Apparatus and method for enhanced transient blocking
US7342433B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 8, 2005 |
| Grant date | Mar 11, 2008 |
| Priority date | — |
| Expiry date | Nov 8, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H9/046
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for enhanced transient blocking employing a transient blocking unit (TBU) that uses at least one depletion mode n-channel device interconnected with at least one depletion mode p-channel device. The interconnection is performed such that a transient alters a bias voltage Vp of the p-channel device and a bias voltage Vn of the n-channel device such that the p- and n-channel devices mutually switch off to block the transient. The apparatus has an enhancer circuit for applying an enhancement bias to a gate terminal of at least one of the depletion mode n-channel devices of the TBU to reduce a total resistance Rtot of the apparatus. Alternatively, the apparatus has an enhancement mode NMOS transistor and a TBU connected thereto to help provide an enhancement bias to a gate terminal of the enhancement mode NMOS.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.