US 9,313,559 B2Granted

Automatic mode detection in a dual operating mode RFID tag

AssigneeAmtech Systems, LLC

InventorsKelly Gravelle, Robert W. Tiernay, Dale L. Scott, Charles A. Johnson, Filip Weytjens, Matthew K. Burnett

Life of this patent

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Abstract

A multi-mode, preferably dual mode, radio frequency identification (RFID) tag is adapted for automatic detection of whether a RFID reader located within communication range of the RFID tag is transmitting a continuous wave (CW) or modulated wave types of RF signal, and accordingly, mandating a response from the tag in read-only (RO) mode or read/write (R/W) mode, respectively. The tag includes means for designating one of the RO and R/W operating modes as a default mode of the tag, and for switching the tag from its default mode to its other operating mode, and vice versa, according to a rule for determining the frequency of occurrence of a selected event related to signal type of the reader. A device-implemented method of this automatic detection, and a method of fabricating the tag, are also disclosed.

Claims14

Dependent claims

A factory-configurable RFID transponder-comprising:

a receiver configured for receiving a continuous wave RF signal and a modulated RF signal a logic circuit configured to be capable of detecting whether said receiver is receiving said continuous wave RF signal or said modulated RF signal and to cause the RFID transponder to transmit a first response if said continuous wave signal is detected and a second response if said modulated signal is detected and wherein said logic circuit is further configured to be capable of receiving an input designating either one of said continuous wave RF signal and said modulated RF signal as a dominant mode and the other one of said continuous wave RF signal and said modulated RF signal as a recessive mode;
and wherein said logic circuit is further configured to be capable of operating according to rules for transition from said dominant mode to said recessive mode, wherein said rules can be configured to be more or less stringent at the factory.

Dependencies are inferred from the claim text.

Facts

Application: 14/090,419Filed 26 Nov 2013 · continuation
Priority: 31 May 2005
Published: US 2014/0167925 A119 Jun 2014
Granted: 12 Apr 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

G06K 7/10198
Sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves: setting parameters for the interrogator, e.g.…
G06K 19/0707
At least one of the integrated circuit chips comprising an arrangement for power management: the arrangement being capable of collecting energy…
G06K 19/0712
At least one of the integrated circuit chips comprising an arrangement for power management: the arrangement being capable of triggering distinct…
G06K 19/0723
With integrated circuit chips: the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on…

Family

Application11/139,681Parent of this continuation · filed 31 May 2005
Application13/468,371Parent of this continuation · filed 10 May 2012
US 8,198,985 B2Parent of this continuation · filed 12 Jun 2012
US 2014/0167925 A1Pre-grant publication · published 19 Jun 2014
US 8,618,916 B2Parent of this continuation
US 2006/0267736 A1Published application
US 2012/0306627 A1Published application
US 9,313,559 B2This patent

From the US filing history. Foreign family members aren’t listed.