Electricity: electrical systems and devices – Safety and protection of systems and devices – Voltage regulator protective circuits
Reexamination Certificate
2006-04-17
2009-06-09
Riley, Shawn (Department: 2838)
Electricity: electrical systems and devices
Safety and protection of systems and devices
Voltage regulator protective circuits
C361S093300
Reexamination Certificate
active
07545610
ABSTRACT:
A constant-voltage power supply circuit for converting an input voltage applied to an input terminal into a predetermined constant voltage for output from an output terminal includes an output transistor to supply from the input terminal to the output terminal an output current responsive to an applied control signal, an error amplifying circuit unit to receive a predetermined bias current to control an operation of the output transistor, and a bias current adjusting circuit unit to supply the error amplifying circuit unit with the bias current responsive to the output current output from the output transistor, wherein the bias current adjusting circuit unit is configured to suspend the supply of the bias current to the error amplifying circuit unit in response to lowering of the output voltage to a predetermined voltage.
REFERENCES:
patent: 6509723 (2003-01-01), Matsushita
patent: 6816392 (2004-11-01), Takamatsu
patent: 7015680 (2006-03-01), Moraveji et al.
patent: 7233462 (2007-06-01), Kanakubo
patent: 2002/0158679 (2002-10-01), Matsuo
patent: 2005/0036246 (2005-02-01), Nagata et al.
patent: 3-158912 (1991-07-01), None
patent: 2000-66745 (2000-03-01), None
patent: 2001-75663 (2001-03-01), None
Dickstein & Shapiro LLP
Ricoh & Company, Ltd.
Riley Shawn
LandOfFree
Constant-voltage power supply circuit with fold-back-type... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Constant-voltage power supply circuit with fold-back-type..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Constant-voltage power supply circuit with fold-back-type... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4083139