Computing device with NFC and active load modulation for mass transit ticketing
First Claim
Patent Images
1. A computing device comprising:
- a smartcard controller;
an inductive element to interact with a near field communication (NFC) reader, wherein the inductive element is too small to power the smartcard controller when placed in an interrogating radio frequency field; and
an active transmit driver coupled between the smartcard controller and the inductive element to transmit digital data for mass transit ticketing.
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Abstract
An RFID card includes a smartcard controller that receives power from a host device. The RFID card also includes a small inductive device capable of inductive coupling with an RFID reader. The small inductive device is small enough to fit in the form factor of a memory card or SIM card. Enhancement circuits enhance the usable read and write distance of the RFID card.
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Citations
20 Claims
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1. A computing device comprising:
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a smartcard controller; an inductive element to interact with a near field communication (NFC) reader, wherein the inductive element is too small to power the smartcard controller when placed in an interrogating radio frequency field; and an active transmit driver coupled between the smartcard controller and the inductive element to transmit digital data for mass transit ticketing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A computing device comprising:
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a smartcard controller; an inductive element to interact with a near field communication (NFC) reader, wherein the inductive element is too small to power the smartcard controller when placed in an interrogating radio frequency field; and a load modulation circuit coupled between the smartcard controller and the inductive element to transmit digital data for mass transit ticketing. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A computing device comprising:
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a smartcard controller; an inductive element to interact with a near field communication (NFC) reader, wherein the inductive element is too small to power the smartcard controller when placed in an interrogating radio frequency field; and a performance enhancement circuit coupled between the smartcard controller and the inductive element, the performance enhancement circuit including a load modulation driver circuit to drive the inductive element to transmit digital data for mass transit ticketing. - View Dependent Claims (17, 18, 19, 20)
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Specification