NEAR FIELD COMMUNICATION DEVICE
First Claim
1. A device for contactless communication comprising:
- an NFC module being adapted to generate an electromagnetic carrier signal and to modulate the carrier signal according to data to be transmitted;
an electromagnetic compatibility (EMC) filter coupled to said NFC module via output terminals of said NFC module; and
an antenna circuit coupled to and driven by said NFC module with the modulated carrier signal;
said NFC module including a powered by the field (PBF) circuit adapted to harvest energy from an external field to power said device;
said powered by the field circuit having a first terminal coupled to a first terminal of said EMC filter via a first impedance block and a second terminal coupled to a second terminal of said EMC filter via a second impedance block;
wherein said first impedance block includes a first impedance element internal to the NFC module and a second impedance element external to the NFC module, said first and second impedance elements being arranged in series;
wherein said second impedance block includes a third impedance element internal to the NFC module and a fourth impedance element external to the NFC module, said third and fourth impedance elements being arranged in series;
said device being adapted to be able to operate in a powered by the field card mode.
1 Assignment
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Accused Products
Abstract
A near field communication (NFC) device capable of operating by being powered by the field includes an NFC module for generating an electromagnetic carrier signal and modulating the carrier signal according to data to be transmitted, and an antenna circuit coupled to and driven by said NFC module with the modulated carrier signal. An electromagnetic compatibility (EMC) filter of the NFC device is coupled to the NFC module via output terminals of said NFC module. A powered by the field circuit of the NFC device is adapted to harvest energy from an external field to power said NFC device. The power by the field circuit is coupled to said EMC filter via one or more impedance elements. The NFC device is adapted to be able to operate in one of a reader mode, a battery supplied card mode, and a powered by the field card mode.
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Citations
26 Claims
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1. A device for contactless communication comprising:
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an NFC module being adapted to generate an electromagnetic carrier signal and to modulate the carrier signal according to data to be transmitted; an electromagnetic compatibility (EMC) filter coupled to said NFC module via output terminals of said NFC module; and an antenna circuit coupled to and driven by said NFC module with the modulated carrier signal; said NFC module including a powered by the field (PBF) circuit adapted to harvest energy from an external field to power said device; said powered by the field circuit having a first terminal coupled to a first terminal of said EMC filter via a first impedance block and a second terminal coupled to a second terminal of said EMC filter via a second impedance block; wherein said first impedance block includes a first impedance element internal to the NFC module and a second impedance element external to the NFC module, said first and second impedance elements being arranged in series; wherein said second impedance block includes a third impedance element internal to the NFC module and a fourth impedance element external to the NFC module, said third and fourth impedance elements being arranged in series; said device being adapted to be able to operate in a powered by the field card mode. - View Dependent Claims (3, 4, 5, 8, 9, 10, 11, 12, 13, 14, 15)
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2. (canceled)
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6. A device for contactless communication comprising:
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an NFC module being adapted to generate an electromagnetic carrier signal and to modulate the carrier signal according to data to be transmitted; an electromagnetic compatibility (EMC) filter coupled to said NFC module via output terminals of said NFC module; and an antenna circuit coupled to and driven by said NFC module with the modulated carrier signal; said NFC module including a powered by the field (PBF) circuit adapted to harvest energy from an external field to power said device; said powered by the field circuit having a first terminal coupled to a first terminal of said EMC filter via a first impedance block and a second terminal coupled to a second terminal of said EMC filter via a second impedance block; wherein said first impedance block includes a first impedance element external to the NFC module; wherein said second impedance block includes a second impedance element external to the NFC module; said device being adapted to be able to operate in a powered by the field card mode. - View Dependent Claims (7, 21, 22, 23, 24, 25, 26)
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16-20. -20. (canceled)
Specification