Inventors:
Marlin H. Mickle - Pittsburgh PA, US
Alex K. Jones - Pittsburgh PA, US
James T. Cain - Pittsburgh PA, US
Peter J. Hawrylak - Woodstown NJ, US
Frank Marx - Pittsburgh PA, US
Raymond R. Hoare - Pittsburgh PA, US
Assignee:
University of Pittsburgh - Of The Commonwealth System of Higher Education - Pittsburgh PA
International Classification:
G08B 13/14
US Classification:
3405724, 3405727, 3405728, 34053922, 34087001, 340 105, 235385, 235492, 343850, 343860, 343795
Abstract:
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.