Supply voltage detection circuit

Details Supply voltage detection circuit Supply voltage detection circuit

2006-10-10

2006-10-10

Le, Don P. (Department: 2819)

Electronic digital logic circuitry

Interface

Current driving

C326S038000

Reexamination Certificate

active

07119579

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.

REFERENCES:
patent: 5889664 (1999-03-01), Oh
patent: 6563746 (2003-05-01), Fujioka et al.
patent: 6760262 (2004-07-01), Haeberli et al.

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