RFID tag with separate transmit and receive clocks and related method
First Claim
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1. A method comprising:
- receiving an interrogation signal from a remote reader device;
measuring a power related parameter of said interrogation signal; and
adjusting a frequency of a transmit oscillator based on a measured value of said power related parameter to generate a transmit clock.
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Abstract
An RFID tag includes separate transmit and receive clocks. In at least one embodiment, the transmit clock frequency is adjusted based on an amount of power available to transmit a response signal to a reader.
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Citations
18 Claims
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1. A method comprising:
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receiving an interrogation signal from a remote reader device;
measuring a power related parameter of said interrogation signal; and
adjusting a frequency of a transmit oscillator based on a measured value of said power related parameter to generate a transmit clock. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus for use in an RFID tag, comprising:
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a power sensor to measure a power related parameter of a received interrogation signal; and
an adjustable-frequency transmit oscillator to adjust a transmit clock frequency of the RFID tag based on an output of said power sensor. - View Dependent Claims (10, 11, 12, 13)
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14. An RFID tag, comprising:
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a dipole antenna to receive an interrogation signal from a wireless channel;
a power sensor to measure a power related parameter of said received interrogation signal; and
an adjustable-frequency transmit oscillator to adjust a transmit clock frequency of the RFID tag based on an output of said power sensor. - View Dependent Claims (15, 16, 17, 18)
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Specification