Method and apparatus for controlled persistent ID flag for...

Details Method and apparatus for controlled persistent ID flag for... Method and apparatus for controlled persistent ID flag for...

2007-05-08

2007-05-08

Lieu, Julie Bichngoc (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S644000, C340S664000, C340S572100, C365S189011, C365S204000, C711S100000, C711S103000

Reexamination Certificate

active

10887617

ABSTRACT:
A Radio-Frequency Identification (RFID) transponder is provided. The RFID transponder may include a basic ID flag circuit having a VDD voltage node, an output voltage node, and a capacitor coupled to the VDD voltage node and the output voltage node to store an ID flag. A supplemental discharge current circuit coupled to the basic ID flag circuit is provided in order to control persistence duration of the state of the ID flag. The persistence duration of the state of the ID flag is controlled by maintaining supplemental discharge current, which is greater than the leakage current of the basic ID flag circuit.

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EPC Radio-Frequency Identity Protocols Generation 2 Identity Tag (Class 1): Protocol for Communications at 860 MHz-960Mhz, Last-Call Working Draft Version 1.0.2, Nov. 24, 2003, 66 pages.

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