Tuneable NFC-enabled device
First Claim
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1. A near field communications (NFC)-enabled device, comprising:
- a magnetic field sensor configured to sense a magnetic field strength to provide a sensed field strength signal; and
a controller configured to vary an operating parameter of the NFC-enabled device in response to the sensed field strength signal using a peak detection process, the controller being further configured to;
change the operating parameter in a plurality of increments until a final increment adversely affects the operating parameter; and
set the operating parameter to an increment immediately before the final increment;
wherein the magnetic field sensor is further configured to generate the sensed field strength signal to cause the controller to vary the operating parameter when the magnetic field strength is less than a threshold.
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Abstract
An NFC-enabled device configured at least in part as an integrated circuit, the integrated circuit including a controller and a plurality of capacitors. The controller is operable to control one or more of the plurality of capacitors to vary an operating parameter of the NFC-enabled device.
21 Citations
21 Claims
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1. A near field communications (NFC)-enabled device, comprising:
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a magnetic field sensor configured to sense a magnetic field strength to provide a sensed field strength signal; and a controller configured to vary an operating parameter of the NFC-enabled device in response to the sensed field strength signal using a peak detection process, the controller being further configured to; change the operating parameter in a plurality of increments until a final increment adversely affects the operating parameter; and set the operating parameter to an increment immediately before the final increment; wherein the magnetic field sensor is further configured to generate the sensed field strength signal to cause the controller to vary the operating parameter when the magnetic field strength is less than a threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of operating a near field communications (NFC) -enabled device, comprising:
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generating a magnetic field strength signal from a detected magnetic field near the NFC-enabled device when the magnetic field strength signal is less than a threshold; adjusting a capacitance of a plurality of capacitors by a first increment to vary an operating parameter of the NFC-enabled device upon receipt of the magnetic field strength signal; adjusting the capacitance of the plurality of capacitors by a second increment to vary the operating parameter; and determining whether the second increment adversely affects the operating parameter when compared to the first increment. - View Dependent Claims (13, 14, 15, 16)
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17. A near field communications (NFC)-enabled device, comprising:
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an inductive coupler configured to inductively receive a signal; a magnetic field sensor configured to sense a magnetic field strength of the signal; a controller configured to vary an operating parameter of the NFC-enabled device in response to the magnetic field strength using a peak detection process, the controller being further configured to; change the operating parameter in a plurality of increments until a final increment adversely affects the operating parameter; and set the operating parameter to an increment immediately before the final increment; wherein the magnetic field sensor is further configured to generate a sensed field strength signal from the sensed magnetic field strength to cause the controller to vary the operating parameter when the magnetic field strength is less than a threshold. - View Dependent Claims (18, 19, 20, 21)
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Specification