Piezo-based circuit for modifying functionality of rfid tags
AssigneeHand Held Products, Inc.
InventorsSridhar RAVILLA, Kailash Kashyap GODAWARTHY, Pankaj Kumar PANDEY
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Abstract
A radio frequency identification (RFID) tag comprising a tag integrated circuit (IC), an antenna coupled to the tag IC, and an impedance tuned circuit coupled to the antenna, wherein the impedance tuned circuit configured to tune a circuit impedance of the antenna based on power received by the impedance tuned circuit. The RFID tag further comprises a piezo electric energy harvesting module coupled to the impedance tuned circuit, wherein the piezo electric energy harvesting module is configured to supply the power to the impedance tuned circuit.
Claims15
A radio frequency identification (RFID) tag comprising:
- a tag integrated circuit (IC);
- an antenna coupled to the tag IC;
- an impedance tuned circuit coupled to the antenna, the impedance tuned circuit configured to tune a circuit impedance of the antenna based on power received by the impedance tuned circuit;
- and
- a piezo electric energy harvesting module coupled to the impedance tuned circuit, the piezo electric energy harvesting module configured to supply the power to the impedance tuned circuit.
A radio frequency identification (RFID) tag comprising:
- an antenna configured to receive and transmit radio frequency (RF) signals;
- a tag integrated circuit (IC) coupled to the antenna, the tag IC comprising an input/output (I/O) port, and the tag IC is configured to generate discrete signals for transmission in the RF signals based on electric signals received on the I/O port;
- and
- a piezo electric energy harvesting module coupled to the I/O port, the piezo electric energy harvesting module configured to generate the electric signals to the I/O port.
Dependencies are inferred from the claim text.