Use of a subcarrier in an organic semiconductor radio...

Details Use of a subcarrier in an organic semiconductor radio... Use of a subcarrier in an organic semiconductor radio...

2006-06-27

2006-06-27

Lee, Benjamin C. (Department: 2632)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S870030, C340S870030, C340S870030, C375S275000, C375S326000, C375S335000

Reexamination Certificate

active

07068169

ABSTRACT:
A radio frequency identification system comprising a radio reader circuit operable to emit a radio frequency carrier signal modulated with a subcarrier, which has a subcarrier modulation rate. The radio frequency identification tag circuit is operable to extract the subcarrier from the emitted radio frequency carrier signal and the extracted subcarrier then functions as a clock, which operates to assist in the transfer of a modulated backscattered signal to the radio frequency identification reader circuit. The radio frequency identification reader circuit decodes the modulated backscattered signal and the data encoded in the radio frequency identification tag circuit is obtained.

REFERENCES:
patent: 5345231 (1994-09-01), Koo et al.
patent: 6084530 (2000-07-01), Pidwerbetsky et al.
patent: 6133835 (2000-10-01), De Leeuw et al.
patent: 6204764 (2001-03-01), Maloney
patent: 6456668 (2002-09-01), MacLellan et al.

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