| US 7,525,436 B2 | ||
| Methods and apparatus for reducing power consumption of an active transponder | ||
| Marlin H. Mickle, Pittsburgh, Pa. (US); Peter J. Hawrylak, Woodstown, N.J. (US); Raymond R. Hoare, Pittsburgh, Pa. (US); Alex Jones, Pittsburgh, Pa. (US); James T. Cain, Pittsburgh, Pa. (US); Chuba Oyolu, Pittsburgh, Pa. (US); and Shenchih Tung, Pittsburgh, Pa. (US) | ||
| Assigned to University of Pittsburgh-Of the Commonwealth System of Higher Education, Pittsburgh, Pa. (US) | ||
| Filed on Nov. 20, 2006, as Appl. No. 11/561,595. | ||
| Application 11/561595 is a continuation in part of application No. 11/408774, filed on Apr. 21, 2006, granted, now 7,375,637. | ||
| Claims priority of provisional application 60/739577, filed on Nov. 23, 2005. | ||
| Claims priority of provisional application 60/673715, filed on Apr. 21, 2005. | ||
| Prior Publication US 2007/0176752 A1, Aug. 02, 2007 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. G08B 13/14 (2006.01); H04Q 5/22 (2006.01) | ||
| U.S. Cl. 340—572.1 [340/10.33; 340/10.34] | 16 Claims |
| 1. A method of managing power consumption in a transponder having a plurality of circuits including at least a first circuit
having a first active state requiring at least a first level of power, and a second circuit having a second active state requiring
at least a second level of power, wherein said second level of power is greater than said first level of power, the method
comprising:
receiving a reader signal sent by a reader device in said first circuit;
determining in said first circuit, based on information included in said reader signal, whether said reader signal requires
one of said plurality of circuits other than said first circuit to operate; and
causing said first circuit to provide a wake-up signal to said second circuit and causing said first circuit to provide said
reader signal to said second circuit if it is determined that said reader signal requires one of said plurality of circuits
other than said first circuit to operate, said wake-up signal causing said second circuit to move from an inactive state to
said second active state.
|