High Sensitivity RFID TAG Integrated Circuits
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United States of America Patent
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Issued Date -
Mar 1, 2007
app pub date -
Jul 22, 2006
filing date -
Jul 22, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method and apparatus for an ultra-high sensitivity, low cost, passive (no battery) low-power energy harvesting data transmitting circuit energy, such as a RFID (Radio Frequency IDentification) tag integrated circuit 'chip.' By using combinations of special purpose design enhancements, the low-power energy harvesting passive data transmitting circuit, such as the RFID tag chip, operates in the sub-microwatt power range. The chip power should be derived from a low-microwatt per square centimeter RF field radiated to the RFID tag antenna from the tag reader (interrogator) or derived from a suitable low signal source, such as a sonic transducer (e.g., a piezoelectric transducer or a low level DC source, such as a bimetallic or chemical source).
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