Mobile payment device with small inductive device powered by a host device
View Patent ↗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.
1. A mobile payment device comprising:
a small inductive device having 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 small inductive device, the dual interface smartcard controller, and the memory card controller are mounted.
2. The mobile payment device of claim 1 further comprising metallic contacts compatible with a memory card slot in a host device.
3. The mobile payment device of claim 1 wherein the dual interface smartcard controller is coupled to the metallic contacts to receive power from the host device.
4. The mobile payment device of claim 1 wherein the dual interface smartcard controller is coupled to receive power from the memory card controller.
5. The mobile payment device of claim 1 wherein the mobile payment device conforms to memory card size requirements of one of: Secure Digital (SD) cards, mini SD cards, and micro SD cards.
6. The mobile payment device of claim 5 further comprising nonvolatile memory coupled to the memory card controller.
7. The mobile payment device of claim 1 wherein the dual interface smartcard controller is operable to reflect signals received at substantially 13.56 MHz.