Supply voltage detection circuit
US6630844B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2001 |
| Grant date | Oct 7, 2003 |
| Priority date | — |
| Expiry date | Feb 20, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R19/155
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A supply voltage detection circuit determines when the voltage for any one of the power supply signals received by an integrated circuit device is below its steady state level, as may occur during a hot socket condition when the device is inserted in or removed from a powered-on system. A first detection circuit determines when the first supply voltage level is below its steady state level, and a second detection circuit determines when the second supply voltage level is below its steady state level. A logic circuit provides a detected condition signal that disables current flow through an input/output terminal associated with the supply voltage detection circuit. The circuit is able to rapidly detect hot socket conditions for a wide range of power supply signal; levels, including low supply signal levels, while limiting leakage current effects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.