Active solid-state devices (e.g. – transistors – solid-state diode – Regenerative type switching device – Bidirectional rectifier with control electrode
Reexamination Certificate
2007-06-08
2010-11-30
Gurley, Lynne A (Department: 2811)
Active solid-state devices (e.g., transistors, solid-state diode
Regenerative type switching device
Bidirectional rectifier with control electrode
C257S104000, C257S288000, C257S367000, C257S570000, C257S467000, C257S498000, C257S551000, C257S603000, C257S565000, C257SE27064, C257SE29174, C257SE29195, C257SE29199, C257SE29330, C257SE29332, C323S282000
Reexamination Certificate
active
07842967
ABSTRACT:
A power supply device is disclosed that is able to satisfy the power requirements of a device in service and has high efficiency.The power supply device includes a first power supply; a voltage step-up unit that steps up an output voltage of the first power supply; a voltage step-down unit that steps down an output voltage of the voltage step-up unit; and a load that is driven to operate by an output voltage of the voltage step-down unit. The voltage step-up unit steps up the output voltage of the first power supply to a lower limit of an operating voltage of the voltage step-down unit.
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Ohtsuka Masaya
Ueda Yoshinori
Cooper & Dunham LLP
Gurley Lynne A
Li Meiya
Ricoh & Company, Ltd.
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