RFID device with multiple passive operation modes
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United States of America Patent
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Aug 31, 2010
Grant Date -
Jun 11, 2009
app pub date -
Dec 11, 2007
filing date -
Dec 11, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
A radio frequency identification (RFID) device is capable of operating in multiple passive modes, in either a fully passive mode or a boosted passive mode. The device includes an RFID chip that is suitable for operation of passive RFID devices. An antenna is coupled to the chip for receiving radio frequency signals, such as those sent by a reader/detector device. In addition, the RFID device has an energy booster which may be used to boost the energy of signals received by the device, in order to enable operation at a reduced level of RF signal. The energy boost may be selectively applied in order to transform the passive RFID device into operating in a boosted passive mode. The energy booster may include a one-port transistor and an energy source that is used to power the transistor. The energy source may be a rechargeable energy source.
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