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US 2009/0289768 A1Published application
Rfid system and rfid tag thereof
AssigneeNational Taiwan University of Science and Technology
InventorYao-Yi Tseng
Life of this patent
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Abstract
An RFID tag is provided. The RFID tag includes an emitting module, a temperature detecting circuit and a tag chip. The temperature detecting circuit produces a time signal according to a surrounding temperature, wherein the time signal changes with the surrounding temperature. The tag chip is electrically connected to the temperature detecting circuit and the emitting module, wherein the time signal is transmitted via the emitting module.
Claims19
An RFID system, comprising:
- an RFID tag, comprising:
- an emitting module;
- a temperature detecting circuit, producing a time signal according to a surrounding temperature;
- and
- a tag chip, electrically connected to the temperature detecting circuit and the emitting module, wherein the time signal is transmitted via the emitting module;
- and
- a reader, comprising:
- a reader antenna, receiving the time signal;
- a transforming circuit, receiving the time signal from the reader antenna, and transforming the time signal into a temperature signal;
- and
- a control circuit, electrically connected to the transforming circuit and the reader antenna.
8 more elements
An RFID tag, comprising:
- an emitting module;
- a temperature detecting circuit, producing a time signal according to a surrounding temperature, wherein the time signal changes with the surrounding temperature;
- and
- a tag chip, electrically connected to the temperature detecting circuit and the emitting module, wherein the time signal is transmitted via the emitting module.
1 more element
Dependencies are inferred from the claim text.