Patent ID: 8237561
Filing Date: 2012-08-07
Classification: G06K,G08B,H01Q

Abstract:
1. A semi-active radio frequency identification (RFID) tag for communicating with the tag reader, said tag comprising: tag circuitry adapted to receive and store information pertaining to a person or object associated with said tag; an antenna for receiving and transmitting information signals relative to the tag reader; an on-board battery for powering said tag circuitry; and a power management system including a processor circuit for controllably coupling said on-board battery to enable selected limited portions of said tag circuitry sufficient to complete a communication protocol while prolonging battery service life; wherein said tag circuitry comprises a plurality of circuit blocks, said power management system controllably coupling specific ones of said circuit blocks to said on-board battery each for an individually controlled time interval sufficient to complete said communication protocol, and wherein said power management system is adapted for defaulting to a passive operation mode upon battery failure and for controllably coupling specific ones of said circuit blocks to an external power source sufficient to complete said communication protocol.