RADIO FREQUENCY IDENTIFICATION TAGS HAVING RECHARGEABLE BATTERY FUNCTION

摘要

PURPOSE: An RFID(Radio Frequency ID) tag device equipped with a charge function is provided to recognize the RFID tag in a long distance and prevent the reducing of the recognition ratio due to the shortage of the electric power supply. CONSTITUTION: A charge unit(220) charges the specified voltage. The DC power supply unit (211) generates the power source from the RF signal. A block unit(214) connects/blocks the power source between the DC power supply and the power supply unit. An over voltage prevention part(215) is connected in the output terminal of the DC power supply and connected in parallel with the charge unit to prevent the over voltage of the charge unit. The power supply unit is connected to the output terminal of the DC power supply. The charge unit is charged with the power source generated from the DC power supply unit and the 'the external power source generated from the power supply unit.