RFID tag

摘要

An RF tag in a wireless communication system which can operate normally even when a communication distance is extremely short, for example if the RF tag is in contact with a reader/writer, whereby the reliability is improved. The RF tag (100) which communicates data by wireless communication includes a comparison circuit (12) which compares electric power (VIN) supplied from outside with reference electric power (V-BIAS) and a protection circuit portion (10) which is operated when the electric power supplied from outside is higher than the reference electric power in the comparison circuit (12).