Power supply device and recording apparatus

Details Power supply device and recording apparatus Power supply device and recording apparatus

2008-03-26

2010-06-29

Laxton, Gary L (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C320S166000

Reexamination Certificate

active

07746049

ABSTRACT:
A power supply device includes a DC-DC converter configured to regulate an output voltage based on an externally input instruction, and a discharge circuit connected to an output capacitor of the DC-DC converter, wherein the discharge circuit includes a switch element configured to switch between a conductive state and a nonconductive state according to an instruction, and a capacitor-resistor (C-R) circuit configured to charge electric charge accumulated in the output capacitor of the DC-DC converter when the switch element is conductive and to discharge the electric charge to ground when the switch element is nonconductive.

REFERENCES:
patent: 4792746 (1988-12-01), Josephson et al.
patent: 5216586 (1993-06-01), Saito
patent: 7071668 (2006-07-01), Sasaki
patent: 7279874 (2007-10-01), Kazunori
patent: 2005-168235 (2005-06-01), None

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