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...http://www.google.com.au/patents/US20100033310?utm_source=gb-gplus-sharePatent US20100033310 - POWER NEGOTATION FOR SMALL RFID CARD
