Tunable synchronous rectifier
First Claim
Patent Images
1. A system for power transfer comprising:
- an inductive power device;
an adjustable impedance coupled to the inductive power device, the adjustable impedance for dynamically controlling the gain in the inductive power device; and
an impedance controller for setting an impedance value of the adjustable impedance, wherein the impedance controller is configured to periodically determine whether optimized power is present in a received power signal and to adjust the impedance value of the adjustable impedance to reduce attenuation of the received power signal.
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Accused Products
Abstract
A system for power transfer is provided. In one exemplary embodiment, the system includes an inductive power device, such as a device that transmits or receives power over an inductive coupling. For example, an adjustable impedance is coupled to the inductive power device, where the adjustable impedance is used for dynamically controlling the power gain in the inductive power device, such as by damping power generated by circuit impedances, such as inductances, capacitances or resistances, and combinations thereof.
5 Citations
19 Claims
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1. A system for power transfer comprising:
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an inductive power device; an adjustable impedance coupled to the inductive power device, the adjustable impedance for dynamically controlling the gain in the inductive power device; and an impedance controller for setting an impedance value of the adjustable impedance, wherein the impedance controller is configured to periodically determine whether optimized power is present in a received power signal and to adjust the impedance value of the adjustable impedance to reduce attenuation of the received power signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for power transfer comprising:
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an inductive power device, the inductive power device including a plurality of coupling inductances and a plurality of capacitances; an adjustable impedance coupled to the inductive power device, the adjustable impedance for controlling power gain in the inductive power device, wherein optimized power to a load is generated by one or more of the plurality of coupling inductances and the plurality of capacitances; a receiver coupled to the inductive power device, wherein the receiver is configured to receive a power signal and generate a control signal for the adjustable impedance in response to the power signal; a power monitor for determining whether optimized power is present at the load; and an impedance controller for setting an impedance value of the adjustable impedance, wherein the impedance controller comprises means for varying the adjustable impedance to optimize the impedance value of the adjustable impedance to reduce ringing without excessive attenuation of a received signal.
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10. A method for receiving power comprising:
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receiving a power signal at an inductive power device; dynamically adjusting an impedance value of an adjustable impedance circuit coupled to the inductive power device to control power gain in the inductive power device; generating a control signal for adjusting the adjustable impedance in response to the power signal; determining whether ringing is present in the power signal after adjusting the adjustable impedance; and modifying the control signal if ringing is present in the power signal. - View Dependent Claims (11, 12)
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13. A method for receiving power comprising:
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receiving a power signal at an inductive power device; dynamically adjusting an impedance value of an adjustable impedance circuit coupled to the inductive power device to control power gain in the inductive power device; and decreasing the adjustable impedance to reduce ringing.
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14. A method for receiving power comprising:
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receiving a power signal at an inductive power device; dynamically adjusting an impedance value of an adjustable impedance circuit coupled to the inductive power device to control power gain in the inductive power device; and increasing the adjustable impedance to reduce attenuation of the power signal.
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15. A method for receiving power comprising:
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receiving a power signal at an inductive power device; dynamically adjusting an impedance value of an adjustable impedance circuit coupled to the inductive power device to control power gain in the inductive power device; periodically determining whether optimized power is present in the power signal; and adjusting the impedance value of the adjustable impedance to optimize power to the load.
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16. A method for receiving power comprising:
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receiving a power signal at an inductive power device; dynamically adjusting an impedance value of an adjustable impedance circuit coupled to the inductive power device to control power gain in the inductive power device; periodically determining whether ringing is present in the received power signal; and adjusting the impedance value of the adjustable impedance to reduce attenuation of the received power signal if ringing is not present.
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17. A system for power transfer comprising:
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an inductive power device; an adjustable impedance coupled to the inductive power device, the adjustable impedance for dynamically controlling the gain in the inductive power device; and an impedance controller for setting an impedance value of the adjustable impedance, wherein the impedance controller is configured to periodically determine whether ringing is present in a received power signal and to adjust the impedance value of the adjustable impedance to reduce the ringing if ringing is present. - View Dependent Claims (18, 19)
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Specification