Patent ID: 7098770
Filing Date: 2006-08-29
Classification: G06K

Abstract:
1. A device in order to transmit/receive data by inductive coupling comprising: an antenna circuit to generate a magnetic field; and an excitation circuit for delivering an alternating excitation signal to the antenna circuit, the device being configured to operate in a first operating mode and a second operating mode, when in the first operating mode, the device modulates the excitation signal when data is transmitted, and when in the second operating mode, the device applies a load modulation signal with two states to the antenna circuit when data is transmitted, so as to simulate the operation of a contactless integrated circuit, the load modulation signal being configured to disturb a magnetic field generated by another device in order to transmit/receive data by inductive coupling and being configured to be detected by the other device as if the load modulation signal were a load modulation signal applied to an antenna load modulation switch of a contactless integrated circuit.