Electricity: battery or capacitor charging or discharging – Battery or cell discharging – With charging
Reexamination Certificate
2011-02-22
2011-02-22
Tso, Edward (Department: 2858)
Electricity: battery or capacitor charging or discharging
Battery or cell discharging
With charging
C320S112000, C320S114000
Reexamination Certificate
active
07893655
ABSTRACT:
Charging and power supply for mobile devices is disclosed. A USB-compliant charging and power supply circuit includes switch-mode battery charging circuitry for receiving power from an external power source and for supplying output power through an output node to an electronic system of an electronic communication device and a battery. Battery isolation circuitry includes a semiconductor switch connecting the output node to the battery. The battery isolation circuitry senses voltage at the output node and variably restricts current to the battery when the voltage is below a minimum voltage value by operationally controlling the semiconductor switch as current passes through it. During variable current restriction the electronic system is supplied required power with said battery being supplied any additional available power.
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Berhanu Samuel
Research In Motion Limited
Ridout & Maybee LLP
Tso Edward
LandOfFree
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