FORWARD LINK SIGNALING WITHIN A WIRELESS POWER SYSTEM
First Claim
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1. A wireless power transmitter comprising:
- an amplifier having a bias input configured to receive a bias signal modulated with data for transmission, the amplifier configured to amplify a power transmit signal based on the received bias signal;
a control circuit configured to sense a power level of the amplifier and configured to adjust a power level of the bias signal based at least on the sensed power level of the amplifier; and
a transmit antenna configured to wirelessly transmit, based on the amplified power transmit signal, energy within a field at a level sufficient to charge or power a device.
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Abstract
Exemplary embodiments are directed to forward link signaling. A method may include modulating an input bias signal of a power amplifier according to data to be transmitted on a wireless power transmit signal. The method may further include modulating an amplitude of the wireless power transmit signal generated by the power amplifier in response to the modulated input bias signal.
3 Citations
20 Claims
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1. A wireless power transmitter comprising:
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an amplifier having a bias input configured to receive a bias signal modulated with data for transmission, the amplifier configured to amplify a power transmit signal based on the received bias signal; a control circuit configured to sense a power level of the amplifier and configured to adjust a power level of the bias signal based at least on the sensed power level of the amplifier; and a transmit antenna configured to wirelessly transmit, based on the amplified power transmit signal, energy within a field at a level sufficient to charge or power a device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for wirelessly transferring power and data, the method comprising:
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amplifying a power transmit signal based at least on a bias signal received by an amplifier, the bias signal modulated with data for transmission; sensing a power level of the amplifier; controlling a power level of the bias signal based at least on the sensed power level of the amplifier; and wirelessly transmitting, based on the amplified power transmit signal, energy within a field at a level sufficient to charge or power a device. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A device for wirelessly transferring power and data, comprising:
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means for amplifying a power transmit signal based on a bias signal modulated with data for transmission; means for sensing a power level of the amplifying means and for controlling a power level of the bias signal based at least on the sensed power level of the amplifying means; and means for wirelessly transmitting, based on the amplified power transmit signal, energy within a field at a level sufficient to charge or power an apparatus. - View Dependent Claims (18, 19, 20)
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Specification