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US 8,410,936 B2Granted
Contactless card that receives power from host device
AssigneeTyfone, Inc.
InventorsSiva G. Narendra, Saurav Chakraborty, Prabhakar Tadepalli
Life of this patent
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Abstract
A memory card compatible 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. Commands may be sent to the RFID card to keep the RFID card powered.
Claims20
A card comprising:
- a memory card slot interface;
- a memory card controller coupled to the memory card slot interface;
- a contactless communications device coupled to the memory card controller, the contactless communications device having an antenna port;
- a power delivery mechanism to deliver power to the contactless communications device from the memory card slot interface;
- and
- a coil coupled to the antenna port of the contactless communications device.
3 more elements
A memory card comprising:
- a memory card controller to communicate with a host;
- a smartcard controller having an antenna port;
- and
- an inductive element coupled to the antenna port, wherein the inductive element is too small to provide sufficient energy to power the smartcard controller;
- wherein the smartcard controller is coupled to receive power from the host.
2 more elements
A mobile payment device comprising:
- a coil to inductively couple with an interrogating radio frequency field transmitted by a mobile payment reader;
- a dual interface smartcard controller having an antenna port coupled to the coil, the dual interface smartcard controller further coupled to receive power from other than the antenna port;
- a memory card controller coupled to communicate with the dual interface smartcard controller;
- and
- a memory card compatible circuit board upon which the coil, the dual interface smartcard, and the memory card controller are mounted.
2 more elements
Dependencies are inferred from the claim text.