Power management in radio frequency devices
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United States of America Patent
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N/A
Issued Date -
May 1, 2008
app pub date -
Oct 30, 2007
filing date -
Oct 31, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention is directed to an improved RFID system. The system provides a tag having a power management unit that selectively powers a transmission unit to transmit at least a first signal having a first frequency. The tag can be configured to transmit a second signal having a second frequency as well. The power management unit selectively powers the transmission unit based on the level of power stored in the tag, a duty cycle associated with the tag, or a combination of the two.
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