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US 7,843,345 B2Granted
Dual frequency RFID circuit
AssigneeTexas Instruments Incorporated
InventorSteve Charles Lazar
Life of this patent
Estimating the term…
Abstract
A radio frequency identification (RFID) transponder (FIGS. 4 and 5A) is disclosed. The transponder includes first (RF) and second (GND) terminals. A first resonant circuit (500, 504, 508) is connected between the first and second terminals. A second resonant circuit (502, 504, 508) has a second resonant frequency different from the first resonant frequency and is connected between the first and second terminals.
Claims17
A radio frequency identification transponder, comprising:
- a first terminal;
- a second terminal;
- a first resonant circuit having a first resonant frequency and connected between the first and second terminals;
- and
- a second resonant circuit having a second resonant frequency different from the first resonant frequency and connected between the first and second terminals.
2 more elements
A radio frequency identification transponder, comprising:
- a first terminal;
- a second terminal;
- a third terminal;
- a processor connected to the first, second, and third terminals;
- a first resonant circuit having a first resonant frequency and connected between the first and third terminals;
- and
- a second resonant circuit having a second resonant frequency different from the first resonant frequency and connected between the second and third terminals.
4 more elements
Dependencies are inferred from the claim text.