ADAPTIVE SIGNAL SCALING IN NFC TRANSCEIVERS
First Claim
Patent Images
1. A transceiver, comprising:
- a programmable load modulation element configured for load modulation in a tag mode;
a sensing element for measuring an amount of power harvested by the transceiver in the tag mode; and
a controller coupled to each of the programmable load modulation element and the sensing element and configured for adjusting a depth of load modulation of the programmable load modulation element depending on the amount of power harvested.
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Abstract
Exemplary embodiments are directed to adaptive signal scaling in NFC transceivers. A transceiver may include a programmable load modulation element configured for load modulation in a tag mode. Further, the transceiver may include a sensing element for measuring an amount of power harvested by the transceiver in the tag mode. The transceiver may also include a controller configured for adjusting a depth of load modulation of the programmable load modulation element depending on the amount of power harvested.
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Citations
25 Claims
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1. A transceiver, comprising:
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a programmable load modulation element configured for load modulation in a tag mode; a sensing element for measuring an amount of power harvested by the transceiver in the tag mode; and a controller coupled to each of the programmable load modulation element and the sensing element and configured for adjusting a depth of load modulation of the programmable load modulation element depending on the amount of power harvested. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A transceiver, comprising:
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an attenuator for attenuating an input signal; a sensing element coupled to the attenuator and configured for measuring an amplitude of the input signal; and a controller configured for adjusting an attenuation ratio of the attenuator depending on the amplitude of the input signal. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. A method, comprising:
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measuring an amplitude of a received input signal; comparing the amplitude of the received input signal to a maximum threshold amplitude; and adjusting an attenuation ratio of an attenuator in response to comparing the amplitude of the received input signal to the maximum threshold amplitude. - View Dependent Claims (16, 17)
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18. A method, comprising:
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measuring an amount of power harvested by a transceiver during load modulation; comparing the amount of power harvested to a minimum harvested power threshold; and adjusting a depth of load modulation in response to comparing the amount of power harvested to the minimum harvested power threshold. - View Dependent Claims (19, 20)
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21. A device, comprising:
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means for measuring an amplitude of a received input signal; and means for comparing the amplitude of the received input signal to a maximum threshold amplitude; and means for adjusting an attenuation ratio of an attenuator in response to comparing the amplitude of the received input signal to the maximum threshold amplitude.
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22. A device, comprising:
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means for measuring an amount of power harvested by a transceiver during load modulation; means for comparing the amount of power harvested to a minimum harvested power threshold; and means for adjusting a depth of load modulation in response to comparing the amount of power harvested to the minimum harvested power threshold.
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23. A transceiver, comprising:
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an adaptive scaling element; a sensing element coupled to the adaptive scaling element and configured to sense at least one parameter of the transceiver; and a controller coupled to each of the scaling element and the sensing element and configured to adaptively scale one of a received input signal and a load modulation depth with the adaptive scaling element depending on the at least one sensed parameter. - View Dependent Claims (24, 25)
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Specification