| 摘要 |
<p>PURPOSE: To supply electric power between both fixed and portable units by magnetic coupling and to transmit encoded information in avoiding mutual interference by arranging transmission and reception coils of the fixed and the portable units with a bias. CONSTITUTION: Fixed and the portable units 44, 56 are provided with respective transmission, reception coils 48, 54 and 60, 58, and a magnetic field BF1 with a magnetic flux 50 is generated by flowing the electric current iF1 to the coil 48 by a drive AC current source 46. The generated electric power is supplied to a code transmitter as a clock F1 and DC voltage by the coil 58 in the magnetic field BF1 and a magnetic field BF2 with a magnetic flux 62 by a coil 60 by flowing electric current iF2 to the coil 60 by a card ASIC. The electric power flows through the coils 54, 58 by arranging the coils 48, 54 and 60, 58 with a bias. The mutual interference is removed by forming respective halves of the pieces of magnetic fluxes 50, 62 in the opposite directions. Consequently, the electric power is supplied, and the encoded information is transmitted/ received between the units by the magnetic fluxes.</p> |
