The claw king circuit and the reliability of question which are utilized with the radio frequency identification through the mannered null antenna which conceals the RFID tag

摘要

(57) Abstract The antenna of the RFID tag (100), responding to logical command CLOAK, is cut off from the balance circuit of the RFID tip/chip by the serial switch (24) which is activated. By the activation of the switch (24), the antenna (16) of the RFID tag is cut off from the other part of the RFID tip/chip, in the antenna terminal (12,14) high impedance resistance occurs. The RC circuit (36,38) being charged by the activation of the CLOAK signal, discharges the predetermined time which is decided after that, by the high impedance serial anti fuse leak transistor (34) between. Therefore, the antenna is made between no connection of the sufficient time when the remaining RFID tag is identified.