Patent · US Active

Method and apparatus for checking a circuit

US9851399B2 · kind B2 · utility

5Cited by

4References

19Claims

0Family size

Assignee

GIESECKE+DEVRIENT MOBILE SECURITY GMBH · DE

Inventors

Klaus Finkenzeller · Unterföhring, DE
Michael Baldischweiler · Munich, DE

Key dates

Filing date	Feb 5, 2014
Grant date	Dec 26, 2017
Priority date	—
Expiry date	Oct 22, 2034

Classification

Technology area (CPC H)Electricity
CPC primaryH04B17/16
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

A method for checking a circuit devised for contactless data communication, which comprises an antenna and an electronic component coupled with the antenna, comprises the following steps: generating an alternating magnetic field of a field strength, and arranging the circuit in the alternating field region. Then the electronic circuit is excited by means of an energy pulse. In a further step, an oscillation of the circuit in response to the excitation of the circuit by the energy pulse is captured. The captured oscillation of the circuit is finally evaluated, in particular with regard to a self-resonant frequency of the circuit.

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