| 摘要 |
PROBLEM TO BE SOLVED: To provide a non-contact IC card capable of correcting a dispersion of a resonance frequency without using a physical means such as cutting of wiring. SOLUTION: The non-contact IC card 10 is provided with a resonance circuit 11 the resonance frequency of which is corrected and a rectifier circuit 12 rectifying reception signals received from a reader-writer 21 by the resonance circuit 11 and supplying a DC voltage. The non-contact IC card 10 is provided with a correction capacitance C2 for correcting a tuning capacitance C1 in the resonance circuit 11, a transistor for correcting the tuning capacitance in the resonance circuit 11 by switching the correction capacitance C2, a shunt regulator 13 for detecting the DC voltage supplied from the rectifier circuit 12 when the tuning capacitance in the resonance circuit 11 is corrected by the transistor, and a CPU 14 for deciding the tuning capacitance in the resonance circuit 11 so as to maximize the DC voltage detected by the shunt regulator. |
