| 摘要 |
PROBLEM TO BE SOLVED: To set an optimum response level corresponding to a use environment as the response level of an ID tag. SOLUTION: A power signal received by a resonator is rectified by a smoothing part 10 and therefore used for operation power voltage. When MPU 13 of an IC chip 11 receives a command comprising a response level from an interrogator, prescribed tag information is transmitted by turning on/off a switching circuit 22 in a state where commanded resistance is connected to the switching circuit 22 among plural resistances 20a to 20c. The response level is set in accordance with the selected resistances 20a to 20c and a noise resistant level and a maximum communication distance are decided in accordance with the response level. Thus, communication can be realized in the optimum response level corresponding to the noise resistant level and the maximum communication distance by selecting the response level in accordance with the use environment. |
