Patent · US Expired

Method of identifying several transponders

US6674359B1 · kind B1 · utility

9Cited by

3References

3Claims

0Family size

Assignee

TEXAS INSTRUMENTS INCORPORATED · US

Inventors

Konstantin Aslanidis · Dachau, DE
Simon Atherton · Unterwattenbach, DE
Adolf Baumann · Ilsenburg, DE
Thomas Flaxl · Train, DE
Andreas Hagl · Dachau, DE

Key dates

Filing date	Aug 3, 2000
Grant date	Jan 6, 2004
Priority date	—
Expiry date	Mar 2, 2022

Classification

Technology area (CPC G)Physics
CPC primaryG06K7/0008
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

Transponders present in an interrogation zone can be identified by an interrogator by it sending an RF interrogation signal into the interrogation zone, the RF interrogation signal containing a code string prompting the transponders to generate partial addresses. As soon as one transponder “sees” that the generated partial address agrees with part of its own address, it responds by sending its full address which can then be read by the interrogator. Immediately after having received a full address the interrogator sends a code string characterizing the address of the transponder having responded before so that this transponder is thereby addressable. The signal sent by the interrogator to the transponder with this code string also contains an instruction which prompts the transponder to assume the condition in which it no longer responds to receiving its address or partial address.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.