Near field RF communicators and near field communications-enabled devices
First Claim
1. A near field RF communicator having an inductive coupler to enable inductive coupling with a magnetic field of an RF signal, a demodulator to extract modulation from an inductively coupled magnetic field, a voltage regulator to regulate a power supply voltage, and regulator controller to control operation of the voltage regulator in dependence upon the magnetic field.
3 Assignments
0 Petitions
Accused Products
Abstract
A near field RF communicator has an inductive coupler (10) to enable inductive coupling with a magnetic field of an RF signal. A demodulator (102) extracts modulation from an inductively coupled magnetic field. A power provider (109) provides a first power supply for the communicator independent of any inductively coupled signal while a power deriver derives a second power supply from an RF signal inductively coupled to the antenna. A regulator (206; 1302) regulates a voltage supplied by at least one of the first and second power supplies on the basis of a comparison with a reference voltage. A modulator (M) is provided to modulate an inductively coupled magnetic field with data to be communicated via the inductive coupling. In an example, a regulator controller is provided to prevent operation of the regulator in the event of a magnetic field amplitude below a predetermined level or the presence of modulation.
84 Citations
20 Claims
- 1. A near field RF communicator having an inductive coupler to enable inductive coupling with a magnetic field of an RF signal, a demodulator to extract modulation from an inductively coupled magnetic field, a voltage regulator to regulate a power supply voltage, and regulator controller to control operation of the voltage regulator in dependence upon the magnetic field.
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8. A near field RF communicator having:
- an inductive coupler to enable inductive coupling with a magnetic field of an RF signal;
a demodulator to extract modulation from an inductively coupled magnetic field;
an error amplifier operable to control a voltage of the near field RF communicator on the basis of a comparison of a reference voltage with a further voltage;
a modulator operable to modulate an inductively coupled magnetic field with data to be communicated via the inductive coupling; and
an error amplifier controller to inhibit operation of the error amplifier in the event of at least one of a magnetic field amplitude (or strength) below a predetermined level and the presence of modulation. - View Dependent Claims (9, 10, 11, 12)
- an inductive coupler to enable inductive coupling with a magnetic field of an RF signal;
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14. An NFC communicator comprising:
- an antenna to inductively couple to the H field of an RF signal;
a power provider to provide a first power supply for the NFC communicator independent of any inductively coupled signal;
a power deriver to derive a second power supply for the NFC communicator from an RF signal inductively coupled to the antenna; and
a regulator to regulate a voltage supplied by at least one of the first and second power supplies. - View Dependent Claims (13, 15, 16, 17, 18, 19, 20)
- an antenna to inductively couple to the H field of an RF signal;
Specification