Nxp B.v.

Koninklijke Philips Corporation N.v.

Werner Zettler

Franz Amtmann

Ivan Jesus Rebollo Pimentel

Thomas Pichler

Peter Raggam

Christian Weidinger

Michael Cernusca

Heinz Umfahrer

A Radio Frequency Identification (RFID) tag is disclosed. The RFID tag includes an antenna to receive an input AC signal and a tuning system coupled with the antenna to optimize signal strength of the input AC signal. The tuning system includes a charge pump rectifier. A diode rectifier is included and is coupled with the antenna to receive the input AC signal after the tuning system optimizes the signal strength by tuning input impedance of the antenna.

Dual system RFID tag

A transponder with an antenna and an antenna voltage limiting unit for limiting an antenna voltage to a first voltage limit when the transponder is receiving data and to a second voltage limit when the transponder is sending data. Dynamic voltage limitation may be implemented by using a computer program or implemented in hardware. Additionally, it is possible to introduce a third voltage limit when the transponder is in a third mode of operation such as standby or sleeping mode.

Transponder with an improved voltage limiter circuit

A data carrier ( ) on which a carrier signal (TS) can be applied to an electric circuit ( ), comprises supply voltage generation means ( ) which are arranged for generating a DC supply voltage (U) that can be tapped from a supply tapping point ( ) while use is made of the carrier signal (TS), and further includes control means ( ) for controlling the DC supply voltage (U) in accordance with a controlled variable signal (CV) that represents the carrier signal (TS) occurring at a control means circuit point ( ), and further includes decoupling means ( ) with the aid of which the control means circuit point ( ) and the supply circuit point ( ) can be decoupled from each other.

Data carrier with controllable supply voltage generation means

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St. Marein im Muerztal, Austria

Werner Zettler