Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2007-08-28
2007-08-28
Vu, Bao Q. (Department: 2838)
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
C323S222000, C323S274000
Reexamination Certificate
active
10981792
ABSTRACT:
A control circuit for suppressing generation of inrush current during activation of a DC-DC converter, which controls output with control signals. The control circuit includes first and second error amplification circuits, each of which generates a control signal based on the difference between a reference voltage and voltage derived from an output voltage or an output current. During activation of the DC-DC converter, a soft start circuit generates a soft start signal having voltage lower than voltage of each control signal to control the output of the DC-DC converter. During activation of the DC-DC converter, a clamp circuit, which is connected to the first and second error amplification circuits, clamps the voltage of the first and second control signals to substantially the same voltage as the soft start signal.
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patent: 4806842 (1989-02-01), Bittner
patent: 5610503 (1997-03-01), Fogg et al.
patent: 6127814 (2000-10-01), Goder
patent: 7002330 (2006-02-01), Kitani et al.
patent: 7019507 (2006-03-01), Dittmer et al.
patent: 2004/0046902 (2004-03-01), Yamasaki
patent: 3405871 (2003-07-01), None
Dogome Hirofumi
Matsumoto Takashi
Takimoto Kyuichi
Arent & Fox LLP
Fujitsu Limited
Vu Bao Q.
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