Portable electronic device for wearing at the ear and a method of operating a portable electronic device
AssigneeTeknologisk Institut
InventorsKlaus Krogsgaard, Torsten Lund-Olesen, Christian Kallesoee, Jan Harry Hales, Leif Hoejslet Christensen, Preben Kidmose
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Abstract
A portable electronic device (100) comprises a fuel cell (101) and a boost converter (102), wherein said boost converter (102) is adapted for boosting the fuel cell voltage to a level suitable to power the portable electronic device (100) and wherein said boost converter (102) is powered by said fuel cell (101). The invention also provides a method of operating a portable electronic device.
Claims16
A portable electronic device adapted to be worn, at least partly, in or at a human ear, comprising a fuel cell and a boost converter, wherein said boost converter is adapted for increasing the fuel cell output voltage to a level suitable to power the portable electronic device and wherein said boost converter is powered by the fuel cell.
A method of operating a portable electronic device comprising the steps of:
- providing a low voltage power supply, providing a boost converter circuitry, operating the boost converter circuitry in a first mode optimized for low supply voltage operation, switching from said first mode of operation to a second mode of operation in response to the detection of a trigger event, operating the boost converter circuitry in said second mode of operation, wherein said second mode of operation is optimized with respect to at least one feature selected from a group comprising:
- stability of the boosted voltage, power efficiency of the boost converter circuitry, and the peak power that the boost converter circuitry can provide.
Dependencies are inferred from the claim text.