Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2011-06-07
2011-06-07
Berhane, Adolf (Department: 2838)
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
C323S276000
Reexamination Certificate
active
07956587
ABSTRACT:
A power supply apparatus that supplies an operating voltage to a microcomputer reliably resets the microcomputer before operation becomes unstable when an external power supply voltage decreases due to interruption. A switching regulator and series regulators are included. An externally supplied power supply voltage is stepped down to generate an intermediate voltage. The intermediate voltage is stepped down to generate an operating voltage for a microcomputer core. The intermediate voltage is stepped down to generate an operating voltage for an I/O port. When the intermediate voltage becomes lower than a reset determining voltage, the power supply apparatus outputs a reset signal to the microcomputer. When the power supply voltage decreases, the microcomputer can be reliably reset and the core can be prevented from operating erratically before the voltage becomes lower than a minimum core operating voltage.
REFERENCES:
patent: 4777626 (1988-10-01), Matsushita et al.
patent: 5968178 (1999-10-01), Williams et al.
patent: 6215287 (2001-04-01), Matsushiro et al.
patent: 6850047 (2005-02-01), Itabashi et al.
patent: 7038430 (2006-05-01), Itabashi et al.
patent: 7057378 (2006-06-01), Oyama et al.
patent: 7068485 (2006-06-01), Ishikawa et al.
patent: 7106031 (2006-09-01), Hayakawa et al.
patent: 7586296 (2009-09-01), Kanayama
patent: 2002/0129286 (2002-09-01), Kubota et al.
patent: 2002/0180497 (2002-12-01), Kim
patent: 0186832 (1986-07-01), None
patent: 62-006315 (1987-01-01), None
patent: 07-095765 (1995-04-01), None
patent: 08-063405 (1996-03-01), None
patent: 2000-222051 (2000-08-01), None
patent: 2002-024101 (2002-01-01), None
patent: 2002-158572 (2002-05-01), None
patent: 2004-153931 (2004-05-01), None
patent: 2005-188939 (2005-07-01), None
patent: 2005-303426 (2005-10-01), None
Japanese Office Action dated Mar. 17, 2009, issued in corresponding Japanese Application No. 2007-130765, with English translation.
Japanese Office Action dated Dec. 16, 2008 issued in corresponding Japanese Application No. 2007-130765, with English translation.
Extended European Search Report (10 pgs.) dated Dec. 21, 2010 issued in corresponding European Application No. 08009033.5-1245.
Itabashi Toru
Kawase Yoshiyuki
Berhane Adolf
Denso Corporation
Nixon & Vanderhye P.C.
LandOfFree
Power supply apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Power supply apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power supply apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2689209