Method of checking the matching of an antenna connected to a NFC component and corresponding NFC component
First Claim
1. An NFC component comprising:
- a first interface that can be used in reader mode and is configured to be connected to an antenna via an external impedance matching circuit;
a second interface that can be used in card mode and in reader mode and is configured to be connected to the antenna and to the first interface via the impedance matching external circuit; and
an internal module comprising a first detection circuit configured to deliver a first detection signal having a first state when a position of a rising edge of a first voltage signal at the first interface is located inside a time window of a resulting second voltage signal at the second interface.
2 Assignments
0 Petitions
Accused Products
Abstract
An NFC component includes a first interface that can be used in reader mode and is configured to be connected to an antenna via an impedance matching external circuit. A second interface can be used in card mode and in reader mode and is configured to be connected to the antenna and to the first interface via the impedance matching external circuit. An internal module includes a first detection circuit configured to deliver a first detection signal that represents the phase antenna matching quality when the impedance matching external circuit and the antenna are indeed connected between the first interface and the second interface. The internal module is further configured to deliver a check signal from at least the first detection signal.
8 Citations
28 Claims
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1. An NFC component comprising:
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a first interface that can be used in reader mode and is configured to be connected to an antenna via an external impedance matching circuit; a second interface that can be used in card mode and in reader mode and is configured to be connected to the antenna and to the first interface via the impedance matching external circuit; and an internal module comprising a first detection circuit configured to deliver a first detection signal having a first state when a position of a rising edge of a first voltage signal at the first interface is located inside a time window of a resulting second voltage signal at the second interface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of checking matching of an antenna, connected via an external impedance matching circuit to a first interface of an NFC component that can be used in reader mode and connected to a second interface of the NFC component that can be used in card mode and in reader mode, the method comprising:
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generating a detection signal within the NFC component, the detection signal having a first state when a position of a rising edge of a first voltage signal at the first interface is located inside a time window of a resulting second voltage signal at the second interface, the first state indicative of a phase antenna matching quality; and generating a check signal based upon the detection signal. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
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28. An apparatus comprising:
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a first interface that can be used in reader mode and a second interface that can be used in card mode and in reader mode; an antenna coupled to the second interface and coupled via an external impedance matching circuit to the first interface; means for generating a detection signal having a first state when a position of a rising edge of a first voltage signal at the first interface is located within a time window of a resulting second voltage signal at the second interface, the first state being indicative of a phase antenna matching quality; and means for generating a check signal based upon the detection signal.
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Specification