Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific voltage responsive fault sensor
Reexamination Certificate
2005-06-28
2008-09-30
Sherry, Michael J (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific voltage responsive fault sensor
C326S081000
Reexamination Certificate
active
07430100
ABSTRACT:
A buffer circuit having enhanced overvoltage protection includes core buffer circuitry couplable to a first voltage source having a first voltage level. The core buffer circuitry is configured to receive a first signal and to generate a second signal which is a function of the first signal. The buffer circuit further includes a protection circuit coupled between the core buffer circuitry and a signal pad. The protection circuit is operative: (i) to clamp the first signal to about the first voltage level when a third signal received at the signal pad exceeds the first voltage level by a first amount; and (ii) to generate the first signal being substantially equal to the third signal when the third signal is less than or substantially equal to the first voltage level.
REFERENCES:
patent: 5416368 (1995-05-01), Sugibayashi
patent: 5629542 (1997-05-01), Sakamoto et al.
patent: 5880605 (1999-03-01), McManus
patent: 6031393 (2000-02-01), Wayner
patent: 6064231 (2000-05-01), Kothandaraman et al.
patent: 7098694 (2006-08-01), Bhattacharya et al.
patent: 05343977 (1993-12-01), None
Uezono, Yukinori, Level Conversion Circuit, Dec. 24, 1993, Fujitsu LSD, Abstract, p. 1.
Bhattacharya Dipankar
Kothandaraman Makeshwar
Kriz John C.
Morris Bernard L.
Agere Systems Inc.
Ieva Nicholas
Ryan & Mason & Lewis, LLP
Sherry Michael J
LandOfFree
Buffer circuit with enhanced overvoltage protection does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Buffer circuit with enhanced overvoltage protection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Buffer circuit with enhanced overvoltage protection will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3987006