Wireless power and data apparatus, system and method
First Claim
1. For use with wireless communications involving a resonant circuit having a resonant frequency susceptible to detuning, an apparatus comprising:
- a remote transponder circuit;
a transceiver circuit configured and arranged totransmit radio frequency (RF) power to the remote transponder circuit, andwirelessly communicate with the remote transponder circuit via first and second different carrier frequencies, using the resonant circuit and the RF power, the first and second carrier frequencies being respectively set sufficiently proximate to the resonant frequency such that signals communicated based on the resonant frequency can be acquired by demodulating based on the resonant frequency; and
a frequency-selection circuit coupled to the transceiver circuit and configured and arranged to set the carrier frequency to one of the first and second carrier frequencies based upon a signal sent from the transponder circuit, wherein the frequency-selection circuit is configured and arranged to set the carrier frequency to one of the first and second carrier frequencies based upon a determination of whether the signal sent from the transponder circuit passes or fails an error condition corresponding to a threshold level at which the communicated signals can be acquired via the demodulating.
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0 Petitions
Accused Products
Abstract
Wireless data communication is implemented using respective carrier frequencies. As may be implemented in accordance with one or more embodiments and apparatuses herein, wireless communications are effected using a resonant circuit having a resonant frequency susceptible to detuning. Radio frequency power is transmitted to a remote transponder circuit, and wireless communications are effected with the remote transponder circuit via at least one of first and second different carrier frequencies, using the resonant circuit and the radio frequency power. The first and second carrier frequencies are respectively sufficiently proximate to the resonant frequency, such that signals communicated based on the resonant frequency can be acquired by demodulating based on the resonant frequency. One of the first and second carrier frequencies is selected based upon a signal sent from the transponder circuit.
16 Citations
20 Claims
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1. For use with wireless communications involving a resonant circuit having a resonant frequency susceptible to detuning, an apparatus comprising:
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a remote transponder circuit; a transceiver circuit configured and arranged to transmit radio frequency (RF) power to the remote transponder circuit, and wirelessly communicate with the remote transponder circuit via first and second different carrier frequencies, using the resonant circuit and the RF power, the first and second carrier frequencies being respectively set sufficiently proximate to the resonant frequency such that signals communicated based on the resonant frequency can be acquired by demodulating based on the resonant frequency; and a frequency-selection circuit coupled to the transceiver circuit and configured and arranged to set the carrier frequency to one of the first and second carrier frequencies based upon a signal sent from the transponder circuit, wherein the frequency-selection circuit is configured and arranged to set the carrier frequency to one of the first and second carrier frequencies based upon a determination of whether the signal sent from the transponder circuit passes or fails an error condition corresponding to a threshold level at which the communicated signals can be acquired via the demodulating. - View Dependent Claims (2, 3, 4, 5, 6, 9, 11, 12, 13, 14)
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7. For use with wireless communications involving a resonant circuit having a resonant frequency susceptible to detuning, an apparatus comprising:
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a transceiver circuit configured and arranged to transmit radio frequency (RF) power to the a remote transponder circuit, and wirelessly communicate with the remote transponder circuit via first and second different carrier frequencies, using the resonant circuit and the RF power, the first and second carrier frequencies being respectively set sufficiently proximate to the resonant frequency such that signals communicated based on the resonant frequency can be acquired by demodulating based on the resonant frequency; and a frequency-selection circuit coupled to the transceiver circuit and configured and arranged to set the carrier frequency to one of the first and second carrier frequencies based upon a signal sent from the transponder circuit, wherein the signal sent from the transponder circuit indicates, by way of amenability to accurate demodulation at the transceiver circuit, that the resonant circuit is not detuned beyond a threshold level for acquiring the signal using the first carrier frequency. - View Dependent Claims (8, 10)
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15. For use with a vehicle drive system that operates based upon authentication of a radio-frequency-powered transponder, an authentication apparatus comprising:
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a remote transponder circuit; an antenna circuit; a transceiver circuit coupled to the antenna circuit and configured and arranged to communicate radio frequency signals via the antenna circuit, and to transmit wireless radio frequency power that powers the remote transponder circuit via the antenna circuit, using a resonant circuit having a resonant frequency susceptible to detuning; a demodulator circuit configured and arranged to demodulate signals received from the remote transponder circuit; a frequency-selection circuit coupled to the transceiver circuit and configured and arranged to select one of first and second different carrier frequencies, by using the first carrier frequency, transmitting a first signal to the transponder circuit via the transceiver circuit, if a signal sent from the transponder circuit in response to the first signal is correctly acquired via the demodulator circuit, selecting the first carrier frequency for subsequent communications, and if a signal sent from the transponder circuit in response to the first signal is not correctly acquired via the demodulator circuit, selecting the second carrier frequency for subsequent communications, wherein the frequency-selection circuit is configured and arranged to set the carrier frequency to one of the first and second carrier frequencies based upon a determination of whether the signal sent from the transponder circuit passes or fails an error condition corresponding to a threshold level at which the communicated signals can be acquired via the demodulating, wherein the transceiver circuit is configured and arranged with the frequency-selection circuit to use the selected carrier frequency to further communicate authentication data with the transponder circuit; and an authentication circuit configured and arranged to authenticate the transponder circuit based upon the authentication data, and generate an output signal indicative of the transponder circuit authentication, the output signal being configured and arranged to facilitate operation of the vehicle drive system. - View Dependent Claims (16, 17)
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18. For use with wireless communications involving a resonant circuit having a resonant frequency susceptible to detuning, a method comprising:
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transmitting RF power from a base station to a remote transponder circuit; wirelessly communicating with the remote transponder circuit via at least one of first and second different carrier frequencies using the resonant circuit, the first and second carrier frequencies being respectively sufficiently proximate to the resonant frequency such that signals communicated based on the resonant frequency can be acquired by demodulating based on the resonant frequency, wherein transmissions between the base station and remote transponder circuit are carried out using respective carrier frequencies which correspond to the first and second carrier frequencies; and the base station performing an error check upon one of the respective carrier frequencies being an initially-used carrier frequency and the base station selecting one of the first and second carrier frequencies based upon the error check and based upon a signal sent from the transponder circuit. - View Dependent Claims (19, 20)
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Specification