SYSTEMS, METHODS, AND APPARATUS FOR RECTIFIER FILTERING FOR INPUT WAVEFORM SHAPING
First Claim
1. A wireless power receiver apparatus, the apparatus comprising:
- a coil circuit configured to wirelessly receive power via a wireless field;
a rectifier circuit configured to provide direct-current (DC) based at least in part on the received power;
a first filter circuit electrically connected between the coil and the rectifier circuit and configured to reduce emissions from the rectifier circuit and configured to maintain a first impedance presented by the rectifier circuit substantially equal to a second impedance presented to the coil circuit; and
a band-stop filter circuit configured to electrically isolate emissions from the rectifier circuit.
1 Assignment
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Accused Products
Abstract
This disclosure provides systems, methods, and apparatus for filtering of a rectifier in a wireless power receiver. In one aspect a wireless power receiver apparatus is provided. The receiver apparatus includes a coil circuit configured to wirelessly receive power via a wireless field. The receiver apparatus further includes a rectifier circuit configured to provide direct-current (DC) based at least in part on the received power. The receiver apparatus further includes a first filter circuit electrically connected between the coil and the rectifier circuit and configured to reduce emissions from the rectifier circuit and configured to maintain a first impedance presented by the rectifier circuit substantially equal to a second impedance presented to the coil circuit. The receiver apparatus further includes a band-stop filter circuit configured to electrically isolate emissions from the rectifier circuit.
23 Citations
18 Claims
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1. A wireless power receiver apparatus, the apparatus comprising:
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a coil circuit configured to wirelessly receive power via a wireless field; a rectifier circuit configured to provide direct-current (DC) based at least in part on the received power; a first filter circuit electrically connected between the coil and the rectifier circuit and configured to reduce emissions from the rectifier circuit and configured to maintain a first impedance presented by the rectifier circuit substantially equal to a second impedance presented to the coil circuit; and a band-stop filter circuit configured to electrically isolate emissions from the rectifier circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of filtering at a wireless power receiver, the method comprising:
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wirelessly receiving power via a coil circuit, the wirelessly received power received via a wireless field; rectifying at least part of the received power to a direct-current (DC) via a rectifier circuit; filtering emissions from the rectifier circuit via a first filter circuit while maintaining a first impedance presented by the rectifier circuit substantially equal to a second impedance presented to the coil circuit; and electrically isolating emissions from the rectifier circuit via a band-stop filter circuit. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A wireless power receiver apparatus comprising:
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means for wirelessly receiving power via a wireless field; means for providing direct-current (DC) based at least in part on the received power; means for filtering to reduce emissions from the means for providing direct-current, the means for filtering comprising means for maintaining a first impedance presented by the means for providing direct-current equal to a second impedance presented to the means for wirelessly receiving power; and means for electrically isolating emissions from the means for providing direct-current. - View Dependent Claims (17, 18)
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Specification