Methods and apparatuses for power control during backscatter modulation in wireless power receivers
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United States of America Patent
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Mar 27, 2018
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N/A
app pub date -
Sep 26, 2014
filing date -
Sep 26, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
A wireless power enabled apparatus including a wireless power receiver. The wireless power receiver includes a receive coil configured to generate an AC power signal responsive to a wireless power signal. A rectifier is configured to receive the AC power signal and generate a DC rectified power signal. A power transistor in a pass-transistor configuration is configured to receive the DC rectified power signal and generate an output power signal. A compensation current source operably coupled to the output power signal is configured to maintain a substantially constant voltage on the output power signal by adjusting a current through the compensation current source during a communication period employing backscatter modulation on the receive coil.
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