| 摘要 |
The antenna of an RFID tag (100) is disconnected from the balance of the RFI D chip by means of a series switch (24) activated in response to a logic command, CLOAK. Activation of the switch (24) disconnect s the antenna (16) of the RFID tag for the remainder of the chip and effects a high impedance resistance across the antenna terminal s (12, 14). An RC circuit (36, 38) is charged by activation of the CLOAK signal and thereafter discharges during a predetermined time perio d as determined by a high impedance series antifuse leakage transistor (34). The antenna is thus disconnected for a time sufficient to allow the remaining RFID tags to be identified.
|
