Methods and Apparatus for Switching a Transponder to an Active State, and Asset Management Systems Employing Same
A transponder that may be used as an RFID tag includes a passive circuit to eliminate the need for an "always on" active RF receiving element to anticipate a wake-up signal for the balance of the transponder electronics. This solution allows the entire active transponder to have all circuit elements in a sleep (standby) state, thus drastically extending battery life or other charge storage device life. Also, a wake-up solution that reduces total energy consumption of an active transponder system by allowing all non-addressed transponders to remain in a sleep (standby) state, thereby reducing total system or collection energy. Also, the transponder and wake-up solution are employed in an asset tracking system.
MICKLE MARLIN H [US]; JONES ALEX K [US]; CAIN JAMES T [US]; HAWRYLAK PETER J [US]; MARX FRANK [US]; HOARE RAYMOND R [US]
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