Television – Camera – system and detail
Reexamination Certificate
2008-06-12
2010-02-02
Vu, Bao Q (Department: 2838)
Television
Camera, system and detail
C348S370000, C348S371000, C348S372000, C348S211990, C307S066000, C363S059000
Reexamination Certificate
active
07656427
ABSTRACT:
A charge pump can be used with a bus-powered device connected to a bus. The charge pump is formed of a power connection from the bus carrying a DC power signal constrained to not exceed a given current limit and a given voltage limit, a DC-to-DC step-down voltage converter, a capacitor, and a DC-to-DC step-up voltage converter. The step-down converter has an input connected to the power connection and produces an intermediate signal having a voltage the same or less than the voltage of the power signal. The capacitor is connected to the output of the step-down converter. The step-up converter has an input connected to the output of the step-down converter and to the capacitor, and produces a final output signal having a voltage greater than the given voltage limit. The output of the step-up converter is connected to and provides DC power to the device.
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Johnson Jay
Reynolds Thomas Leonard
Electro Scientific Industries Inc.
Stoel Rives LLP
Vu Bao Q
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