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US 10,318,855 B2Granted
Computing device with NFC and active load modulation for mass transit ticketing
AssigneeTyfone, Inc.
InventorsSiva G. Narendra, Saurav Chakraborty, Prabhakar Tadepalli
Life of this patent
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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.
Claims20
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.
1 more element
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
- a load modulation circuit coupled between the smartcard controller and the inductive element to transmit digital data for mass transit ticketing.
1 more element
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
- 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.
1 more element
Dependencies are inferred from the claim text.