Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2005-11-15
2005-11-15
Laxton, Gary L. (Department: 2838)
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
C323S276000, C323S281000, C323S901000
Reexamination Certificate
active
06965223
ABSTRACT:
A circuit and method for enabling a rapid adjustment of a reference voltage during a disable period such as a fault condition, shutdown condition, and the like, of a voltage regulator is described. A soft start circuit that is arranged to couple a reference voltage input of an error amplifier to a portion of an output voltage avoiding high current surges and optimizing start up time is modified to include a low resistance switch that provides a path for a reference node capacitance to rapidly discharge. The faster discharge may allow the reference voltage to match the output voltage even when the switch is activated for a very brief interval. This in return allows the output voltage to start up in a controlled manner after a disable period.
REFERENCES:
patent: 5939870 (1999-08-01), Nguyen et al.
patent: 6091234 (2000-07-01), Kitagawa
patent: 6100677 (2000-08-01), Farrenkopf
patent: 6377480 (2002-04-01), Sase et al.
patent: 6525517 (2003-02-01), Hojo et al.
patent: 6617834 (2003-09-01), Tran
patent: 6674272 (2004-01-01), Hwang
patent: 2004/0080886 (2004-04-01), Ishikawa et al.
Dunlap, III Glenn Chance
Klumpp Thatcher
MacLean William
Branch John W.
Darby & Darby P.C.
Laxton Gary L.
National Semiconductor Corporation
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