Electronic device capable of automatically selecting a power...

Details Electronic device capable of automatically selecting a power... Electronic device capable of automatically selecting a power...

2008-07-17

2010-11-30

Fureman, Jared J (Department: 2836)

Electrical transmission or interconnection systems

Plural supply circuits or sources

Selective or optional sources

Reexamination Certificate

active

07843084

ABSTRACT:
An exemplary electronic device capable of automatically selecting a power source includes two power ports configured to connect to external power sources and a battery compartment configured to receive a battery module. The voltage of the battery module is higher than at least one of the external power sources. The electronic device further includes a power selection module allocated between the battery module and the power port which selects the lower voltage. Three diodes are respectively located on the output path of the three power sources. A path switch that controls whether power to the device comes from the battery compartment or a power port is located between the anode of the battery compartment and the diode located on the output path of the battery module. Among the multiple power sources, the external power source providing a higher voltage is the first to be chosen to power the electronic device.

REFERENCES:
patent: 2007/0018502 (2007-01-01), Bazinet
patent: 2838129 (2006-11-01), None

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