Voltage supply circuit

Details Voltage supply circuit Voltage supply circuit

2007-11-06

2010-12-21

Han, Jessica (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C323S281000, C361S093900

Reexamination Certificate

active

07855537

ABSTRACT:
A voltage supply circuit includes an output transistor causing a first current to flow to an output terminal of the voltage supply circuit based on a control voltage applied from an error amplifier to a control terminal of the output transistor; and an overcurrent protection circuit including a reference transistor causing a second current to flow to the output terminal, the second current having an amount corresponding to an amount of the first current, the overcurrent protection circuit regulating a level of the control voltage based on comparison between a detection voltage caused based on the second current and a reference voltage.

REFERENCES:
patent: 5739712 (1998-04-01), Fujii
patent: 7012791 (2006-03-01), Kikuchi
patent: 7015680 (2006-03-01), Moraveji et al.
patent: 7573689 (2009-08-01), Hojo
patent: 2007/0188958 (2007-08-01), Sase et al.
patent: 2000-133721 (2000-05-01), None
patent: 2002-304225 (2002-10-01), None
patent: 2003-186555 (2003-07-01), None
patent: 2005-293067 (2005-10-01), None
Chinese Office Action dated Aug. 4, 2010, with English translation.

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