HEARING INSTRUMENT COMPRISING A RECHARGEABLE POWER SOURCE
3 Assignments
0 Petitions
Accused Products
Abstract
A hearing instrument having an audio signal source for providing for audio signals; an audio signal processing unit for processing said audio signals; a unit to be worn at or in a user'"'"'s ear or to be implanted in the user'"'"'s head for stimulating the user'"'"'s hearing according to the processed audio signals, and a rechargeable power source, in which the rechargeable power source is a wound capacitor comprising a capacitor foil arrangement which has at least a first electrically conducting layer, a second electrically conducting layer and a dielectric layer in-between and which is wound in a manner so as to form an induction coil for generating a current for charging of the capacitor when exposed to an external alternating electromagnetic field generated by a charging device.
14 Citations
44 Claims
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1-22. -22. (canceled)
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23. A hearing instrument comprising:
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an audio signal source for providing for audio signals; an audio signal processing unit for processing said audio signals; means to be worn at or in a user'"'"'s ear or to be implanted in a user'"'"'s head for stimulating a user'"'"'s hearing according to processed audio signals, and a rechargeable power source, wherein the rechargeable power source is a wound capacitor comprising a capacitor foil arrangement which comprises at least a first electrically conducting layer, a second electrically conducting layer and a dielectric layer in-between the first electrically conducting layer and the second electrically conducting layer and which is wound in a manner so as to form an induction coil for generating a current for charging of the capacitor when exposed to an external alternating electromagnetic field generated by a charging device. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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44. Method of charging a hearing instrument having a rechargeable power source having a wound capacitor comprising a capacitor foil arrangement which comprises at least a first electrically conducting layer, a second electrically conducting layer and a dielectric layer in-between the first electrically conducting layer and the second electrically conducting layer and which is wound in a manner so as to form an induction coil for generating a current for charging of the capacitor when exposed to an external alternating electromagnetic field generated by a charging device, comprising the steps of:
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generating alternating external electromagnetic field for charging of the capacitor foil arrangement by inducing a voltage in the capacitor foil arrangement during a first half of a cycle of the alternating external electromagnetic to drive a charging current to an auxiliary capacitor connected to the capacitor foil arrangement to charge the auxiliary capacitor, and using a voltage at the auxiliary capacitor together with the voltage induced in the capacitor foil arrangement to drive a charging current to the capacitor foil arrangement during a second half of the cycle of the alternating external electromagnetic field.
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Specification