NON-CONTACT IC SYSTEM AND MOBILE TERMINAL

摘要

A non-contact IC system (1) is mounted in a case of a mobile telephone (100) and includes: an antenna coil (11); an IC module (12) for receiving power and communication information via the electric wave received by the antenna coil (11); a CPU (13) for controlling the entire system and controlling the drive power of the IC module (12); a regulator (14) for supplying the drive power to the IC module (12); a voltage detection circuit (15) for detecting power supplied via the antenna coil (11); a battery (16); a bus (17); and a switch (18). The CPU (13) controls the drive power of the IC module (12) according to the detection result of the power supplied via the antenna coil (11) and the communication state of the IC module (12). Thus, it is possible to provide a non-contact IC system and a mobile terminal capable of performing stable communication even when the power supply by the electromagnetic induction via the electric wave is very weak or instable.