HYBRID TAG FOR RADIO FREQUENCY IDENTIFICATION SYSTEM
First Claim
1. A method for reading data from a tag device, the method comprising:
- capturing an optical clock signal transmitted from an interrogator device to the tag device;
converting the optical clock signal into an electrical clock signal which represents the optical clock signal;
utilizing the electrical clock signal to control state machine control circuitry on the tag device; and
generating a regulated supply voltage from the electrical clock signal, wherein the regulated supply voltage is utilized as a bias voltage for powering the state machine control circuitry and other components of the tag device,wherein the capturing, converting, utilizing, and generating steps are performed by the tag device.
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Accused Products
Abstract
RFID (radio frequency identification) systems are provided in which tag and interrogator devices implement a hybrid framework for signaling including an optical transmitter/receiver system and an RF transmitter/receiver system. For instance, an RFID tag device includes: optical receiver circuitry configured to receive an optical signal having an embedded clock signal from an interrogator device, and convert the optical signal into an electrical signal comprising the embedded clock signal; clock extraction circuitry configured to extract the embedded clock signal from the electrical signal, and output the extracted clock signal as a clock signal for controlling clocking functions of the tag device; voltage regulator circuitry configured to generate a regulated supply voltage from the electrical signal, wherein the regulated supply voltage is utilized as a bias voltage for components of the tag device; and data transmitter circuitry configured to wirelessly transmit tag data to the interrogator device.
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Citations
20 Claims
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1. A method for reading data from a tag device, the method comprising:
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capturing an optical clock signal transmitted from an interrogator device to the tag device; converting the optical clock signal into an electrical clock signal which represents the optical clock signal; utilizing the electrical clock signal to control state machine control circuitry on the tag device; and generating a regulated supply voltage from the electrical clock signal, wherein the regulated supply voltage is utilized as a bias voltage for powering the state machine control circuitry and other components of the tag device, wherein the capturing, converting, utilizing, and generating steps are performed by the tag device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for reading data from a tag device, comprising:
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receiving a pulsed optical signal from an interrogator device, wherein the received pulsed optical signal comprises an embedded clock signal which is optically transmitted from the interrogator device to control clocking functions of the tag device; converting the pulsed optical signal into an electrical signal which represents the embedded clock signal within the pulsed optical signal; extracting the embedded clock signal from the electrical signal; utilizing the extracted clock signal as a clock signal for controlling the clocking functions of the tag device, wherein the receiving, converting, extracting, and utilizing steps are performed by the tag device. - View Dependent Claims (10, 11)
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12. A tag device, comprising:
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a substrate comprising components integrally formed thereon, wherein the components comprise; state machine control circuitry configured to control functions of the tag device; a non-volatile memory configured to store tag data; optical receiver circuitry configured to capture an optical clock signal transmitted from an interrogator device, and convert the optical clock signal into an electrical signal which is utilized to generate a clock signal, which represents the optical clock signal, to control clocking functions of the tag device, and to generate power for operating the components of the tag device; clock extraction circuitry configured to generate the clock signal from the electrical signal output from the optical receiver circuitry, which is utilized for controlling the clocking functions of the tag device; voltage regulator circuitry configured to generate a regulated supply voltage from the electrical signal output from the optical receiver circuitry, wherein the regulated supply voltage is utilized as a bias voltage for the components of the tag device; and data transmitter circuitry configured to wirelessly transmit the tag data to the interrogator device. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification