Power-supply device and hard disk drive using same

Details Power-supply device and hard disk drive using same Power-supply device and hard disk drive using same

2007-01-30

2007-01-30

Han, Jessica (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S283000, C323S286000

Reexamination Certificate

active

10912149

ABSTRACT:
The object of the invention is to compensate an effect of a voltage drop emerging in output voltage by the equivalent series resistance of a power output filter in a power-supply device. To achieve the object, a power-supply device wherein the power output filter that passes output power and first and second filters provided separately from the power output filter are provided, the first filter provided separately and one input terminal of an error amplifier are connected, new reference voltage acquired by adding differential voltage between the output of the second filter provided separately and the output of the power output filter to reference voltage is input to the other input terminal of the error amplifier and an output signal is fed back to the error amplifier is provided. According to the power-supply device, a voltage drop by equivalent series resistance emerging the output voltage of the power-supply device can be compensated.

REFERENCES:
patent: 5731731 (1998-03-01), Wilcox et al.
patent: 6469481 (2002-10-01), Tateishi
patent: 6873140 (2005-03-01), Saggini et al.

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