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United States of America Patent
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app pub date -
Dec 18, 2009
filing date -
May 6, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A circuit tracks the total amount of time that a host device has spent in its high power “activated” state (an optionally idle and hibernate states) and thereby can estimate the total power consumed by the tag. A remote device can query the state of a counter storing a value representing this time to accurately determine how much of the energy has been consumed by the host device and how much time is left and/or how many more operations can be performed before the host device's battery is exhausted.
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