Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2011-01-04
2011-01-04
Nguyen, Hung T. (Department: 2612)
Communications: electrical
Condition responsive indicating system
Specific condition
C340S572300, C340S572400, C340S571000, C340S539100, C340S539130, C340S870030, C340S010340
Reexamination Certificate
active
07864051
ABSTRACT:
A quasi-passive wake-up function for an electronic device that employs a continuous low power standby mode compares a received signal to a predetermined signal and wakes up the device when the received signal is the same as the predetermined signal. An electronic device having a quasi-passive wakeup function includes a receiver for receiving at least one stimulus signal, a comparator for comparing the received signal to a predetermined signal, and at least one logic gate for waking up the electronic device when the received stimulus signal is the predetermined signal. In one application, identification tags are used to distinguish a unique tagged item from among a plurality of items with a similar appearance. When an interrogation signal is not present, the tags sleep at a very low power level.
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Lippman Andrew Benjamin
Ma Hongshen
Paradiso Joseph A.
Henderson Norma E.
Massachusetts Institute of Technology
Nguyen Hung T.
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