RADIO-FREQUENCY IDENTIFICATION TAG WITH OSCILLATOR CALIBRATION
First Claim
Patent Images
1. A Radio-Frequency Identification (RFID) tag comprising:
- an antenna; and
an integrated circuit coupled to the antenna, comprising;
an oscillator; and
a tag controller to select a selected calibration value, from a plurality of calibration values stored within a memory structure, according to a first selection criterion, each of the calibration values corresponding to a respective oscillation frequency of the oscillator, and the oscillator being operationally calibrated utilizing the selected calibration value.
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Abstract
A method of calibrating an oscillator within a Radio-Frequency Identification (RFID) tag includes storing a plurality of calibration values within a memory structure. Each of the calibration values corresponds to a respective oscillation frequency of the oscillator. A selected calibration value is selected from the plurality of calibration values stored, according to a first selection criterion. The oscillator is then calibrated in accordance with the selected calibration value.
52 Citations
31 Claims
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1. A Radio-Frequency Identification (RFID) tag comprising:
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an antenna; and
an integrated circuit coupled to the antenna, comprising;
an oscillator; and
a tag controller to select a selected calibration value, from a plurality of calibration values stored within a memory structure, according to a first selection criterion, each of the calibration values corresponding to a respective oscillation frequency of the oscillator, and the oscillator being operationally calibrated utilizing the selected calibration value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 17, 18, 19, 20)
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11. A method for calibrating an oscillator within a radio-frequency identification (RFID) tag, the method comprising:
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storing a plurality of calibration values within a memory structure associated with the RFID tag, each of the calibration values corresponding to a respective oscillation frequency of the oscillator;
selecting a selected calibration value, from the plurality of calibration values stored within the memory structure, according to a first selection criterion; and
calibrating the oscillator in accordance with the selected calibration value. - View Dependent Claims (12, 13, 14, 15, 16)
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21. A radio-frequency identification (RFID) tag comprising:
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antenna means; and
integrated circuit means coupled to the antenna means, comprising;
first means for selecting a selected calibration value, from a plurality of calibration values stored within a memory structure associated with the RFID tag, according to a first selection criterion; and
second means for generating a frequency signal in accordance with the selected calibration value. - View Dependent Claims (22, 23, 24, 25)
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26. A machine-readable medium storing a description of an RFID tag, the RFID tag comprising:
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an antenna; and
an integrated circuit coupled to the antenna, comprising;
an oscillator; and
a tag controller to select a selected calibration value, from a plurality of calibration values stored within a memory structure, according to a first selection criterion, each of the calibration values corresponding to a respective oscillation frequency of the oscillator of the RFID tag, and the oscillator being operationally calibrated utilizing the selected calibration value. - View Dependent Claims (27, 28, 29, 30, 31)
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Specification