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, wherein a period of the electrical clock signal is equal to a period of 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.
90 Citations
17 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, wherein a period of the electrical clock signal is equal to a period of 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 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; clock extraction circuitry configured to generate g clock signal from the electrical signal output from the optical receiver circuitry, wherein the clock signal is utilized for controlling clocking functions of the tag device, and wherein a period of the clock signal is equal to a period of the optical clock signal; 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 (10, 11, 12, 13, 14, 15, 16, 17)
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Specification