Patent · US Active

Transponder and method for operating a transponder

US8144017B1 · kind B1 · utility

3Cited by

4References

27Claims

0Family size

Assignee

Infineon Technologies AG · DE

Inventors

Thomas Leutgeb · Lieboch, AT
Josef Haid · Graz, AT
Walter Kargl · Graz, AT
Josef Riegebauer · Zeltweg, AT
Thomas Baglin · Rueil, FR
Albert Missoni · Graz, AT
Dietmar Scheiblhofer · Kaindorf, AT
Bernd Zimek · Graz, AT
Friedrich Skofitsch · Graz, AT
Markus Unterlercher · Graz, AT
Robert Hofer · Graz, AT

Key dates

Filing date	Feb 21, 2008
Grant date	Mar 27, 2012
Priority date	—
Expiry date	Jan 27, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH04B5/26
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

An RFID transponder having an adjustable response field strength including a determination circuit formed to determine a quantity which is derivable from a field strength of an electromagnetic field prevailing at the location of the RFID transponder, a comparator formed to compare the determined quantity derived from the field strength with a threshold value, wherein the threshold value is based on the adjustable response field strength, which is higher than the minimum field strength required for the operation of the RFID transponder, and a deactivator formed to deactivate a functionality of the RFID transponder if the derived quantity falls below the threshold value.

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