SYSTEMS AND METHODS FOR SENSING REVERSE LINK SIGNALING
First Claim
1. An apparatus for wireless power transmission, comprising:
- a push-pull driver circuit configured to generate a signal;
a coil electrically coupled to the push-pull driver circuit, the coil configured to receive the signal from the push-pull driver circuit and wirelessly transmit the signal to a receiver; and
a sensor electrically coupled to a virtual alternating current (AC) ground of the push-pull driver circuit or the coil, the sensor configured to sense a shift in voltage at the virtual AC ground, the shift in voltage representative of a change of an input impedance of the receiver.
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Accused Products
Abstract
Systems and methods for sensing reverse link signaling are described herein. In one aspect, an apparatus for wireless transmission includes a push-pull driver circuit, coil, and sensor. The push-pull driver circuit is configured to generate a signal. The coil is electrically coupled to the push-pull driver circuit, and the coil is configured to receive the signal from the push-pull driver circuit and wirelessly transmit the signal to a receiver. The sensor is electrically coupled to a virtual alternating current (AC) ground of the push-pull driver circuit or the coil. The sensor is configured to sense a shift in voltage at the virtual AC ground where the shift in voltage is representative of a change of an input impedance of the receiver.
17 Citations
22 Claims
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1. An apparatus for wireless power transmission, comprising:
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a push-pull driver circuit configured to generate a signal; a coil electrically coupled to the push-pull driver circuit, the coil configured to receive the signal from the push-pull driver circuit and wirelessly transmit the signal to a receiver; and a sensor electrically coupled to a virtual alternating current (AC) ground of the push-pull driver circuit or the coil, the sensor configured to sense a shift in voltage at the virtual AC ground, the shift in voltage representative of a change of an input impedance of the receiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of wireless power transmission, comprising:
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generating a signal with a push-pull driver circuit; transmitting wirelessly with a coil the signal to a receiver; and sensing with a sensor a shift in voltage at a virtual AC ground of the push-pull driver circuit or the coil, the shift in voltage representative of a change of an input impedance of the receiver. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An apparatus for wireless power transmission, comprising:
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means for generating a signal; means for transmitting wirelessly the signal to a receiver; and means for sensing a shift in voltage at a virtual AC ground of the means for generating or the means for transmitting, the shift in voltage representative of a change of an input impedance of the receiver.
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22. A non-transitory computer storage that stores executable program instructions that direct a wireless power transmitter to perform a process that comprises:
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generating a signal with a push-pull driver circuit to cause a coil to wirelessly transmit the signal to a receiver; and sensing with a sensor a shift in voltage at a virtual AC ground of the push-pull driver circuit or the coil, the shift in voltage representative of a change of an input impedance of the receiver.
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Specification