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RFID tag capable of modifying internal operations for a sensed environment

  • US 8,115,632 B1
  • Filed: 02/12/2009
  • Issued: 02/14/2012
  • Est. Priority Date: 02/14/2008
  • Status: Active Grant
First Claim
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1. A semiconductor chip for an RFID tag, comprising:

  • a wireless transceiver;

    at least one sub-circuit comprising one of a random number generator, a demodulator receive path, a nonvolatile memory bank, a modulator, an encryptor, a decryptor, an oscillator, a sense amplifier, a rectifier, and a charge pump; and

    a processing block circuitry configured to;

    receive, from a reader, an instruction encoded in a TUNE command, the instruction associated with an aspect of an environment sensed by the reader, andexecute the instruction causing circuitry coupled to a power management unit to perform at least one of;

    turn the at least one sub-circuit on,turn the at least one sub-circuit off,alter a bias current within the at least one sub-circuit,alter a bias voltage within the at least one sub-circuit, andadjust a threshold within the at least one sub-circuit.

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