Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2008-10-10
2011-12-27
Zhang, Jue (Department: 2838)
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
C323S272000
Reexamination Certificate
active
08085013
ABSTRACT:
A DC converter and a mode-switching method used in an electronic apparatus are included. The electronic apparatus includes a subsystem circuit. The DC power converter comprises a first voltage converting circuit electrically connected to the subsystem circuit, receiving a system voltage and a first reference voltage, and converting the system voltage to a first output voltage based on the first reference voltage; and a second voltage converting circuit electrically connected to the subsystem circuit and receiving the system voltage and a second reference voltage, and converting the system voltage to a second output voltage to the same output end of the first voltage converting circuit based on the second reference voltage; wherein the second voltage converting circuit outputs the second output voltage to the subsystem circuit when the first output voltage at the output end is smaller than a threshold.
REFERENCES:
patent: 5838076 (1998-11-01), Zarrabian et al.
patent: 2002/0121883 (2002-09-01), Bartenschlager et al.
patent: 2005/0189931 (2005-09-01), Ishino
patent: 2006/0164050 (2006-07-01), Hasegawa et al.
Chen Kuan-Yeu
Lin Song-Yi
Wang Hung I
Wei Chun Kai Derrick
King Justin
MStar Semiconductor Inc.
WPAT, PC
Zhang Jue
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