which an active duration of control of the conductivity state of the clamping device depends.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.