| 摘要 |
PURPOSE:To obtain the IC card of a complete non-contact by obtaining a supply of a power source into an IC card from the induced current of a non-contact, and also sending and receiving the information by an external terminal using light emitting/light receiving diodes. CONSTITUTION:An IC card 1 is loaded with an integrated circuit (IC) 3 consisting of a recording medium and a microprocessor, and provided with an external terminal 4 for connecting this circuit and an external information equipment, a secondary coil 5 for inducing a current by an induced electric field from the external information apparatus, and a rectifying circuit 2 for rectifying a current induced by the secondary coil 5. On both faces of a substrate 12, a wiring 51 of the secondary coil 5 is printed in a shape of a loop. The IC 3 is connected to driving circuits 42, 43 by a wiring 13, and the driving circuits 42, 43 drive a light receiving diode 41 and a light emitting diode 44. Also, a current which has been induced in a loop-shaped wiring is rectified and used as a power source, and input/output information of the IC card is sent and received to and from the outside by an optical coupling system by the light emitting and photodetecting diodes. |
