Electro-static discharge clamp (ESD) for NxVDD power rail
US8760828B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 8, 2012 |
| Grant date | Jun 24, 2014 |
| Priority date | — |
| Expiry date | Aug 11, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H9/046
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit with an electro-static discharge clamp coupled to a first power source and second power source. The electro-static discharge clamp includes an NMOS stack and an electro-static discharge detector. The NMOS stack has a first NMOS transistor with gate node ng1 and a second NMOS transistor with gate node ng2. The electro-static discharge detector is configured to control the NMOS stack, and may include three switches. A first switch is configured to switch the gate node ng1 to the second power source. A second switch is configured to switch the gate node ng1 to the gate node ng2. A third switch is configured to switch the gate node ng1 to the ground.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.