Near Field Communications, NFC, Communicators and NFC Communications Enabled Devices
4 Assignments
0 Petitions
Accused Products
Abstract
A NFC communicator or NFC communications enabled device has a data store to store data, an inductive coupler to couple inductively with the magnetic field of a radio frequency signal and a signal supplier to supply a radio frequency signal to the inductive coupler. A modulator is provided to modulate a radio frequency signal in accordance with data and a demodulator is provided to extract data from a modulated radio frequency signal inductively coupled to the coupler A controller enables the NFC communicator or NFC communications enabled device both to initiate near field radio frequency communication with another near field RF communicator and to respond to near field radio frequency communication initiated by another near field RF communicator. The inductive coupler has an antenna and a variable impedance element and the controller is operable to control the variable impedance element to control a magnetic field strength associated with a radio frequency signal supplied by the signal supplier.
9 Citations
39 Claims
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1-23. -23. (canceled)
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24. A near field communications (NFC) communicator, comprising:
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an inductive coupler, having a gain-controlled impedance element, configured to couple inductively with a magnetic field of a first radio frequency signal and a second magnetic field; a modulator, coupled to the inductive coupler, configured to modulate first data to provide the first radio frequency signal; a demodulator, coupled to the inductive coupler, configured to extract second data from the second radio frequency signal; and a controller configured to control the gain-controlled impedance element to control a magnetic field strength of the magnetic field. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A near field communications (NFC) communicator, comprising:
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means for coupling inductively with a magnetic field of a first radio frequency signal and a second magnetic field, the means for coupling having a gain-controlled impedance element; means for modulating first data to provide the first radio frequency signal; means for demodulating second data from the second radio frequency signal; and means for controlling the gain-controlled impedance element to control a magnetic field strength of the magnetic field. - View Dependent Claims (36, 37, 38, 39)
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Specification