Electricity: battery or capacitor charging or discharging – Cell or battery charger structure
Reexamination Certificate
2004-12-30
2010-02-16
Tso, Edward (Department: 2858)
Electricity: battery or capacitor charging or discharging
Cell or battery charger structure
C320S112000, C362S183000, C348S373000, C429S096000, C455S573000
Reexamination Certificate
active
07663338
ABSTRACT:
In accordance with the teachings described herein, a method and apparatus for handling a charging state in a mobile electronic device is provided. A universal serial bus (USB) interface may be used for connecting the mobile device to a USB host. A processing device may be used to execute programs and to control operation of the mobile device. The processing device may be operable to receive an enumeration acknowledgement signal from the USB host via the USB interface and generate an enable signal upon receiving the enumeration acknowledgement signal. A rechargeable battery may be used to power the processing device. A battery charger may be used to receive a USB bus voltage from the USB interface and use the USB bus voltage to power the processing device and to charge the rechargeable battery. The battery charger may be further operable to receive a charge enable signal that enables and disables the battery charger from powering the processing device and charging the rechargeable battery. A timing circuit may be used to detect the USB bus voltage and to measure the passage of a pre-determined amount of time upon detecting the USB bus voltage. A battery charger enabling circuit may be used to generate the charge enable signal to control the battery charger, the battery charger enabling the battery charger if the timer has measured the passage of the pre-determined amount of time or the enable signal is received from the processing device.
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Guthrie Martin G. A.
Habicher Michael F.
Skarine Alexei
Veselic Dusan
Brown, Jr. J. Robert
Conley & Rose, P.C.
Fantu Yalkew
Research In Motion Limited
Tso Edward
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