WIRELESS LOAD MODULATION
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United States of America Patent
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app pub date -
Apr 1, 2016
filing date -
Feb 10, 2014
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Abstract
Techniques of wireless power transmission are described herein. An example wireless power transmitting apparatus may include a coil and control circuitry. The control circuitry is configured to apply a first signal to the coil and measure a change in a current in the coil to discover presence of an object. The control circuitry is also configured to provide a second signal to the coil, subsequent to discovering presence of the object. The control circuitry is also configured to detect whether the object is a Power Receiver based on whether a load modulated signal is received from the object subsequent to providing the second signal. The control circuitry is also configured to perform power transfer to the object subsequent to detection that the object is a Power Receiver.
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