Method and apparatus for RC triggered electrostatic discharge power clamp with hysteresis
US7372679B1 · kind B1 · utility
9Cited by
8References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 18, 2004 |
| Grant date | May 13, 2008 |
| Priority date | — |
| Expiry date | Jun 15, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D89/819
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An Electrostatic Discharge (ESD) protection device extends the protection range of an ESD clamp circuit through hysteresis of the associated ESD clamp control circuit. Once the ESD clamp circuit is activated, an adjustment circuit applies a trigger level adjustment signal to the ESD clamp control circuit. The trigger level adjustment signal effectively increases the magnitude of the deactivation signal that is required to deactivate the ESD clamp circuit. Since the deactivation signal increases over time, a longer activation time of the ESD protection device is provided, which allows an extended protection range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.