Systems and methods for detecting data communication over a wireless power link
First Claim
1. A wireless power supply system, comprising:
- a tank circuit arranged to generate an electromagnetic field in response to a supply of input power;
switching circuitry coupled to said tank circuit, said switching circuitry controlling said supply of input to said tank circuit to generate said electromagnetic field;
a power supply operatively coupled to said tank circuit via said switching circuitry, said power supply supplying an input power to said switching circuitry;
a detector coupled to said switching circuitry outside said tank circuit, said detector for generating a signal indicative of said input power supplied to said switching circuitry, wherein said input power is provided to said tank circuit; and
a controller for interpreting said generated signal to extract data communications carried on said generated signal.
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Accused Products
Abstract
A wireless power supply system that detects communications in the input power to the switching circuit. In this aspect of the invention, the wireless power supply includes a detector for generating a signal indicative of the current in the input to the switching circuitry, a band-pass filter for filtering the detected signal, an amplifier for amplifying the filtered signal, a filter for filtering the amplified signal and a comparator for converting the final signal into a stream of high and low signals that can be passed to a controller for processing as binary data stream. In a second aspect, the wireless power supply system includes a detector for generating a signal that varies in dependence on changes in the phase relationship between the current and the voltage in the primary-side tank circuit, a band-pass filter for filtering the signal, an amplifier for amplifying the filtered signal, a filter for filtering the amplified signal and a comparator for converting the final signal into a stream of high and low signals that can be passed to a controller for processing as binary data stream.
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Citations
14 Claims
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1. A wireless power supply system, comprising:
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a tank circuit arranged to generate an electromagnetic field in response to a supply of input power; switching circuitry coupled to said tank circuit, said switching circuitry controlling said supply of input to said tank circuit to generate said electromagnetic field; a power supply operatively coupled to said tank circuit via said switching circuitry, said power supply supplying an input power to said switching circuitry; a detector coupled to said switching circuitry outside said tank circuit, said detector for generating a signal indicative of said input power supplied to said switching circuitry, wherein said input power is provided to said tank circuit; and a controller for interpreting said generated signal to extract data communications carried on said generated signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A wireless power supply system comprising:
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a tank circuit arranged to generate an electromagnetic field in response to a supply of input; a power supply operatively coupled to said tank circuit, said power supply supplying an input power to said tank circuit; a detector for generating a signal indicative of a phase relationship between a current and a voltage in said tank circuit, said detector includes phase conversion circuitry configured to receive an input signal indicative of the current in said tank circuit, wherein said phase conversion circuitry is configured to generate an output signal that is a time-sliced combination of a buffer copy of the input signal and an inverted buffer copy of the input signal; and a controller for interpreting said generated signal to extract data communications carried on said generated signal. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification