Systems, methods, and apparatus for rectifier filtering for input waveform shaping
First Claim
Patent Images
1. A wireless power receiver comprising:
- a receive coil configured to generate an alternating current (AC) generated via a wireless field provided from a wireless power transmitter, the alternating current (AC) having an operating frequency;
a full wave rectifier circuit configured to provide direct-current (DC) based at least in part on the alternating current (AC);
a first band-stop filter circuit configured to be tuned to the operating frequency to reduce wireless emissions radiating from the receive coil, filter an output of the full wave rectifier circuit and electrically isolate a capacitor from the full wave rectifier circuit at the operating frequency; and
a second band-stop filter circuit configured to electrically isolate a ground connection from the full wave rectifier circuit at the operating frequency.
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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 is provided. The wireless power receiver includes a rectifier circuit configured to provide direct-current (DC) based at least in part on a time-varying voltage generated via a wireless field provided from a wireless power transmitter. The wireless power receiver further includes a band-stop filter circuit configured to filter an output of the rectifier circuit and electrically isolate a capacitor from the rectifier circuit at an operating frequency.
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Citations
35 Claims
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1. A wireless power receiver comprising:
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a receive coil configured to generate an alternating current (AC) generated via a wireless field provided from a wireless power transmitter, the alternating current (AC) having an operating frequency; a full wave rectifier circuit configured to provide direct-current (DC) based at least in part on the alternating current (AC); a first band-stop filter circuit configured to be tuned to the operating frequency to reduce wireless emissions radiating from the receive coil, filter an output of the full wave rectifier circuit and electrically isolate a capacitor from the full wave rectifier circuit at the operating frequency; and a second band-stop filter circuit configured to electrically isolate a ground connection from the full wave rectifier circuit at the operating frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 33)
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11. A method for filtering at a wireless power receiver, the method comprising:
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generating, via a receive coil, an alternating current (AC) generated via a wireless field provided from a wireless power transmitter, the alternating current (AC) having an operating frequency; rectifying the alternating current (AC) to a direct-current (DC) via a full wave rectifier circuit electrically connected to the receive coil; filtering an output of the full wave rectifier circuit via a first band-stop filter circuit tuned substantially to the operating frequency to reduce wireless emissions radiating from the receive coil and to electrically isolate a capacitor from the full wave rectifier circuit at the operating frequency; and filtering the output of the full wave rectifier circuit via a second band-stop filter circuit to electrically isolate a ground connection from the full wave rectifier circuit at the operating frequency. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 34)
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21. A wireless power receiver comprising:
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means for generating an alternating current (AC) generated via a wireless field provided from a wireless power transmitter, the alternating current (AC) having an operating frequency; means for full wave rectifying at least part of the alternating current (AC) to a direct-current (DC); first means for filtering an output of the means for rectifying tuned substantially to the operating frequency to reduce wireless emissions radiating from the means for generating the alternating current (AC) and to electrically isolate a capacitor from the means for rectifying at the operating frequency; and second means for filtering configured to electrically isolate a ground connection from the means for rectifying at the operating frequency. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 35)
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Specification