POWER TRANSFER DEVICE AND METHOD
First Claim
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1. A power transfer device for charging a wireless communication device having a communication bandwidth, the power transfer device transferring power at a transfer frequency using a spread-spectrum technique to reduce or minimize interference signals within the communication bandwidth.
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Abstract
The present invention provides a power transfer device for charging a wireless communication device having a communication bandwidth, and an associated method of transferring power. The device and method of the invention use a spread-spectrum technique to reduce or minimize interference signals within the communication bandwidth and within the power transfer device.
104 Citations
42 Claims
- 1. A power transfer device for charging a wireless communication device having a communication bandwidth, the power transfer device transferring power at a transfer frequency using a spread-spectrum technique to reduce or minimize interference signals within the communication bandwidth.
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21. A power transfer device for charging a wireless communication device having a communication bandwidth, the power transfer device transferring power at a transfer frequency, wherein either:
- the transfer frequency is selected to be greater than or equal to the magnitude of the communication bandwidth;
or the transfer frequency is selected to be less than the magnitude of the communication bandwidth and the power transfer device transfers power using a spread-spectrum technique to reduce or minimize interference signals within the communication bandwidth.
- the transfer frequency is selected to be greater than or equal to the magnitude of the communication bandwidth;
- 22. A method of transferring power to a wireless communication device having a communication bandwidth, the method including using a spread-spectrum technique to transfer power at a transfer frequency to reduce or minimize interference signals within the communication bandwidth.
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42. A method of transferring power to a wireless communication device having a communication bandwidth, the method including selecting to either:
- transfer power at a transfer frequency greater than or equal to the magnitude of the communication bandwidth;
or use a spread-spectrum technique to transfer power at a transfer frequency less than the communication bandwidth to reduce or minimize interference signals within the communication bandwidth.
- transfer power at a transfer frequency greater than or equal to the magnitude of the communication bandwidth;
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