Patent ID: 8143999
Filing Date: 2012-03-27
Classification: G06K

Abstract:
1. Circuit for a data carrier, which data carrier comprises sensor means for providing a sensor signal that represents an environment parameter and communication means for contactless communication with an interrogator station, said circuit comprising: first connection means for connecting the circuit to the communication means for communicating with the interrogator station, and for receiving radio frequency power from the interrogator station; second connection means for establishing an electronic connection of the circuit to the sensor means, wherein the second connection means are realized by the first connection means; and sensor signal processing means for receiving said sensor signal via the first connection means, for processing said received sensor signal, and for providing an output based upon the received sensor signal, to the interrogator station via the first connection means; wherein a first connection pad and a second connection pad constitute the first connection means, the respective pads coupling the circuit for simultaneously communicating with both the communication means and the sensor means; and a circuit configured and arranged to short-circuit radio frequency signals coupled to the connection pads from the communication means, during a sensing period in which the signal processing means is receiving a signal from the sensor means, via the respective pads.