RF SIM CARD, RF CARD READER, AND MAGNETIC INDUCTION CONTROL METHOD IN RF COMMUNICATION

摘要

THE PRESENT INVENTION INVOLVES AN RF SIM CARD (100), AN RF CARD READER (200), AND MAGNETIC INDUCTION CONTROL METHODS IN RF COMMUNICATION. THE RF SIM CARD (100) INCLUDES A SIM CARD CORE (106), A FIRST RF TRANSCEIVER MODULE (101), A FIRST RF ANTENNA (102) AND A FIRST MICROCONTROLLER (103), AND A MAGNETIC INDUCTION MODULE (108). WHEN THE MAGNETIC INDUCTION MODULE (108) DOES NOT RECEIVE A MATCHING MAGNETIC FIELD SIGNAL, THE FIRST RF TRANSCEIVER MODULE (101) AND THE FIRST MICROCONTROLLER (103) ARE BOTH IN A DORMANT STATE. WHEN THE MAGNETIC INDUCTION MODULE (108) RECEIVES A MAGNETIC FIELD SIGNAL GENERATED BY THE MAGNETIC FIELD GENERATION MODULE (208), THE RECEIVED MAGNETIC FIELD SIGNAL IS CONVERTED TO AN ELECTRICAL SIGNAL TO ACTIVATE THE FIRST RF TRANSCEIVER MODULE (101). THE FIRST RF TRANSCEIVER MODULE (101) SUBSEQUENTLY EXAMINES WHETHER AN RF MODULATION SIGNAL EXISTS TO DETERMINE WHETHER TO GENERATE AN EXTERNAL INTERRUPTION TO WAKE UP THE FIRST MICROCONTROLLER (103), AND FURTHER ENTERS A NORMAL WORKING STATE TO EXCHANGE DATA WITH THE RF CARD READER (200). THE PRESENT INVENTION GREATLY REDUCES THE POWER CONSUMPTION OF THE SIM CARD (100), AND EFFECTIVELY CONTROLS THE RF COMMUNICATION RANGE AND AVOIDS READ ERROR AND UNINTENDED READING. FIG. 1