Power transfer device and method
First Claim
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1. A device comprising:
- 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, wherein the spread-spectrum technique utilizes a direct sequence spread-spectrum method implemented with a microprocessor control unit and a voltage controlled oscillator;
wherein, the microprocessor control unit has a clock frequency and generates switching control signals for power inverter in the power transfer device, the direct sequence spread-spectrum method including storing a pseudo-random sequence in the microprocessor control unit and sending out the pseudorandom sequence to modulate the clock frequency through the voltage controlled oscillator.
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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.
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Citations
36 Claims
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1. A device comprising:
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, wherein the spread-spectrum technique utilizes a direct sequence spread-spectrum method implemented with a microprocessor control unit and a voltage controlled oscillator;
wherein, the microprocessor control unit has a clock frequency and generates switching control signals for power inverter in the power transfer device, the direct sequence spread-spectrum method including storing a pseudo-random sequence in the microprocessor control unit and sending out the pseudorandom sequence to modulate the clock frequency through the voltage controlled oscillator.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A device comprising:
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, wherein the spread-spectrum technique utilizes a direct sequence spread-spectrum method implemented with a microprocessor control unit and a voltage controlled oscillator;
wherein, the microprocessor control unit has a clock frequency and generates switching control signals for power inverter in the power transfer device, the direct sequence spread-spectrum method including storing a pseudo-random sequence in the microprocessor control unit and sending out the pseudo-random sequence to modulate the clock frequency through the voltage controlled oscillator.
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19. A method comprising:
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, wherein the spread-spectrum technique utilizes a direct sequence spread-spectrum method implemented with a microprocessor control unit and a voltage controlled oscillator;
wherein, the microprocessor control unit has a clock frequency and generates switching control signals for power inverter in the power transfer device, the direct sequence spread-spectrum method including storing a pseudo-random sequence in the microprocessor control unit and sending out the pseudo-random sequence to modulate the clock frequency through the voltage controlled oscillator.- View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A method comprising:
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, wherein the spread-spectrum technique utilizes a direct sequence spread-spectrum method implemented with a microprocessor control unit and a voltage controlled oscillator;
wherein, the microprocessor control unit has a clock frequency and generates switching control signals for power inverter in the power transfer device, the direct sequence spread-spectrum method including storing a pseudo-random sequence in the microprocessor control unit and sending out the pseudo-random sequence to modulate the clock frequency through the voltage controlled oscillator.
Specification