Integrated circuit devices with power supply detection...

Details Integrated circuit devices with power supply detection... Integrated circuit devices with power supply detection...

2008-03-18

2008-03-18

Le, Don (Department: 2819)

Electronic digital logic circuitry

Interface

Supply voltage level shifting

C326S033000

Reexamination Certificate

active

11193006

ABSTRACT:
Integrated circuit devices are provided that include power detection circuits that indicate whether power supplies have reached functional voltage levels. The power detection circuits include latches coupled to power supplies that can detect whether all the power supplies have reached functional voltage levels, logic circuits to provide appropriate output signals, and well bias circuits that supply current to the power detection circuits. Well bias circuits provide current from first power supplies to reach functional voltage levels so that indication may be provided from the power detection circuit without requiring functional voltage levels of all power supplies. Outputs from power detection circuits can be combined with control signals, for various applications. Applications include holding an integrated circuit device in reset until power supplies have reached functional voltage levels.

REFERENCES:
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patent: 5345422 (1994-09-01), Redwine
patent: 5870342 (1999-02-01), Fukuda
patent: 6060873 (2000-05-01), Ternullo, Jr. et al.
patent: 6147511 (2000-11-01), Patel et al.
patent: 6593775 (2003-07-01), Yu et al.

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