US 10,770,928 B2 · Wireless charging device with multi-tone data receiver

Abstract

A wireless power transmitting device transmits wireless power signals modulated at a given power frequency to a wireless power receiving device using a wireless power transmitting coil. The wireless power receiving device may transmit data signals to the wireless power transmitting device. The wireless power transmitting device may include a data receiver that is coupled to the wireless power transmitting coil and that receives the transmitted data. The data receiver may include an input stage, bandpass filter circuitry, demodulator circuitry, and a data stream combiner. The bandpass filter circuitry may include at least two bandpass filter circuits for passing through signals at the power frequency and some harmonic of the power frequency. The demodulator circuitry may extract amplitude and phase information from the bandpass filtered signals and to generate multiple demodulated data streams. The data stream combiner may correlate the demodulated data streams and combine the correlated data streams.

Claims21

Dependent claims

A wireless power transmitting device operable with a wireless power receiving device that has a wireless power receiving coil modulated to transmit data to the wireless power transmitting device, the wireless power transmitting device comprising:

a wireless power transmitting coil;
wireless power transmitting circuitry coupled to the wireless power transmitting coil and configured to transmit wireless power signals with the wireless power transmitting coil;
and
a data receiver coupled to the wireless power transmitting coil, the data receiver comprising:
a first bandpass filter circuit configured to receive signals from the wireless power transmitting coil, to selectively pass the received signals at a first frequency, and to generate corresponding first bandpass filtered signals;
a second bandpass filter circuit configured to receive the signals from the wireless power transmitting coil, to selectively pass the received signals at a second frequency that is different than the first frequency, and to generate corresponding second bandpass filtered signals;
a first demodulator circuit configured to receive the first bandpass filtered signals and to produce a first demodulated data stream;
a second demodulator circuit configured to receive the second bandpass filtered signals and to produce a second demodulated data stream;
and
a data stream combiner configured to correlate the first and second data streams and to combine the correlated first and second data streams.

7 more elements

a wireless power transmitting coil;
wireless power transmitting circuitry coupled to the wireless power transmitting coil and configured to transmit wireless power signals with the wireless power transmitting coil;
and
a data receiver coupled to the wireless power transmitting circuitry, the data receiver comprising:
bandpass filter circuitry configured to receive signals from the wireless power transmitting coil and to provide corresponding bandpass filtered signals;
demodulator circuitry configured to produce multiple demodulated data streams from the bandpass filtered signals;
and
a data stream combiner configured to produce a corresponding output data stream by aligning the multiple demodulated data streams.

5 more elements

Dependencies are inferred from the claim text.

Wireless charging device with multi-tone data receiver

Life of this patent

Wireless charging device with multi-tone data receiver

Life of this patent

Abstract

Claims21