Suppression of audible harmonics in wireless power receivers
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United States of America Patent
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Apr 24, 2018
Issued Date -
N/A
app pub date -
Sep 26, 2014
filing date -
Sep 26, 2014
priority date (Note) -
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Abstract
A wireless power enabled apparatus includes a wireless power receiver. The wireless power receiver includes a receive coil, a rectifier, a regulator, and a damping circuit. The receive coil is configured to generate an AC power signal responsive to a wireless power signal. The rectifier is configured to receive the AC power signal and generate a DC rectified power signal relative to a rectified ground signal. The regulator is operably coupled with the rectifier to receive the DC rectified power signal and generate an output voltage. The damping circuit is operably coupled between the DC rectified power signal and the rectified ground signal and in parallel with the regulator. The damping circuit is configured to suppress audible harmonics generated by the wireless power receiver at some loads by providing a damping impedance for the DC rectified power signal.
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