Patent · US Active

Data carrier with modification means for modifying the load period

US7907897B2 · kind B2 · utility

0Cited by

2References

11Claims

0Family size

Assignee

NXP B.V. · NL

Inventors

Franz Amtmann · Graz, AT
Peter Raggam · Friesach, AT
Michael Rauber · Passail, AT

Key dates

Filing date	Jun 22, 2004
Grant date	Mar 15, 2011
Priority date	—
Expiry date	Aug 24, 2027

Classification

Technology area (CPC G)Physics
CPC primaryG06K19/0723
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

In a data carrier (1), there are provided modification means (19) for modifying, as a function of the distance between the data carrier (1) and the base station (4), the ratio of the duration of a load period (TB) to the duration of an off-load period (TE), at which ratio the data carrier (1) load-modulates the electromagnetic field (HF) generated by a base station (4).

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